Hi all,
I am currently testing/benchmarking xfs on top of a bcache. When I run a heavy
IO workload (fio with 64 threads, read/write) on the device for ~30-45min I get
[ 9092.978268] XFS (bcache1): xlog_write: reservation summary:
[ 9092.978268] trans type = (null) (42)
[ 9092.978268] unit res = 18730384 bytes
[ 9092.978268] current res = -1640 bytes
[ 9092.978268] total reg = 512 bytes (o/flow = 1163749592 bytes)
[ 9092.978268] ophdrs = 655304 (ophdr space = 7863648 bytes)
[ 9092.978268] ophdr + reg = 1171613752 bytes
[ 9092.978268] num regions = 2
[ 9092.978268]
[ 9092.978272] XFS (bcache1): region[0]: LR header - 512 bytes
[ 9092.978273] XFS (bcache1): region[1]: commit - 0 bytes
[ 9092.978274] XFS (bcache1): xlog_write: reservation ran out. Need to up reservation
[ 9092.978303] XFS (bcache1): xfs_do_force_shutdown(0x2) called from line 2036 of file fs/xfs/xfs_log.c. Return address = 0xffffffffa04433c8
[ 9092.979189] XFS (bcache1): Log I/O Error Detected. Shutting down filesystem
[ 9092.979210] XFS (bcache1): Please umount the filesystem and rectify the problem(s)
[ 9092.979238] XFS (bcache1): xfs_do_force_shutdown(0x2) called from line 1497 of file fs/xfs/xfs_log.c. Return address = 0xffffffffa0443b57
[ 9093.183869] XFS (bcache1): xfs_log_force: error 5 returned.
[ 9093.489944] XFS (bcache1): xfs_log_force: error 5 returned.
Kernel is 3.16.1 but this also happens with Ubuntu 3.13.0.34.
With the bcache the fio puts ~30k IOps on the filesystem.
xfs_info:
meta-data=/dev/bcache1 isize=256 agcount=8, agsize=268435455 blks
= sectsz=512 attr=2
data = bsize=4096 blocks=1949957886, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=521728, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
umount/mount recovers the fs and the fs seems ok.
I can reproduce this behavior. Is there anything I could try to debug
this?
Regards
Thomas
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