> For a long time I'm bitten by a bad interaction > of mount -o remount,ro and quota operations. > > The sequence is as follows: > > mount /fs > quotaon -ug /fs > mount -o remount,ro /fs > umount /fs > > At this point, umount never returns. /proc/$pid/wchan > shows vfs_quota_off: > > Feb 6 20:53:25 linux kernel: umount D e5183eb8 0 8646 1 > Feb 6 20:53:25 linux kernel: e5183ecc 00000086 00000002 e5183eb8 > e5183eb0 00000000 c1db2540 c1db2684 > Feb 6 20:53:25 linux kernel: c1db2684 c1c0dd00 00000000 cfd9f1c0 > c0367080 c0367080 f5849000 f7f06880 > Feb 6 20:53:25 linux kernel: f7e89d80 00000000 c0367080 b7c9795c > 005f3997 00000000 000000ff 00000000 > Feb 6 20:53:25 linux kernel: Call Trace: > Feb 6 20:53:25 linux kernel: [<c01a2a65>] vfs_quota_off+0x345/0x490 > Feb 6 20:53:25 linux kernel: [<c013a3a0>] autoremove_wake_function+0x0/0x50 > Feb 6 20:53:25 linux kernel: [<c0174bf6>] deactivate_super+0x46/0x80 > Feb 6 20:53:25 linux kernel: [<c0188bba>] sys_umount+0x4a/0x240 > Feb 6 20:53:25 linux kernel: [<c017637f>] sys_stat64+0xf/0x30 > Feb 6 20:53:25 linux kernel: [<c0162069>] remove_vma+0x39/0x50 > Feb 6 20:53:25 linux kernel: [<c0162b67>] do_munmap+0x197/0x1f0 > Feb 6 20:53:25 linux kernel: [<c0188dc5>] sys_oldumount+0x15/0x20 > Feb 6 20:53:25 linux kernel: [<c010417e>] sysenter_past_esp+0x5f/0x85 > > The filesystem is ext3. The issue is here for a long time, > at least since before 2.6.20, and is still present in 2.6.23 > (I'll try 2.6.24 later today). > > Can it be fixed please? :) Of course, thanks for report :). The problem is we allow remounting read only which we should refuse when quota is enabled. I'll fix that in a minute.
Honza -- Jan Kara <[EMAIL PROTECTED]> SuSE CR Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/