FYI, we noticed the below changes on https://github.com/0day-ci/linux Jaegeuk-Kim/f2fs-give-scheduling-point-in-shrinking-path/20160124-041951 commit 2ba2b464913ebb966a17d87c367957ce22e3900f ("f2fs: use wait_for_stable_page to avoid contention") +------------------------------------------+------------+------------+ | | 60f643da13 | 2ba2b46491 | +------------------------------------------+------------+------------+ | boot_successes | 16 | 7 | | boot_failures | 0 | 10 | | kernel_BUG_at_fs/f2fs/data.c | 0 | 10 | | invalid_opcode:#[##]SMP | 0 | 10 | | RIP:f2fs_write_cache_pages[f2fs] | 0 | 10 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 10 | | backtrace:vfs_fsync_range | 0 | 10 | | backtrace:SyS_msync | 0 | 10 | +------------------------------------------+------------+------------+ [ 23.358483] device-mapper: ioctl: 4.34.0-ioctl (2015-10-28) initialised: dm-devel@redhat.com [ 35.093574] run fstests generic/127 at 2016-02-02 20:45:49 [ 103.429424] ------------[ cut here ]------------ [ 103.434881] kernel BUG at fs/f2fs/data.c:1291! [ 103.441544] invalid opcode: 0000 [#1] SMP [ 103.446527] Modules linked in: dm_mod f2fs rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver netconsole btrfs xor raid6_pq sg sd_mod snd_hda_codec_hdmi ata_generic snd_hda_codec_realtek snd_hda_codec_generic pata_acpi x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel i915 snd_hda_intel eeepc_wmi snd_hda_codec drm_kms_helper syscopyarea sysfillrect sysimgblt snd_hda_core fb_sys_fops snd_hwdep asus_wmi sparse_keymap snd_pcm rfkill ppdev pata_via aesni_intel lrw gf128mul pcspkr serio_raw ata_piix drm snd_timer glue_helper ablk_helper cryptd snd soundcore libata shpchp wmi parport_pc parport tpm_infineon video [ 103.513212] CPU: 0 PID: 1138 Comm: fsx Not tainted 4.4.0-05596-g2ba2b46 #5 [ 103.521183] Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 1002 04/01/2011 [ 103.531445] task: ffff880198088000 ti: ffff880196934000 task.ti: ffff880196934000 [ 103.540085] RIP: 0010:[] [] f2fs_write_cache_pages+0x341/0x4b0 [f2fs] [ 103.552105] RSP: 0018:ffff880196937c00 EFLAGS: 00010202 [ 103.558632] RAX: 002fffff8000287d RBX: ffff880196937c48 RCX: ffffea000652d500 [ 103.566996] RDX: 0000000000000001 RSI: ffff8801a51728e0 RDI: ffff88007f594000 [ 103.575367] RBP: ffff880196937cf0 R08: 0000000000000000 R09: 0000000000000001 [ 103.583749] R10: 0000000000000100 R11: 0000000000000230 R12: ffffea000652cb80 [ 103.592137] R13: 000000000000001b R14: 0000000000000010 R15: ffff88007f594168 [ 103.600520] FS: 00007fdbae864700(0000) GS:ffff8801bfa00000(0000) knlGS:0000000000000000 [ 103.609887] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.616925] CR2: 00007fdbae7e0000 CR3: 0000000196aca000 CR4: 00000000000406f0 [ 103.625374] Stack: [ 103.628703] 0000000000000000 0000000000000000 ffff88007f594168 0100000000000001 [ 103.637542] ffff880100000000 ffff880196937d50 0000000100000002 ffff880196937ca0 [ 103.646469] 000000000000001c 000000000000000c 0000000000000000 ffffea000652cb80 [ 103.655327] Call Trace: [ 103.659155] [] ? __might_sleep+0x52/0xb0 [ 103.666125] [] f2fs_write_data_pages+0x13b/0x220 [f2fs] [ 103.674415] [] do_writepages+0x1e/0x30 [ 103.681227] [] __filemap_fdatawrite_range+0xaa/0xf0 [ 103.689173] [] filemap_write_and_wait_range+0x2a/0x70 [ 103.697314] [] f2fs_sync_file+0xc4/0x5d0 [f2fs] [ 103.704946] [] vfs_fsync_range+0x3d/0xb0 [ 103.711985] [] SyS_msync+0x174/0x1f0 [ 103.718675] [] entry_SYSCALL_64_fastpath+0x12/0x71 [ 103.726595] Code: 5e 41 5f 5d c3 4c 89 e7 e8 4d 07 be e0 e9 d0 fe ff ff 31 d2 31 f6 4c 89 e7 e8 fc c6 00 00 49 8b 04 24 f6 c4 20 0f 84 f3 fe ff ff <0f> 0b 4c 89 b5 48 ff ff ff 8b bd 58 ff ff ff 45 31 e4 0f b6 9d [ 103.750281] RIP [] f2fs_write_cache_pages+0x341/0x4b0 [f2fs] [ 103.760394] RSP [ 103.765595] ---[ end trace b6a4883188defa03 ]--- [ 103.766285] systemd-journald[127]: Compressed data object 673 -> 504 To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Kernel Test Robot