Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: 500a784e5c79a9226fa721ff862bba27c0d0b9d8 ("btrfs: async load free space cache")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master


in testcase: xfstests
version: xfstests-x86_64-d41dcbd-1_20201027
with following parameters:

	disk: 4HDD
	fs: btrfs
	test: generic-group03
	ucode: 0x21

test-description: xfstests is a regression test suite for xfs and other files ystems.
test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git


on test machine: 8 threads Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@intel.com>


kern  :info  : [    8.957646] intel_rapl_common: Found RAPL domain uncore
kern  :info  : [    9.065073] fbcon: i915drmfb (fb0) is primary device
kern  :info  : [    9.154114] Console: switching to colour frame buffer device 160x64
kern  :err   : [    9.159846] irq 16: nobody cared (try booting with the "irqpoll" option)
kern  :warn  : [    9.159851] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc2-00072-g500a784e5c79 #1
kern  :warn  : [    9.159851] Hardware name:  /DZ77BH-55K, BIOS BHZ7710H.86A.0097.2012.1228.1346 12/28/2012
kern  :warn  : [    9.159852] Call Trace:
kern  :warn  : [    9.159855]  <IRQ>
kern  :warn  : [    9.159864]  dump_stack+0x57/0x6a
kern  :warn  : [    9.159867]  __report_bad_irq+0x35/0xa7
kern  :warn  : [    9.159869]  note_interrupt.cold+0xb/0x61
kern  :warn  : [    9.159872]  handle_irq_event_percpu+0x6f/0x80
kern  :warn  : [    9.159874]  handle_irq_event+0x3d/0x60
kern  :warn  : [    9.159876]  handle_fasteoi_irq+0x8b/0x140
kern  :warn  : [    9.159880]  asm_call_irq_on_stack+0x12/0x20
kern  :warn  : [    9.159881]  </IRQ>
kern  :warn  : [    9.159883]  common_interrupt+0xb5/0x140
kern  :warn  : [    9.159886]  asm_common_interrupt+0x1e/0x40
kern  :warn  : [    9.159887] RIP: 0010:poll_idle+0x56/0xac
kern  :warn  : [    9.159890] Code: 8b 34 25 40 6f 01 00 f0 41 80 4e 02 20 49 8b 06 a8 08 75 3a 4c 89 e7 48 89 ee e8 15 b8 d4 ff 49 89 c4 b8 c9 00 00 00 49 8b 16 <83> e2 08 75 1f f3 90 83 e8 01 75 f1 65 8b 3d 97 8e 3e 7e e8 32 fa
kern  :warn  : [    9.159891] RSP: 0018:ffffffff82803e38 EFLAGS: 00000202
kern  :warn  : [    9.159892] RAX: 000000000000003e RBX: 0000000221f80ef0 RCX: 000000000000001f
kern  :warn  : [    9.159893] RDX: 0000000000204000 RSI: ffff88841f236100 RDI: ffffffff82ce95e0
kern  :warn  : [    9.159894] RBP: ffff88841f236100 R08: 0000000221f80ef0 R09: 000000000000020a
kern  :warn  : [    9.159894] R10: 0000000000000000 R11: ffff88841f22a104 R12: 00000000000003e8
kern  :warn  : [    9.159895] R13: 0000000000000000 R14: ffffffff82812940 R15: 0000000000000000
kern  :warn  : [    9.159899]  ? poll_idle+0x4b/0xac
kern  :warn  : [    9.159903]  cpuidle_enter_state+0x89/0x360
kern  :warn  : [    9.159906]  cpuidle_enter+0x29/0x40
kern  :warn  : [    9.159910]  do_idle+0x1cb/0x260
kern  :warn  : [    9.159912]  cpu_startup_entry+0x19/0x20
kern  :warn  : [    9.159916]  start_kernel+0x4a8/0x4c7
kern  :warn  : [    9.159920]  secondary_startup_64_no_verify+0xb8/0xbb
kern  :err   : [    9.159921] handlers:
kern  :err   : [    9.159925] [<00000000727d439a>] usb_hcd_irq
kern  :emerg : [    9.159926] Disabling IRQ #16
kern  :info  : [    9.176595] ata7: SATA link down (SStatus 0 SControl 300)
kern  :info  : [    9.176597] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Oliver Sang