On Mon, Feb 20, 2012 at 03:06:48PM +0900, Guk-Bong, Kwon wrote: > [help] xfs quotacheck problem when xfs filesystem mount > > hi all.. > > i test xfs project quota with various version vanilla kernel > > > Test Scenario > > 1. mkfs.xfs -i size=512 -l lazy-count=1 /dev/ld/lv1 > 2. xfs filesystem mount with project quota. and setting project quota > 3. make many file into xfs filesystem (eg. 1K~1M size, number 300 million over) > 4. xfs filesystem umount > 5. xfs filesystem mount without project quota > 6. make some file > 7. umount xfs filesystem > 8. again mount with project quota > > > some kernel is ok when mount with project quota > > some kernel is occurs oom-killer when mount with project quota > > i tested kernel version 2.6.27.59, 2.6.32.46, 3.1.10. > > only 2.6.27.59 kernel is not occurs oom-killer. Hmmm. I thought we fixed that problem. Indeed: $ glo -n 1 704b290 704b290 xfs: register the inode cache shrinker before quotachecks $ git describe --contains 704b290 v2.6.39-rc1~15^2~1 So it was fixed in 2.6.39. Why is 3.1 seeing this problem? Oh: $ glo -n 1 8daaa83 8daaa83 xfs: make use of new shrinker callout for the inode cache Which makes XFS use the superblock shrinker infrastructure seems to be causing the problem. quotacheck is called during xfs_fs_fill_super(), which is called with the sb->s_umount locked in exclusive mode, and the shrinker (prune_super()) needs to get the lock in shared mode to run. Hence the shrinker doesn't run while quotacheck is in progress. I'll have to think about this one for a bit - I'm not sure what the best way to solve it is yet. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
