On Thu, 2015-11-26 at 07:52 +0000, Межов Игорь Александрович wrote: > Hi! > > >After our trouble with ext4/xattr soft lockup kernel bug we started > >moving some of our OSD to XFS, we're using ubuntu 14.04 3.19 kernel > >and ceph 0.94.5. > > It was a rather serious bug, but there is small a patch at kernel.org > > https://bugzilla.kernel.org/show_bug.cgi?id=107301 > https://bugzilla.kernel.org/attachment.cgi?id=192351 > > We also have this problem on both 3.16 (Jessie) and 4.2 (Sid) Debian kernels, > but, after applying this patch, the problem is gone. There was no hangs/lockups > during last week. Patch is for 3.18 kernel (I think), but it is easy to manually port > it to 4.2 - ext4 code do not change too much. > > > Megov Igor > CIO, Yuterra > Hi, I wrote the patch in the bugzilla for 3.19 (ubuntu trusty sources), the patch I submitted against the current Linus kernel tree is here (only mechanical changes): http://marc.info/?l=linux-ext4&m=144801312605200&w=2 The kernel developpers have not proposed any solution but don't want to accept my patch, I will continue to work on this on my spare time (not a lot currently), but ceph users of ext4 for any kernel must install it otherwise they'll be in lots of trouble. Also I forgot to ask about XFS and inode size: http://xfs.org/docs/xfsdocs-xml-dev/XFS_User_Guide/tmp/en-US/html/ch04s05.html Should we use "mkfs.xfs -i size=512" now for ceph volumes? Thanks in advance, Laurent _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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