Hi All,
I am having an issue with an XFS filesystem shutting down under high load with very many small files.
Basically, I have around 3.5 - 4 million files on this filesystem. New files are being written to the FS all the
time, until I get to 9-11 mln small files (35k on average).
at some point I get the following in dmesg:
[2870477.695512] Filesystem "sda5": XFS internal error xfs_trans_cancel at line 1138 of file fs/xfs/xfs_trans.c.
Caller 0xffffffff8826bb7d
[2870477.695558]
[2870477.695559] Call Trace:
[2870477.695611] [<ffffffff88262c28>] :xfs:xfs_trans_cancel+0x5b/0xfe
[2870477.695643] [<ffffffff8826bb7d>] :xfs:xfs_mkdir+0x57c/0x5d7
[2870477.695673] [<ffffffff8822f3f8>] :xfs:xfs_attr_get+0xbf/0xd2
[2870477.695707] [<ffffffff88273326>] :xfs:xfs_vn_mknod+0x1e1/0x3bb
[2870477.695726] [<ffffffff80264929>] _spin_lock_irqsave+0x9/0x14
[2870477.695736] [<ffffffff802230e6>] __up_read+0x19/0x7f
[2870477.695764] [<ffffffff8824f8f4>] :xfs:xfs_iunlock+0x57/0x79
[2870477.695776] [<ffffffff80264929>] _spin_lock_irqsave+0x9/0x14
[2870477.695784] [<ffffffff802230e6>] __up_read+0x19/0x7f
[2870477.695791] [<ffffffff80209f4c>] __d_lookup+0xb0/0xff
[2870477.695803] [<ffffffff8020cd4a>] _atomic_dec_and_lock+0x39/0x57
[2870477.695814] [<ffffffff8022d6db>] mntput_no_expire+0x19/0x89
[2870477.695829] [<ffffffff80264929>] _spin_lock_irqsave+0x9/0x14
[2870477.695837] [<ffffffff802230e6>] __up_read+0x19/0x7f
[2870477.695861] [<ffffffff8824f8f4>] :xfs:xfs_iunlock+0x57/0x79
[2870477.695887] [<ffffffff882680af>] :xfs:xfs_access+0x3d/0x46
[2870477.695899] [<ffffffff80264929>] _spin_lock_irqsave+0x9/0x14
[2870477.695923] [<ffffffff802df4a3>] vfs_mkdir+0xe3/0x152
[2870477.695933] [<ffffffff802dfa79>] sys_mkdirat+0xa3/0xe4
[2870477.695953] [<ffffffff80260295>] tracesys+0x47/0xb6
[2870477.695963] [<ffffffff802602f9>] tracesys+0xab/0xb6
[2870477.695977]
[2870477.695985] xfs_force_shutdown(sda5,0x8) called from line 1139 of file fs/xfs/xfs_trans.c. Return address =
0xffffffff88262c46
[2870477.696452] Filesystem "sda5": Corruption of in-memory data detected. Shutting down filesystem: sda5
[2870477.696464] Please umount the filesystem, and rectify the problem(s)
# ls -l /store
ls: /store: Input/output error
?--------- 0 root root 0 Jan 1 1970 /store
Filesystems is ~1T in size
# df -hT /store
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda5 xfs 910G 142G 769G 16% /store
Using CentOS 5.9 with kernel 2.6.18-348.el5xen
The filesystem is in a virtual machine (Xen) and on top of LVM.
Filesystem was created using mkfs.xfs defaults with xfsprogs-2.9.4-1.el5.centos (that's the one that comes with
CentOS 5.x by default.)
These are the defaults with which the filesystem was created:
# xfs_info /store
meta-data=/dev/sda5 isize=256 agcount=32, agsize=7454720 blks
= sectsz=512 attr=0
data = bsize=4096 blocks=238551040, imaxpct=25
= sunit=0 swidth=0 blks, unwritten=1
naming =version 2 bsize=4096
log =internal bsize=4096 blocks=32768, version=1
= sectsz=512 sunit=0 blks, lazy-count=0
realtime =none extsz=4096 blocks=0, rtextents=0
The problem is reproducible and I don't think it's hardware related. The problem was reproduced on multiple
servers of the same type. So, I doubt it's a memory issue or something like that.
Is that a known issue? If it is then what's the fix? I went through the kernel updates for CentOS 5.10 (newer
kernel), but didn't see any xfs related fixes since CentOS 5.9
Any help will be greatly appreciated...
--
"If we really understand the problem, the answer will come out of it,
because the answer is not separate from the problem."
- Krishnamurti
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