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Re: [Qemu-devel] [ceph-users] rbd cache + libvirt
From: |
Andrey Korolyov |
Subject: |
Re: [Qemu-devel] [ceph-users] rbd cache + libvirt |
Date: |
Mon, 8 Jun 2015 19:49:15 +0300 |
On Mon, Jun 8, 2015 at 6:50 PM, Jason Dillaman <address@hidden> wrote:
> Hmm ... looking at the latest version of QEMU, it appears that the RBD cache
> settings are changed prior to reading the configuration file instead of
> overriding the value after the configuration file has been read [1]. Try
> specifying the path to a new configuration file via the
> "conf=/path/to/my/new/ceph.conf" QEMU parameter where the RBD cache is
> explicitly disabled [2].
>
>
> [1]
> http://git.qemu.org/?p=qemu.git;a=blob;f=block/rbd.c;h=fbe87e035b12aab2e96093922a83a3545738b68f;hb=HEAD#l478
> [2] http://ceph.com/docs/master/rbd/qemu-rbd/#usage
>
Actually the mentioned snippet presumes *expected* behavior with
cache=xxx driving the overall cache behavior. Probably the pass itself
(from cache=none to proper bitmask values in a backend properties) is
broken in some way.
CCing qemu-devel for possible bug.
- Re: [Qemu-devel] [ceph-users] rbd cache + libvirt,
Andrey Korolyov <=