Date:   Tue, 26 May 2020 12:57:43 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com,
        Jaegeuk Kim <jaegeuk@...nel.org>, lkp@...ts.01.org
Subject: [f2fs] b783564847: WARNING:at_kernel/sched/core.c:#__might_sleep

Greeting,

FYI, we noticed the following commit (built with gcc-7):

commit: b78356484793c82e07fe6f7ca3b62b1f18651267 ("[PATCH] f2fs: flush dirty meta pages when flushing them")
url: https://github.com/0day-ci/linux/commits/Jaegeuk-Kim/f2fs-flush-dirty-meta-pages-when-flushing-them/20200515-101937
base: https://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs.git dev-test

in testcase: xfstests
with following parameters:

	disk: 4HDD
	fs: f2fs
	test: generic-group13

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):




If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>


[   20.432705] WARNING: CPU: 0 PID: 819 at kernel/sched/core.c:6763 __might_sleep+0x71/0x80
[   20.433992] Modules linked in: dm_mod f2fs sr_mod cdrom intel_rapl_msr sg bochs_drm drm_vram_helper drm_ttm_helper ttm ppdev intel_rapl_common drm_kms_helper crct10dif_pclmul ata_generic pata_acpi crc32_pclmul crc32c_intel snd_pcm ghash_clmulni_intel snd_timer syscopyarea sysfillrect snd sysimgblt fb_sys_fops aesni_intel crypto_simd soundcore cryptd glue_helper ata_piix joydev drm pcspkr libata serio_raw i2c_piix4 parport_pc parport floppy ip_tables
[   20.438562] CPU: 0 PID: 819 Comm: umount Not tainted 5.6.0-11895-gb78356484793c #1
[   20.439391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[   20.440584] RIP: 0010:__might_sleep+0x71/0x80
[   20.440981] Code: 5c 41 5d 5d e9 90 fe ff ff 48 8b 90 08 22 00 00 48 8b 70 10 48 c7 c7 f8 84 b3 85 c6 05 f9 0e 74 01 01 48 89 d1 e8 4f fd fc ff <0f> 0b eb c7 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 8b 05
[   20.443456] RSP: 0018:ffff98170098ba08 EFLAGS: 00010282
[   20.444212] RAX: 0000000000000000 RBX: ffffffffc05d35b8 RCX: 0000000000000000
[   20.445253] RDX: 0000000000000001 RSI: ffff89343fc19b88 RDI: ffff89343fc19b88
[   20.446408] RBP: ffff98170098ba20 R08: 0000000000000000 R09: 0000000000aaaaaa
[   20.447608] R10: 0000000000000040 R11: ffff89330c48f360 R12: 00000000000001df
[   20.448834] R13: 0000000000000000 R14: ffff8933bad80178 R15: ffffc9ec06e7c000
[   20.449985] FS:  00007f63193b7e40(0000) GS:ffff89343fc00000(0000) knlGS:0000000000000000
[   20.451319] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.452099] CR2: 000055ace9a90350 CR3: 00000001bc424000 CR4: 00000000000406f0
[   20.452801] Call Trace:
[   20.453125]  f2fs_sync_meta_pages+0x1a1/0x2c0 [f2fs]
[   20.453593]  ? __mod_lruvec_state+0x3f/0x100
[   20.454182]  ? xas_load+0x8/0x80
[   20.454554]  ? __xa_set_mark+0x5b/0x80
[   20.454910]  ? f2fs_wait_on_all_pages+0xc0/0xf0 [f2fs]
[   20.455382]  f2fs_wait_on_all_pages+0xc0/0xf0 [f2fs]
[   20.455963]  ? finish_wait+0x80/0x80
[   20.456524]  do_checkpoint+0x5ac/0xe10 [f2fs]
[   20.457178]  ? _cond_resched+0x19/0x30
[   20.457739]  ? down_write+0x21/0x50
[   20.458273]  ? __submit_merged_write_cond+0x15e/0x190 [f2fs]
[   20.459117]  f2fs_write_checkpoint+0x70e/0x780 [f2fs]
[   20.459878]  f2fs_sync_fs+0x9f/0x130 [f2fs]
[   20.461543]  sync_filesystem+0x71/0x90
[   20.463113]  generic_shutdown_super+0x22/0x120
[   20.464775]  kill_block_super+0x21/0x50
[   20.466362]  kill_f2fs_super+0x79/0xd0 [f2fs]
[   20.467985]  ? unregister_shrinker+0x69/0x80
[   20.469591]  deactivate_locked_super+0x3f/0x70
[   20.471187]  cleanup_mnt+0xb8/0x150
[   20.472670]  task_work_run+0x83/0xc0
[   20.474149]  exit_to_usermode_loop+0xeb/0xf0
[   20.475697]  do_syscall_64+0x1c8/0x1f0
[   20.479190]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   20.480880] RIP: 0033:0x7f6318c9bd77
[   20.482341] Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d f1 00 2b 00 f7 d8 64 89 01 48
[   20.487088] RSP: 002b:00007ffeb69f34b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[   20.489270] RAX: 0000000000000000 RBX: 000055e86e241060 RCX: 00007f6318c9bd77
[   20.491359] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000055e86e241240
[   20.493444] RBP: 000055e86e241240 R08: 000055e86e2425e0 R09: 0000000000000014
[   20.495482] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007f631919de64
[   20.497496] R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffeb69f3740
[   20.499472] ---[ end trace fedf2c5128b96899 ]---


To reproduce:

        # build kernel
	cd linux
	cp config-5.6.0-11895-gb78356484793c .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-5.6.0-11895-gb78356484793c" of type "text/plain" (202325 bytes)

View attachment "job-script" of type "text/plain" (5574 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (19728 bytes)

View attachment "xfstests" of type "text/plain" (1903 bytes)

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