On Thu, Jul 30, 2015 at 10:29 AM, Z Zhang <zhangz.david@xxxxxxxxxxx> wrote:
>
> ________________________________
> Subject: Re: which kernel version can help avoid kernel client
> deadlock
> From: chaofanyu@xxxxxxxxxxx
> Date: Thu, 30 Jul 2015 13:16:16 +0800
> CC: idryomov@xxxxxxxxx; ceph-users@xxxxxxxxxxxxxx
> To: zhangz.david@xxxxxxxxxxx
>
>
> On Jul 30, 2015, at 12:48 PM, Z Zhang <zhangz.david@xxxxxxxxxxx> wrote:
>
> We also hit the similar issue from time to time on centos with 3.10.x
> kernel. By iostat, we can see kernel rbd client's util is 100%, but no r/w
> io, and we can't umount/unmap this rbd client. After restarting OSDs, it
> will become normal.
3.10.x is rather vague, what is the exact version you saw this on? Can you
provide syslog logs (I'm interested in dmesg)?
Thanks,
Ilya
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