Re: [Syzkaller & bisect] There is "__perf_event_overflow" WARNING in v6.1-rc5 kernel in guest
From: Pengfei Xu
Date: Wed Nov 23 2022 - 20:40:40 EST
Hi Peter,
On 2022-11-23 at 23:26:43 +0800, Pengfei Xu wrote:
> Hi Peter,
>
> On 2022-11-23 at 16:05:14 +0100, Peter Zijlstra wrote:
> > On Sat, Nov 19, 2022 at 10:45:54AM +0800, Pengfei Xu wrote:
> >
> > > The result shows that your additional patch fixed this issue!
> > > If possible, could you add Reported-and-tested-by tag from me.
> >
> > After talking with Marco for a bit the patch now looks like the below.
> > I've tentatively retained your tested-by, except of course, you haven't.
> >
> > If I could bother you once more to test the branch:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/urgent
> >
> Yes, sure, it's my pleasure! I will clone and test the origin/perf/urgent
> branch in this repo and update the email soon.
I tested https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
perf/urgent branch kernel, in the 53171 times execution:
Only below dmesg info print, there is no any "__perf_event_overflow" Call
Trace, the result show that this issue was fixed in above kernel.
"
53171 times ./repro
...
[ 59.184213] perf: interrupt took too long (2554 > 2500), lowering kernel.perf_event_max_sample_rate to 78250
[ 59.658503] perf: interrupt took too long (3303 > 3192), lowering kernel.perf_event_max_sample_rate to 60500
[ 60.157042] perf: interrupt took too long (4183 > 4128), lowering kernel.perf_event_max_sample_rate to 47750
[ 60.917294] perf: interrupt took too long (5312 > 5228), lowering kernel.perf_event_max_sample_rate to 37500
[ 62.370105] perf: interrupt took too long (6758 > 6640), lowering kernel.perf_event_max_sample_rate to 29500
[ 64.074435] perf: interrupt took too long (8457 > 8447), lowering kernel.perf_event_max_sample_rate to 23500
[ 66.916168] perf: interrupt took too long (10578 > 10571), lowering kernel.perf_event_max_sample_rate to 18750
[ 70.556182] perf: interrupt took too long (13232 > 13222), lowering kernel.perf_event_max_sample_rate to 15000
[ 76.730150] perf: interrupt took too long (16561 > 16540), lowering kernel.perf_event_max_sample_rate to 12000
[ 557.595321] perf: interrupt took too long (20732 > 20701), lowering kernel.perf_event_max_sample_rate to 9500
"
Dmesg is in attached.
Thanks!
BR.
>
> > ---
> > Subject: perf: Consider OS filter fail
> > From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> > Date: Sat, 19 Nov 2022 10:45:54 +0800
> >
> > Some PMUs (notably the traditional hardware kind) have boundary issues
> > with the OS filter. Specifically, it is possible for
> > perf_event_attr::exclude_kernel=1 events to trigger in-kernel due to
> > SKID or errata.
> >
> > This can upset the sigtrap logic some and trigger the WARN.
> >
> > However, if this invalid sample is the first we must not loose the
> > SIGTRAP, OTOH if it is the second, it must not override the
> > pending_addr with an invalid one.
> >
> > Fixes: ca6c21327c6a ("perf: Fix missing SIGTRAPs")
> > Reported-by: Pengfei Xu <pengfei.xu@xxxxxxxxx>
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> > Tested-by: Pengfei Xu <pengfei.xu@xxxxxxxxx>
> > Link: https://lkml.kernel.org/r/Y3hDYiXwRnJr8RYG@xxxxxxxxxxxxxxxx
> > ---
> > kernel/events/core.c | 24 ++++++++++++++++++++++--
> > 1 file changed, 22 insertions(+), 2 deletions(-)
> >
> > --- a/kernel/events/core.c
> > +++ b/kernel/events/core.c
> > @@ -9273,6 +9273,19 @@ int perf_event_account_interrupt(struct
> > return __perf_event_account_interrupt(event, 1);
> > }
> >
> > +static inline bool sample_is_allowed(struct perf_event *event, struct pt_regs *regs)
> > +{
> > + /*
> > + * Due to interrupt latency (AKA "skid"), we may enter the
> > + * kernel before taking an overflow, even if the PMU is only
> > + * counting user events.
> > + */
> > + if (event->attr.exclude_kernel && !user_mode(regs))
> > + return false;
> > +
> > + return true;
> > +}
> > +
> > /*
> > * Generic event overflow handling, sampling.
> > */
> > @@ -9306,6 +9319,13 @@ static int __perf_event_overflow(struct
> > }
> >
> > if (event->attr.sigtrap) {
> > + /*
> > + * The desired behaviour of sigtrap vs invalid samples is a bit
> > + * tricky; on the one hand, one should not loose the SIGTRAP if
> > + * it is the first event, on the other hand, we should also not
> > + * trigger the WARN or override the data address.
> > + */
> > + bool valid_sample = sample_is_allowed(event, regs);
> > unsigned int pending_id = 1;
> >
> > if (regs)
> > @@ -9313,7 +9333,7 @@ static int __perf_event_overflow(struct
> > if (!event->pending_sigtrap) {
> > event->pending_sigtrap = pending_id;
> > local_inc(&event->ctx->nr_pending);
> > - } else if (event->attr.exclude_kernel) {
> > + } else if (event->attr.exclude_kernel && valid_sample) {
> > /*
> > * Should not be able to return to user space without
> > * consuming pending_sigtrap; with exceptions:
> > @@ -9330,7 +9350,7 @@ static int __perf_event_overflow(struct
> > }
> >
> > event->pending_addr = 0;
> > - if (data->sample_flags & PERF_SAMPLE_ADDR)
> > + if (valid_sample && (data->sample_flags & PERF_SAMPLE_ADDR))
> > event->pending_addr = data->addr;
> > irq_work_queue(&event->pending_irq);
> > }
[ 0.000000] Linux version 6.1.0-rc6-kvmpeter+ (root@xxxxxxxxxxxxxxxx) (gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-10), GNU ld version 2.36.1-2.el8) #1 SMP PREEMP2
[ 0.000000] Command line: console=ttyS0 root=/dev/sda earlyprintk=serial net.ifnames=0 thunderbolt.dyndbg
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Hygon HygonGenuine
[ 0.000000] Centaur CentaurHauls
[ 0.000000] zhaoxin Shanghai
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x020: 'AVX-512 opmask'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x040: 'AVX-512 Hi256'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x080: 'AVX-512 ZMM_Hi256'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x200: 'Protection Keys User registers'
[ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 0.000000] x86/fpu: xstate_offset[5]: 832, xstate_sizes[5]: 64
[ 0.000000] x86/fpu: xstate_offset[6]: 896, xstate_sizes[6]: 512
[ 0.000000] x86/fpu: xstate_offset[7]: 1408, xstate_sizes[7]: 1024
[ 0.000000] x86/fpu: xstate_offset[9]: 2432, xstate_sizes[9]: 8
[ 0.000000] x86/fpu: Enabled xstate features 0x2e7, context size is 2440 bytes, using 'compacted' format.
[ 0.000000] signal: max sigframe size: 3632
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000007ffdffff] usable
[ 0.000000] BIOS-e820: [mem 0x000000007ffe0000-0x000000007fffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
[ 0.000000] printk: bootconsole [earlyser0] enabled
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.8 present.
[ 0.000000] DMI: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
[ 0.000000] Hypervisor detected: KVM
[ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
[ 0.000007] kvm-clock: using sched offset of 2648030348 cycles
[ 0.000562] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.002344] tsc: Detected 3110.400 MHz processor
[ 0.011148] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.011171] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.011194] last_pfn = 0x7ffe0 max_arch_pfn = 0x400000000
[ 0.011833] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.023704] found SMP MP-table at [mem 0x000f5ba0-0x000f5baf]
[ 0.024500] Using GB pages for direct mapping
[ 0.026408] ACPI: Early table checksum verification disabled
[ 0.027049] ACPI: RSDP 0x00000000000F59C0 000014 (v00 BOCHS )
[ 0.027704] ACPI: RSDT 0x000000007FFE1951 000034 (v01 BOCHS BXPC 00000001 BXPC 00000001)
[ 0.028687] ACPI: FACP 0x000000007FFE17FD 000074 (v01 BOCHS BXPC 00000001 BXPC 00000001)
[ 0.029627] ACPI: DSDT 0x000000007FFE0040 0017BD (v01 BOCHS BXPC 00000001 BXPC 00000001)
[ 0.030540] ACPI: FACS 0x000000007FFE0000 000040
[ 0.031028] ACPI: APIC 0x000000007FFE1871 000080 (v01 BOCHS BXPC 00000001 BXPC 00000001)
[ 0.031926] ACPI: HPET 0x000000007FFE18F1 000038 (v01 BOCHS BXPC 00000001 BXPC 00000001)
[ 0.032816] ACPI: WAET 0x000000007FFE1929 000028 (v01 BOCHS BXPC 00000001 BXPC 00000001)
[ 0.033735] ACPI: Reserving FACP table memory at [mem 0x7ffe17fd-0x7ffe1870]
[ 0.034486] ACPI: Reserving DSDT table memory at [mem 0x7ffe0040-0x7ffe17fc]
[ 0.035275] ACPI: Reserving FACS table memory at [mem 0x7ffe0000-0x7ffe003f]
[ 0.036043] ACPI: Reserving APIC table memory at [mem 0x7ffe1871-0x7ffe18f0]
[ 0.036795] ACPI: Reserving HPET table memory at [mem 0x7ffe18f1-0x7ffe1928]
[ 0.037569] ACPI: Reserving WAET table memory at [mem 0x7ffe1929-0x7ffe1950]
[ 0.039553] No NUMA configuration found
[ 0.039999] Faking a node at [mem 0x0000000000000000-0x000000007ffdffff]
[ 0.040797] NODE_DATA(0) allocated [mem 0x7ffb5000-0x7ffdffff]
[ 0.045324] Zone ranges:
[ 0.045599] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.046269] DMA32 [mem 0x0000000001000000-0x000000007ffdffff]
[ 0.046904] Normal empty
[ 0.047210] Device empty
[ 0.047511] Movable zone start for each node
[ 0.047943] Early memory node ranges
[ 0.048334] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.048981] node 0: [mem 0x0000000000100000-0x000000007ffdffff]
[ 0.049646] Initmem setup node 0 [mem 0x0000000000001000-0x000000007ffdffff]
[ 0.051200] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.051407] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.086650] On node 0, zone DMA32: 32 pages in unavailable ranges
[ 0.087630] ACPI: PM-Timer IO Port: 0x608
[ 0.088741] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.089397] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.090114] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.090784] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.091470] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.092174] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.092888] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.093613] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.094290] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[ 0.094835] TSC deadline timer available
[ 0.095261] smpboot: Allowing 2 CPUs, 0 hotplug CPUs
[ 0.095870] kvm-guest: KVM setup pv remote TLB flush
[ 0.096448] kvm-guest: setup PV sched yield
[ 0.096991] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.097810] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
[ 0.098594] PM: hibernation: Registered nosave memory: [mem 0x000a0000-0x000effff]
[ 0.099377] PM: hibernation: Registered nosave memory: [mem 0x000f0000-0x000fffff]
[ 0.100180] [mem 0x80000000-0xfeffbfff] available for PCI devices
[ 0.100816] Booting paravirtualized kernel on KVM
[ 0.101351] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns
[ 0.102515] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:1
[ 0.105733] percpu: Embedded 62 pages/cpu s217088 r8192 d28672 u1048576
[ 0.106516] pcpu-alloc: s217088 r8192 d28672 u1048576 alloc=1*2097152
[ 0.106541] pcpu-alloc: [0] 0 1
[ 0.106734] kvm-guest: PV spinlocks enabled
[ 0.107221] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.108031] Fallback order for Node 0: 0
[ 0.108466] Built 1 zonelists, mobility grouping on. Total pages: 515808
[ 0.109178] Policy zone: DMA32
[ 0.109488] Kernel command line: net.ifnames=0 console=ttyS0 root=/dev/sda earlyprintk=serial net.ifnames=0 thunderbolt.dyndbg
[ 0.113612] Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes, linear)
[ 0.115250] Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes, linear)
[ 0.116229] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.120882] Memory: 1999736K/2096632K available (30736K kernel code, 4081K rwdata, 7528K rodata, 3624K init, 10528K bss, 96640K reserved, 0K cma-reserved)
[ 0.123715] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[ 0.124507] kmemleak: Kernel memory leak detector disabled
[ 0.125200] ftrace: allocating 66320 entries in 260 pages
[ 0.161261] ftrace: allocated 260 pages with 2 groups
[ 0.163906] Dynamic Preempt: voluntary
[ 0.164427] rcu: Preemptible hierarchical RCU implementation.
[ 0.165078] rcu: RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=2.
[ 0.165875] Trampoline variant of Tasks RCU enabled.
[ 0.166605] Rude variant of Tasks RCU enabled.
[ 0.167262] Tracing variant of Tasks RCU enabled.
[ 0.167978] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
[ 0.169102] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 0.204201] NR_IRQS: 524544, nr_irqs: 440, preallocated irqs: 16
[ 0.205163] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 0.214837] Console: colour VGA+ 80x25
[ 0.215273] printk: console [ttyS0] enabled
[ 0.216162] printk: bootconsole [earlyser0] disabled
[ 0.217240] ACPI: Core revision 20220331
[ 0.217959] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
[ 0.219032] APIC: Switch to symmetric I/O mode setup
[ 0.219815] x2apic enabled
[ 0.220339] Switched APIC routing to physical x2apic.
[ 0.220968] kvm-guest: setup PV IPIs
[ 0.222397] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 0.223067] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x2cd5a8bb032, max_idle_ns: 440795365915 ns
[ 0.224232] Calibrating delay loop (skipped) preset value.. 6220.80 BogoMIPS (lpj=12441600)
[ 0.225120] pid_max: default: 32768 minimum: 301
[ 0.225813] LSM: Security Framework initializing
[ 0.226324] Yama: becoming mindful.
[ 0.226934] Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 0.228249] Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 0.232285] x86/cpu: User Mode Instruction Prevention (UMIP) activated
[ 0.233470] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[ 0.234119] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
[ 0.236314] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 0.237284] Spectre V2 : WARNING: Unprivileged eBPF is enabled with eIBRS on, data leaks possible via Spectre v2 BHB attacks!
[ 0.238442] Spectre V2 : Mitigation: Enhanced IBRS
[ 0.238912] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
[ 0.239725] Spectre V2 : Spectre v2 / PBRSB-eIBRS: Retire a single CALL on VMEXIT
[ 0.240231] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 0.241052] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[ 0.365972] Freeing SMP alternatives memory: 56K
[ 0.366829] smpboot: CPU0: Genuine Intel(R) CPU 0000 @ 2.20GHz (family: 0x6, model: 0x8d, stepping: 0x0)
[ 0.368134] cblist_init_generic: Setting adjustable number of callback queues.
[ 0.368220] cblist_init_generic: Setting shift to 1 and lim to 1.
[ 0.368220] cblist_init_generic: Setting shift to 1 and lim to 1.
[ 0.368220] cblist_init_generic: Setting shift to 1 and lim to 1.
[ 0.368246] Performance Events: Icelake events, full-width counters, Intel PMU driver.
[ 0.369160] ... version: 2
[ 0.369552] ... bit width: 48
[ 0.369965] ... generic registers: 8
[ 0.370359] ... value mask: 0000ffffffffffff
[ 0.370879] ... max period: 00007fffffffffff
[ 0.371398] ... fixed-purpose events: 3
[ 0.371790] ... event mask: 00000007000000ff
[ 0.372531] rcu: Hierarchical SRCU implementation.
[ 0.373009] rcu: Max phase no-delay instances is 1000.
[ 0.376357] smp: Bringing up secondary CPUs ...
[ 0.377130] x86: Booting SMP configuration:
[ 0.377544] .... node #0, CPUs: #1
[ 0.378068] smp: Brought up 1 node, 2 CPUs
[ 0.378068] smpboot: Max logical packages: 1
[ 0.378068] smpboot: Total of 2 processors activated (12441.60 BogoMIPS)
[ 0.383597] devtmpfs: initialized
[ 0.384335] x86/mm: Memory block size: 128MB
[ 0.386381] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.386381] futex hash table entries: 512 (order: 3, 32768 bytes, linear)
[ 0.388382] pinctrl core: initialized pinctrl subsystem
[ 0.389409] *************************************************************
[ 0.390072] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 0.390727] ** **
[ 0.391380] ** IOMMU DebugFS SUPPORT HAS BEEN ENABLED IN THIS KERNEL **
[ 0.392034] ** **
[ 0.392226] ** This means that this kernel is built to expose internal **
[ 0.392876] ** IOMMU data structures, which may compromise security on **
[ 0.393529] ** your system. **
[ 0.394186] ** **
[ 0.394838] ** If you see this message and you are not debugging the **
[ 0.395490] ** kernel, report this immediately to your vendor! **
[ 0.396154] ** **
[ 0.396224] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 0.396877] *************************************************************
[ 0.397588] PM: RTC time: 01:07:06, date: 2022-11-24
[ 0.403066] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 0.404166] DMA: preallocated 256 KiB GFP_KERNEL pool for atomic allocations
[ 0.404241] DMA: preallocated 256 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
[ 0.404981] DMA: preallocated 256 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
[ 0.405782] audit: initializing netlink subsys (disabled)
[ 0.406410] audit: type=2000 audit(1669252026.340:1): state=initialized audit_enabled=0 res=1
[ 0.406410] thermal_sys: Registered thermal governor 'fair_share'
[ 0.406410] thermal_sys: Registered thermal governor 'bang_bang'
[ 0.406410] thermal_sys: Registered thermal governor 'step_wise'
[ 0.408228] thermal_sys: Registered thermal governor 'user_space'
[ 0.408838] cpuidle: using governor ladder
[ 0.409849] cpuidle: using governor menu
[ 0.410574] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.411517] PCI: Using configuration type 1 for base access
[ 0.421875] kprobes: kprobe jump-optimization is enabled. All kprobes are optimized if possible.
[ 0.664745] HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages
[ 0.665462] HugeTLB: 16380 KiB vmemmap can be freed for a 1.00 GiB page
[ 0.666136] HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages
[ 0.666817] HugeTLB: 28 KiB vmemmap can be freed for a 2.00 MiB page
[ 0.669825] ACPI: Added _OSI(Module Device)
[ 0.670279] ACPI: Added _OSI(Processor Device)
[ 0.670734] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.671211] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.676564] ACPI: 1 ACPI AML tables successfully acquired and loaded
[ 0.679908] ACPI: Interpreter enabled
[ 0.680299] ACPI: PM: (supports S0 S3 S4 S5)
[ 0.680725] ACPI: Using IOAPIC for interrupt routing
[ 0.681264] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.682180] PCI: Using E820 reservations for host bridge windows
[ 0.683362] ACPI: Enabled 2 GPEs in block 00 to 0F
[ 0.697143] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 0.697809] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI EDR HPX-Type3]
[ 0.698650] acpi PNP0A03:00: _OSC: not requesting OS control; OS requires [ExtendedConfig ASPM ClockPM MSI]
[ 0.699678] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[ 0.701941] acpiphp: Slot [3] registered
[ 0.702423] acpiphp: Slot [4] registered
[ 0.702889] acpiphp: Slot [5] registered
[ 0.703350] acpiphp: Slot [6] registered
[ 0.703815] acpiphp: Slot [7] registered
[ 0.704286] acpiphp: Slot [8] registered
[ 0.704749] acpiphp: Slot [9] registered
[ 0.705225] acpiphp: Slot [10] registered
[ 0.705697] acpiphp: Slot [11] registered
[ 0.706171] acpiphp: Slot [12] registered
[ 0.706645] acpiphp: Slot [13] registered
[ 0.707119] acpiphp: Slot [14] registered
[ 0.707604] acpiphp: Slot [15] registered
[ 0.708076] acpiphp: Slot [16] registered
[ 0.708283] acpiphp: Slot [17] registered
[ 0.708765] acpiphp: Slot [18] registered
[ 0.709244] acpiphp: Slot [19] registered
[ 0.709719] acpiphp: Slot [20] registered
[ 0.710191] acpiphp: Slot [21] registered
[ 0.710663] acpiphp: Slot [22] registered
[ 0.711149] acpiphp: Slot [23] registered
[ 0.711632] acpiphp: Slot [24] registered
[ 0.712107] acpiphp: Slot [25] registered
[ 0.712288] acpiphp: Slot [26] registered
[ 0.712757] acpiphp: Slot [27] registered
[ 0.713228] acpiphp: Slot [28] registered
[ 0.713709] acpiphp: Slot [29] registered
[ 0.714197] acpiphp: Slot [30] registered
[ 0.714670] acpiphp: Slot [31] registered
[ 0.715121] PCI host bridge to bus 0000:00
[ 0.715547] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
[ 0.716227] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window]
[ 0.716921] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[ 0.717688] pci_bus 0000:00: root bus resource [mem 0x80000000-0xfebfffff window]
[ 0.718449] pci_bus 0000:00: root bus resource [mem 0x100000000-0x17fffffff window]
[ 0.719225] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 0.719848] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000
[ 0.722829] pci 0000:00:01.0: [8086:7000] type 00 class 0x060100
[ 0.724148] pci 0000:00:01.1: [8086:7010] type 00 class 0x010180
[ 0.725950] pci 0000:00:01.1: reg 0x20: [io 0xc040-0xc04f]
[ 0.727400] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7]
[ 0.728139] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6]
[ 0.728229] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177]
[ 0.728957] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376]
[ 0.729916] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000
[ 0.730879] pci 0000:00:01.3: quirk: [io 0x0600-0x063f] claimed by PIIX4 ACPI
[ 0.731636] pci 0000:00:01.3: quirk: [io 0x0700-0x070f] claimed by PIIX4 SMB
[ 0.732495] pci 0000:00:02.0: [1234:1111] type 00 class 0x030000
[ 0.736272] pci 0000:00:02.0: reg 0x10: [mem 0xfd000000-0xfdffffff pref]
[ 0.740066] pci 0000:00:02.0: reg 0x18: [mem 0xfebf0000-0xfebf0fff]
[ 0.745679] pci 0000:00:02.0: reg 0x30: [mem 0xfebe0000-0xfebeffff pref]
[ 0.746933] pci 0000:00:02.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[ 0.750736] pci 0000:00:03.0: [8086:100e] type 00 class 0x020000
[ 0.752114] pci 0000:00:03.0: reg 0x10: [mem 0xfebc0000-0xfebdffff]
[ 0.752903] pci 0000:00:03.0: reg 0x14: [io 0xc000-0xc03f]
[ 0.757012] pci 0000:00:03.0: reg 0x30: [mem 0xfeb80000-0xfebbffff pref]
[ 0.773216] ACPI: PCI: Interrupt link LNKA configured for IRQ 10
[ 0.774204] ACPI: PCI: Interrupt link LNKB configured for IRQ 10
[ 0.775186] ACPI: PCI: Interrupt link LNKC configured for IRQ 11
[ 0.776132] ACPI: PCI: Interrupt link LNKD configured for IRQ 11
[ 0.776400] ACPI: PCI: Interrupt link LNKS configured for IRQ 9
[ 0.778500] iommu: Default domain type: Translated
[ 0.779022] iommu: DMA domain TLB invalidation policy: lazy mode
[ 0.780557] SCSI subsystem initialized
[ 0.781147] libata version 3.00 loaded.
[ 0.781273] ACPI: bus type USB registered
[ 0.781787] usbcore: registered new interface driver usbfs
[ 0.782402] usbcore: registered new interface driver hub
[ 0.783010] usbcore: registered new device driver usb
[ 0.783616] pps_core: LinuxPPS API ver. 1 registered
[ 0.784157] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@xxxxxxxx>
[ 0.784235] PTP clock support registered
[ 0.784817] EDAC MC: Ver: 3.0.0
[ 0.785311] EDAC DEBUG: edac_mc_sysfs_init: device mc created
[ 0.786311] NetLabel: Initializing
[ 0.786676] NetLabel: domain hash size = 128
[ 0.787130] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 0.787758] NetLabel: unlabeled traffic allowed by default
[ 0.788491] PCI: Using ACPI for IRQ routing
[ 0.788938] PCI: pci_cache_line_size set to 64 bytes
[ 0.789036] e820: reserve RAM buffer [mem 0x0009fc00-0x0009ffff]
[ 0.789049] e820: reserve RAM buffer [mem 0x7ffe0000-0x7fffffff]
[ 0.789149] pci 0000:00:02.0: vgaarb: setting as boot VGA device
[ 0.789782] pci 0000:00:02.0: vgaarb: bridge control possible
[ 0.790346] pci 0000:00:02.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
[ 0.791212] vgaarb: loaded
[ 0.792081] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[ 0.792228] hpet0: 3 comparators, 64-bit 100.000000 MHz counter
[ 3.793006] clocksource: Switched to clocksource kvm-clock
[ 3.911698] VFS: Disk quotas dquot_6.6.0
[ 3.912213] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 3.913112] pnp: PnP ACPI init
[ 3.913769] pnp 00:02: [dma 2]
[ 3.915025] pnp: PnP ACPI: found 6 devices
[ 3.925973] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[ 3.927212] NET: Registered PF_INET protocol family
[ 3.928755] IP idents hash table entries: 32768 (order: 6, 262144 bytes, linear)
[ 3.932799] tcp_listen_portaddr_hash hash table entries: 1024 (order: 2, 16384 bytes, linear)
[ 3.933711] Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
[ 3.934639] TCP established hash table entries: 16384 (order: 5, 131072 bytes, linear)
[ 3.935768] TCP bind hash table entries: 16384 (order: 7, 524288 bytes, linear)
[ 3.937062] TCP: Hash tables configured (established 16384 bind 16384)
[ 3.937893] UDP hash table entries: 1024 (order: 3, 32768 bytes, linear)
[ 3.938679] UDP-Lite hash table entries: 1024 (order: 3, 32768 bytes, linear)
[ 3.939611] NET: Registered PF_UNIX/PF_LOCAL protocol family
[ 3.940879] RPC: Registered named UNIX socket transport module.
[ 3.941498] RPC: Registered udp transport module.
[ 3.941974] RPC: Registered tcp transport module.
[ 3.942480] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 3.943255] pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7 window]
[ 3.943860] pci_bus 0000:00: resource 5 [io 0x0d00-0xffff window]
[ 3.944476] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff window]
[ 3.945310] pci_bus 0000:00: resource 7 [mem 0x80000000-0xfebfffff window]
[ 3.946118] pci_bus 0000:00: resource 8 [mem 0x100000000-0x17fffffff window]
[ 3.947023] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[ 3.947618] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 3.948438] PCI: CLS 0 bytes, default 64
[ 3.949190] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x2cd5a8bb032, max_idle_ns: 440795365915 ns
[ 3.953540] Initialise system trusted keyrings
[ 3.954187] Key type blacklist registered
[ 3.954784] workingset: timestamp_bits=36 max_order=19 bucket_order=0
[ 3.961243] zbud: loaded
[ 3.962675] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 3.964691] NFS: Registering the id_resolver key type
[ 3.965231] Key type id_resolver registered
[ 3.965640] Key type id_legacy registered
[ 3.966127] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 3.966776] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[ 3.968303] fuse: init (API version 7.37)
[ 3.968962] SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled
[ 3.971007] 9p: Installing v9fs 9p2000 file system support
[ 3.980798] Key type asymmetric registered
[ 3.981214] Asymmetric key parser 'x509' registered
[ 3.982816] alg: self-tests for CTR-KDF (hmac(sha256)) passed
[ 3.983522] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 243)
[ 3.984371] io scheduler mq-deadline registered
[ 3.984929] io scheduler bfq registered
[ 3.986010] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 3.986945] IPMI message handler: version 39.2
[ 3.987506] ipmi device interface
[ 3.989059] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 3.989902] ACPI: button: Power Button [PWRF]
[ 3.991093] ERST DBG: ERST support is disabled.
[ 3.992030] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
[ 3.992819] serial 00:04: GPIO lookup for consumer rs485-term
[ 3.992831] serial 00:04: using ACPI for GPIO lookup
[ 3.992844] acpi PNP0501:00: GPIO: looking up rs485-term-gpios
[ 3.992856] acpi PNP0501:00: GPIO: looking up rs485-term-gpio
[ 3.992865] serial 00:04: using lookup tables for GPIO lookup
[ 3.992878] serial 00:04: No GPIO consumer rs485-term found
[ 3.993126] 00:04: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 3.999688] Linux agpgart interface v0.103
[ 4.000585] ACPI: bus type drm_connector registered
[ 4.010431] brd: module loaded
[ 4.017494] loop: module loaded
[ 4.019648] ata_piix 0000:00:01.1: version 2.13
[ 4.021003] scsi host0: ata_piix
[ 4.021847] scsi host1: ata_piix
[ 4.022314] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc040 irq 14
[ 4.022999] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc048 irq 15
[ 4.024095] mdio_bus fixed-0: GPIO lookup for consumer reset
[ 4.024106] mdio_bus fixed-0: using lookup tables for GPIO lookup
[ 4.024115] mdio_bus fixed-0: No GPIO consumer reset found
[ 4.024399] tun: Universal TUN/TAP device driver, 1.6
[ 4.025187] e100: Intel(R) PRO/100 Network Driver
[ 4.025746] e100: Copyright(c) 1999-2006 Intel Corporation
[ 4.026333] e1000: Intel(R) PRO/1000 Network Driver
[ 4.026906] e1000: Copyright (c) 1999-2006 Intel Corporation.
[ 4.126917] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 4.180429] ata1: found unknown device (class 0)
[ 4.181382] ata1.00: ATA-7: QEMU HARDDISK, 2.5+, max UDMA/100
[ 4.181947] ata1.00: 16777216 sectors, multi 16: LBA48
[ 4.182741] ata2: found unknown device (class 0)
[ 4.183860] scsi 0:0:0:0: Direct-Access ATA QEMU HARDDISK 2.5+ PQ: 0 ANSI: 5
[ 4.185097] scsi 0:0:0:0: Attached scsi generic sg0 type 0
[ 4.186026] sd 0:0:0:0: [sda] 16777216 512-byte logical blocks: (8.59 GB/8.00 GiB)
[ 4.187034] ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100
[ 4.187766] sd 0:0:0:0: [sda] Write Protect is off
[ 4.188294] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 4.188535] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 4.189894] scsi 1:0:0:0: CD-ROM QEMU QEMU DVD-ROM 2.5+ PQ: 0 ANSI: 5
[ 4.191570] sd 0:0:0:0: [sda] Preferred minimum I/O size 512 bytes
[ 4.213689] sd 0:0:0:0: [sda] Attached SCSI disk
[ 4.220732] scsi 1:0:0:0: Attached scsi generic sg1 type 5
[ 4.455489] e1000 0000:00:03.0 eth0: (PCI:33MHz:32-bit) 52:54:00:12:34:56
[ 4.456198] e1000 0000:00:03.0 eth0: Intel(R) PRO/1000 Network Connection
[ 4.456992] e1000e: Intel(R) PRO/1000 Network Driver
[ 4.457511] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 4.458148] igb: Intel(R) Gigabit Ethernet Network Driver
[ 4.458724] igb: Copyright (c) 2007-2014 Intel Corporation.
[ 4.459480] PPP generic driver version 2.4.2
[ 4.460345] VFIO - User Level meta-driver version: 0.3
[ 4.461336] usbcore: registered new interface driver uas
[ 4.461910] usbcore: registered new interface driver usb-storage
[ 4.462626] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
[ 4.464037] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 4.464541] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 4.465555] mousedev: PS/2 mouse device common for all mice
[ 4.466582] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input1
[ 4.468156] input: VirtualPS/2 VMware VMMouse as /devices/platform/i8042/serio1/input/input4
[ 4.469035] rtc_cmos 00:05: RTC can wake from S4
[ 4.470006] input: VirtualPS/2 VMware VMMouse as /devices/platform/i8042/serio1/input/input3
[ 4.470431] rtc_cmos 00:05: registered as rtc0
[ 4.471666] rtc_cmos 00:05: setting system clock to 2022-11-24T01:07:14 UTC (1669252034)
[ 4.472538] rtc_cmos 00:05: GPIO lookup for consumer wp
[ 4.472547] rtc_cmos 00:05: using ACPI for GPIO lookup
[ 4.472557] acpi PNP0B00:00: GPIO: looking up wp-gpios
[ 4.472567] acpi PNP0B00:00: GPIO: looking up wp-gpio
[ 4.472576] rtc_cmos 00:05: using lookup tables for GPIO lookup
[ 4.472585] rtc_cmos 00:05: No GPIO consumer wp found
[ 4.472648] rtc_cmos 00:05: alarms up to one day, y3k, 242 bytes nvram, hpet irqs
[ 4.473557] i2c_dev: i2c /dev entries driver
[ 4.474069] device-mapper: core: CONFIG_IMA_DISABLE_HTABLE is disabled. Duplicate IMA measurements will not be recorded in the IMA log.
[ 4.475457] device-mapper: uevent: version 1.0.3
[ 4.476124] device-mapper: ioctl: 4.47.0-ioctl (2022-07-28) initialised: dm-devel@xxxxxxxxxx
[ 4.476963] intel_pstate: CPU model not supported
[ 4.477520] sdhci: Secure Digital Host Controller Interface driver
[ 4.478241] sdhci: Copyright(c) Pierre Ossman
[ 4.478779] sdhci-pltfm: SDHCI platform and OF driver helper
[ 4.479427] ledtrig-cpu: registered to indicate activity on CPUs
[ 4.480236] drop_monitor: Initializing network drop monitor service
[ 4.481340] NET: Registered PF_INET6 protocol family
[ 4.483493] Segment Routing with IPv6
[ 4.483905] In-situ OAM (IOAM) with IPv6
[ 4.484366] NET: Registered PF_PACKET protocol family
[ 4.485094] 9pnet: Installing 9P2000 support
[ 4.485620] Key type dns_resolver registered
[ 4.486665] IPI shorthand broadcast: enabled
[ 4.487125] sched_clock: Marking stable (4472056370, 14355862)->(8546483179, -4060070947)
[ 4.488290] registered taskstats version 1
[ 4.488762] Loading compiled-in X.509 certificates
[ 4.490275] zswap: loaded using pool lzo/zbud
[ 4.491155] Key type .fscrypt registered
[ 4.491539] Key type fscrypt-provisioning registered
[ 4.492829] Key type encrypted registered
[ 4.493263] ima: No TPM chip found, activating TPM-bypass!
[ 4.493810] ima: Allocated hash algorithm: sha1
[ 4.494276] ima: No architecture policies found
[ 4.494741] evm: Initialising EVM extended attributes:
[ 4.495236] evm: security.selinux
[ 4.495558] evm: security.SMACK64
[ 4.495880] evm: security.SMACK64EXEC
[ 4.496254] evm: security.SMACK64TRANSMUTE
[ 4.496662] evm: security.SMACK64MMAP
[ 4.497020] evm: security.apparmor
[ 4.497352] evm: security.ima
[ 4.497644] evm: security.capability
[ 4.497992] evm: HMAC attrs: 0x1
[ 4.502487] PM: Magic number: 14:3:105
[ 4.503236] RAS: Correctable Errors collector initialized.
[ 4.504108] md: Waiting for all devices to be available before autodetect
[ 4.504566] md: If you don't use raid, use raid=noautodetect
[ 4.504932] md: Autodetecting RAID arrays.
[ 4.505195] md: autorun ...
[ 4.505377] md: ... autorun DONE.
[ 4.514777] EXT4-fs (sda): INFO: recovery required on readonly filesystem
[ 4.515220] EXT4-fs (sda): write access will be enabled during recovery
[ 4.533528] EXT4-fs (sda): recovery complete
[ 4.535374] EXT4-fs (sda): mounted filesystem with ordered data mode. Quota mode: none.
[ 4.535931] VFS: Mounted root (ext4 filesystem) readonly on device 8:0.
[ 4.538323] devtmpfs: mounted
[ 4.547356] Freeing unused decrypted memory: 2036K
[ 4.550245] Freeing unused kernel image (initmem) memory: 3624K
[ 4.550633] Write protecting the kernel read-only data: 40960k
[ 4.553741] Freeing unused kernel image (text/rodata gap) memory: 2028K
[ 4.554750] Freeing unused kernel image (rodata/data gap) memory: 664K
[ 4.660373] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 4.660840] Run /sbin/init as init process
[ 4.661110] with arguments:
[ 4.661116] /sbin/init
[ 4.661122] with environment:
[ 4.661126] HOME=/
[ 4.661131] TERM=linux
[ 4.755876] systemd[1]: RTC configured in localtime, applying delta of 0 minutes to system time.
[ 4.780538] systemd[1]: systemd 239 (239-49.el8) running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +G)
[ 4.782044] systemd[1]: Detected virtualization kvm.
[ 4.782390] systemd[1]: Detected architecture x86-64.
[ 4.839652] systemd[1]: Set hostname to <test>.
[ 5.904236] random: crng init done
[ 6.005325] systemd[1]: Created slice system-serial\x2dgetty.slice.
[ 6.011242] systemd[1]: Listening on Process Core Dump Socket.
[ 6.012298] systemd[1]: Listening on udev Kernel Socket.
[ 6.013212] systemd[1]: Listening on udev Control Socket.
[ 6.014223] systemd[1]: Listening on Journal Socket.
[ 6.032445] systemd[1]: Mounting Huge Pages File System...
[ 6.204262] EXT4-fs (sda): re-mounted. Quota mode: none.
[ 7.920284] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[ 7.921178] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 8.182278] Spectre V2 : WARNING: Unprivileged eBPF is enabled with eIBRS on, data leaks possible via Spectre v2 BHB attacks!
[ 8.183001] Spectre V2 : WARNING: Unprivileged eBPF is enabled with eIBRS on, data leaks possible via Spectre v2 BHB attacks!
[ 59.184213] perf: interrupt took too long (2554 > 2500), lowering kernel.perf_event_max_sample_rate to 78250
[ 59.658503] perf: interrupt took too long (3303 > 3192), lowering kernel.perf_event_max_sample_rate to 60500
[ 60.157042] perf: interrupt took too long (4183 > 4128), lowering kernel.perf_event_max_sample_rate to 47750
[ 60.917294] perf: interrupt took too long (5312 > 5228), lowering kernel.perf_event_max_sample_rate to 37500
[ 62.370105] perf: interrupt took too long (6758 > 6640), lowering kernel.perf_event_max_sample_rate to 29500
[ 64.074435] perf: interrupt took too long (8457 > 8447), lowering kernel.perf_event_max_sample_rate to 23500
[ 66.916168] perf: interrupt took too long (10578 > 10571), lowering kernel.perf_event_max_sample_rate to 18750
[ 70.556182] perf: interrupt took too long (13232 > 13222), lowering kernel.perf_event_max_sample_rate to 15000
[ 76.730150] perf: interrupt took too long (16561 > 16540), lowering kernel.perf_event_max_sample_rate to 12000
[ 557.595321] perf: interrupt took too long (20732 > 20701), lowering kernel.perf_event_max_sample_rate to 9500