Re: [mm] 8fd8d23ab1: WARNING:at_fs/buffer.c:#__brelse

[Minchan Kim]

On Wed, Mar 17, 2021 at 10:37:57AM +0800, kernel test robot wrote:
> 
> 
> Greeting,
> 
> FYI, we noticed the following commit (built with gcc-9):
> 
> commit: 8fd8d23ab10cc2fceeac25ea7b0e2eaf98e78d64 ("[PATCH v3 3/3] mm: fs: Invalidate BH LRU during page migration")
> url: https://github.com/0day-ci/linux/commits/Minchan-Kim/mm-replace-migrate_prep-with-lru_add_drain_all/20210311-001714
> base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 144c79ef33536b4ecb4951e07dbc1f2b7fa99d32
> 
> in testcase: blktests
> version: blktests-x86_64-a210761-1_20210124
> with following parameters:
> 
> 	test: nbd-group-01
> 	ucode: 0xe2
> 
> 
> 
> on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G 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@xxxxxxxxx>
> 
> 
> [   40.465061] WARNING: CPU: 2 PID: 5207 at fs/buffer.c:1177 __brelse (kbuild/src/consumer/fs/buffer.c:1177 kbuild/src/consumer/fs/buffer.c:1171) 
> [   40.465066] Modules linked in: nbd loop xfs libcrc32c dm_multipath dm_mod ipmi_devintf ipmi_msghandler sd_mod t10_pi sg intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel rapl i915 mei_wdt intel_cstate wmi_bmof intel_gtt drm_kms_helper syscopyarea ahci intel_uncore sysfillrect sysimgblt libahci fb_sys_fops drm libata mei_me mei intel_pch_thermal wmi video intel_pmc_core acpi_pad ip_tables
> [   40.465086] CPU: 2 PID: 5207 Comm: mount_clear_soc Tainted: G          I       5.12.0-rc2-00062-g8fd8d23ab10c #1
> [   40.465088] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.1.1 10/07/2015
> [   40.465089] RIP: 0010:__brelse (kbuild/src/consumer/fs/buffer.c:1177 kbuild/src/consumer/fs/buffer.c:1171) 
> [ 40.465091] Code: 00 00 00 00 00 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 8b 47 60 85 c0 74 05 f0 ff 4f 60 c3 48 c7 c7 d8 99 57 82 e8 02 5d 80 00 <0f> 0b c3 0f 1f 44 00 00 55 65 ff 05 13 79 c8 7e 53 48 c7 c3 c0 89

Hi,

Unfortunately, I couldn't set the lkp test in my local mahcine
since installation failed(I guess my linux distribution is
very minor)

Do you mind testing this patch? (Please replace the original
patch with this one)