Hi,
all the best in 2017!
I've got reproducible bug testing bcachefs:
[ 9807.622253] BUG: unable to handle kernel paging request at
ffffc90006c53000
[ 9807.622310] IP: [<ffffffff812bf074>] lz4_compress+0x4e4/0x830
[ 9807.622345] PGD 9c82e067 PUD 9c82f067 PMD 2d4f6067 PTE 0
[ 9807.622383] Oops: 0002 [#1] SMP
[ 9807.622408] Modules linked in: cpufreq_ondemand msr af_packet bridge
stp llc fuse xfs coretemp hwmon kvm_intel r8188eu(C) kvm hpsa irqbypass
snd_pcsp cfg8
0211 i2c_i801 snd_pcm i2c_smbus sky2 i2c_core scsi_transport_sas
snd_timer snd rfkill soundcore button pcrypt nf_nat_ftp nf_conntrack_ftp
nf_nat nf_conntrack
ipv6 acpi_cpufreq processor raid1 md_mod pata_jmicron ehci_pci ehci_hcd
dm_mod
[ 9807.622648] CPU: 1 PID: 6560 Comm: rsync Tainted: G C
4.8.0+ #2
[ 9807.622680] Hardware name: Gigabyte Technology Co., Ltd.
965P-DS3/965P-DS3, BIOS F14 06/25/2009
[ 9807.622727] task: ffff880069d63600 task.stack: ffff880069d68000
[ 9807.622756] RIP: 0010:[<ffffffff812bf074>] [<ffffffff812bf074>]
lz4_compress+0x4e4/0x830
[ 9807.622806] RSP: 0018:ffff880069d6b8a0 EFLAGS: 00010296
[ 9807.622833] RAX: ffffc90006c63ef9 RBX: ffffc90006c54000 RCX:
ffffc90006c53001
[ 9807.622864] RDX: ffffc90006c63ecc RSI: ffffc90006c63f00 RDI:
ffffc90006c52ffa
[ 9807.622894] RBP: ffff880069d6b8f8 R08: ffffc90006c63ff3 R09:
ffffc90006c43000
[ 9807.622924] R10: ffffc90006c53000 R11: 0000000000000000 R12:
ffffc90006c63ff4
[ 9807.622955] R13: ffff880031220000 R14: ffffc90006c63ff7 R15:
ffffc90006c43100
[ 9807.622985] FS: 00007f60acdcb700(0000) GS:ffff88009fc80000(0000)
knlGS:0000000000000000
[ 9807.623032] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 9807.623060] CR2: ffffc90006c53000 CR3: 00000000779a6000 CR4:
00000000000006e0
[ 9807.623090] Stack:
[ 9807.623111] ffffc90006c43000 ffffc90006c64000 ffffc90006c63ffa
ffffc90006c63ff9
[ 9807.623164] 0000000000010000 ffff880069d6ba90 ffff8800779d0000
ffff880069d6ba90
[ 9807.623219] ffff880069d6ba98 ffff880031220000 ffff880097a7fe20
ffff880069d6b9d0
[ 9807.623273] Call Trace:
[ 9807.629620] [<ffffffff813f5f43>] __bio_compress+0x2c3/0x3c0
[ 9807.629650] [<ffffffff812b7123>] ? crc32c+0x63/0x90
[ 9807.629677] [<ffffffff813f639c>] bch_bio_compress+0xac/0xc0
[ 9807.629706] [<ffffffff8140a7df>] __bch_write+0x3ff/0x7f0
[ 9807.629734] [<ffffffff8140ac55>] bch_write+0x85/0x3d0
[ 9807.629762] [<ffffffff81404df7>] bch_writepage_do_io+0x57/0x80
[ 9807.629792] [<ffffffff81407bae>] bch_writepages+0x2be/0x530
[ 9807.629821] [<ffffffff8110cc26>] ? __find_get_pages+0x136/0x370
[ 9807.629852] [<ffffffff812a01e3>] ? radix_tree_lookup_slot+0x13/0x30
[ 9807.629882] [<ffffffff811198fc>] do_writepages+0x1c/0x30
[ 9807.629910] [<ffffffff8110d5f5>]
__filemap_fdatawrite_range+0xa5/0xe0
[ 9807.629941] [<ffffffff8110d74c>]
filemap_write_and_wait_range+0x3c/0x90
[ 9807.629971] [<ffffffff81408a41>] bch_truncate+0x1f1/0x230
[ 9807.630000] [<ffffffff81402573>] bch_setattr+0x93/0xa0
[ 9807.630029] [<ffffffff81190cc7>] notify_change+0x247/0x400
[ 9807.630059] [<ffffffff81172b7a>] do_truncate+0x5a/0x90
[ 9807.630088] [<ffffffff81172e43>]
do_sys_ftruncate.constprop.18+0xe3/0x100
[ 9807.630119] [<ffffffff81172e89>] SyS_ftruncate+0x9/0x10
[ 9807.630148] [<ffffffff814fcedf>] entry_SYSCALL_64_fastpath+0x17/0x93
[ 9807.630177] Code: fa 0f 82 66 fe ff ff 41 83 fb 0e 0f 87 35 02 00 00
41 c1 e3 04 48 01 cf 45 88 19 48 39 cf 76 14 4c 8b 1e 48 83 c1 08 48 83
c6 08 <4c> 89 59 f8 48 39 cf 77 ec 49 89 c3 48 89 d0 48 8d 77 02 4c 89
[ 9807.630404] RIP [<ffffffff812bf074>] lz4_compress+0x4e4/0x830
[ 9807.630435] RSP <ffff880069d6b8a0>
[ 9807.630459] CR2: ffffc90006c53000
[ 9807.630759] ---[ end trace 6a05632b1eded47f ]---
Workload is simple, I'm just copying small and huge files using rsync.
Commit:
commit 288a107052bd9ce13351dd7bf877537a8c430a6f
Author: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Date: Fri Dec 23 18:09:18 2016 -0900
bcache: fix run_cache_set error handling
Marcin
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