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Date: Fri, 17 Jan 2020 17:45:02 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Jens Axboe <axboe@...nel.dk>
Cc: LKML <linux-kernel@...r.kernel.org>, Jens Axboe <axboe@...com>,
Jens Axboe <axboe@...nel.dk>, lkp@...ts.01.org
Subject: [blk] fdb4635422: WARNING:at_kernel/sched/core.c:#__might_sleep
FYI, we noticed the following commit (built with gcc-7):
commit: fdb4635422b2d888fa9427c48308a3b74edd7e33 ("blk-mq: allocate tags in batches")
https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-5.6/block-test
in testcase: xfstests
with following parameters:
disk: 4HDD
fs: xfs
test: xfs-group12
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: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-----------------------------------------------+------------+------------+
| | bb2d58c57d | fdb4635422 |
+-----------------------------------------------+------------+------------+
| boot_successes | 4 | 3 |
| boot_failures | 0 | 12 |
| WARNING:at_kernel/sched/core.c:#__might_sleep | 0 | 12 |
| RIP:__might_sleep | 0 | 12 |
+-----------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 36.455650] WARNING: CPU: 1 PID: 30 at kernel/sched/core.c:6751 __might_sleep+0x71/0x80
[ 36.458249] Modules linked in: xfs libcrc32c dm_mod bochs_drm drm_vram_helper sr_mod drm_ttm_helper cdrom sg ttm ata_generic intel_rapl_msr intel_rapl_common pata_acpi snd_pcm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel snd_timer ppdev drm aesni_intel snd crypto_simd cryptd glue_helper soundcore joydev pcspkr ata_piix serio_raw libata i2c_piix4 floppy parport_pc parport ip_tables
[ 36.471885] CPU: 1 PID: 30 Comm: kworker/u4:1 Not tainted 5.5.0-rc2-00198-gfdb4635422b2d #4
[ 36.479095] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 36.481801] Workqueue: writeback wb_workfn (flush-253:48)
[ 36.483922] RIP: 0010:__might_sleep+0x71/0x80
[ 36.486024] Code: 5c 41 5d 5d e9 90 fe ff ff 48 8b 90 00 22 00 00 48 8b 70 10 48 c7 c7 28 06 73 85 c6 05 78 03 73 01 01 48 89 d1 e8 cf 0b fd ff <0f> 0b eb c7 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 8b 05
[ 36.491504] RSP: 0018:ffffa0e240107908 EFLAGS: 00010282
[ 36.493610] RAX: 0000000000000000 RBX: ffffffff8572bc98 RCX: 0000000000000000
[ 36.496099] RDX: 0000000000000001 RSI: ffff8d183fd19b38 RDI: ffff8d183fd19b38
[ 36.498446] RBP: ffffa0e240107920 R08: 00000000000003dc R09: 0000000000aaaaaa
[ 36.500886] R10: ffffa0e240107af0 R11: ffff8d1817ddf290 R12: 0000000000000026
[ 36.503176] R13: 0000000000000000 R14: ffff8d17e0692e00 R15: ffff8d17be0586c8
[ 36.505602] FS: 0000000000000000(0000) GS:ffff8d183fd00000(0000) knlGS:0000000000000000
[ 36.507179] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 36.508428] CR2: 00007efd8bad9000 CR3: 00000001d269a000 CR4: 00000000000406e0
[ 36.509863] Call Trace:
[ 36.510870] ? blk_mq_tag_ctx_flush_batch+0x70/0x70
[ 36.512105] cpus_read_lock+0x18/0x50
[ 36.513173] blk_mq_tag_flush_batches+0x42/0x80
[ 36.514317] blk_mq_get_tag+0x221/0x310
[ 36.515404] ? finish_wait+0x80/0x80
[ 36.516497] blk_mq_get_request+0xd3/0x370
[ 36.517640] blk_mq_make_request+0x10f/0x600
[ 36.518742] generic_make_request+0x121/0x310
[ 36.519843] ? submit_bio+0x3c/0x160
[ 36.520932] submit_bio+0x3c/0x160
[ 36.522009] iomap_submit_ioend+0x48/0x70
[ 36.523307] xfs_vm_writepages+0x6b/0x90 [xfs]
[ 36.524429] do_writepages+0x4b/0xf0
[ 36.525446] ? __blk_mq_run_hw_queue+0x60/0x130
[ 36.526646] ? reschedule_interrupt+0xa/0x20
[ 36.527743] ? __writeback_single_inode+0x3d/0x370
[ 36.528861] __writeback_single_inode+0x3d/0x370
[ 36.529979] writeback_sb_inodes+0x1f5/0x4d0
[ 36.531075] wb_writeback+0xfe/0x330
[ 36.532114] ? wb_workfn+0xdf/0x430
[ 36.533117] wb_workfn+0xdf/0x430
[ 36.534120] process_one_work+0x1ae/0x3d0
[ 36.535180] worker_thread+0x3c/0x3b0
[ 36.536242] ? process_one_work+0x3d0/0x3d0
[ 36.537354] kthread+0x11e/0x140
[ 36.538332] ? kthread_park+0x90/0x90
[ 36.539319] ret_from_fork+0x35/0x40
[ 36.540289] ---[ end trace aa7b87584ce25e83 ]---
To reproduce:
# build kernel
cd linux
cp config-5.5.0-rc2-00198-gfdb4635422b2d .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
Thanks,
Rong Chen
View attachment "config-5.5.0-rc2-00198-gfdb4635422b2d" of type "text/plain" (202415 bytes)
View attachment "job-script" of type "text/plain" (5556 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (18636 bytes)
View attachment "xfstests" of type "text/plain" (2292 bytes)
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