Updating kernel versions has improved many Ceph-related things for me. I don't use CentOS, but at a glance I see that you can get newer kernels via "Elrepo". I would seriously consider doing so. Even sticking with an LTS kernel, you can still get much newer kernels (up to 5.4.75). (https://www.kernel.org/). This is likely to make a difference to Ceph performance. On Mon, Nov 9, 2020 at 1:21 PM Frédéric Nass <frederic.nass@xxxxxxxxxxxxxxxx> wrote: > > I feel lucky to have you on this one. ;-) Do you mean applying a > specific patch on 3.10 kernel? Or is this one too old to have it working > anyways. > > Frédéric. > > Le 09/11/2020 à 19:07, Luis Henriques a écrit : > > Frédéric Nass <frederic.nass@xxxxxxxxxxxxxxxx> writes: > > > >> Hi Luis, > >> > >> Thanks for your help. Sorry I forgot about the kernel details. This is latest > >> RHEL 7.9. > >> > >> ~/ uname -r > >> 3.10.0-1160.2.2.el7.x86_64 > >> > >> ~/ grep CONFIG_TMPFS_XATTR /boot/config-3.10.0-1160.2.2.el7.x86_64 > >> CONFIG_TMPFS_XATTR=y > >> > >> upper directory /upperdir is using xattrs > >> > >> ~/ ls -l /dev/mapper/vg0-racine > >> lrwxrwxrwx 1 root root 7 6 mars 2020 /dev/mapper/vg0-racine -> ../dm-0 > >> > >> ~/ cat /proc/fs/ext4/dm-0/options | grep xattr > >> user_xattr > >> > >> ~/ setfattr -n user.name -v upperdir /upperdir > >> > >> ~/ getfattr -n user.name /upperdir > >> getfattr: Suppression des « / » en tête des chemins absolus > >> # file: upperdir > >> user.name="upperdir" > >> > >> Are you able to modify the content of a snapshot directory using overlayfs on > >> your side? > > [ Cc'ing Jeff ] > > > > Yes, I'm able to do that using a *recent* kernel. I got curious and after > > some digging I managed to reproduce the issue with kernel 5.3. The > > culprit was commit e09580b343aa ("ceph: don't list vxattrs in > > listxattr()"), in 5.4. > > > > Getting a bit more into the whole rabbit hole, it looks like > > ovl_copy_xattr() will try to copy all the ceph-related vxattrs. And that > > won't work (for ex. for ceph.dir.entries). > > > > Can you try cherry-picking this commit into your kernel to see if that > > fixes it for you? > > > > Cheers, > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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