From: Paolo Bonzini <pbonzini@redhat.com>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Vijay Bellur <vbellur@redhat.com>,
Amar Tumballi <amarts@redhat.com>,
qemu-devel@nongnu.org, bharata@linux.vnet.ibm.com
Subject: Re: [Qemu-devel] [RFC PATCH 3/3] block: gluster as block backend
Date: Sun, 01 Jul 2012 16:50:29 +0200 [thread overview]
Message-ID: <4FF063B5.3090309@redhat.com> (raw)
In-Reply-To: <CAJSP0QUbYKPqtpz8VreM_VRkLnB7dTVKzs2Sc=AZxmvXnGibFw@mail.gmail.com>
Il 19/06/2012 13:05, Stefan Hajnoczi ha scritto:
>> > I picked up this logic from block/raw-posix.c:raw_open_common(). Don't see
>> > anything related to bs->enable_write_cache there. Will find out more about
>> > bs->enable_write_cache.
> If you fetch the latest qemu.git and check bdrv_open_common() there is
> new code that stashes BDRV_O_CACHE_WB in bs->enable_write_cache and
> then opens the actual block driver with BDRV_O_CACHE_WB set. You can
> use bdrv_enable_write_cache() to test the original flag.
Yes, but you shouldn't do this when opening. You should always open for
writeback.
Paolo
next prev parent reply other threads:[~2012-07-01 14:50 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-11 14:18 [Qemu-devel] [RFC PATCH 0/3] GlusterFS support in QEMU Bharata B Rao
2012-06-11 14:19 ` [Qemu-devel] [RFC PATCH 1/3] qemu: Add a config option for GlusterFS as block backend Bharata B Rao
2012-06-11 14:20 ` [Qemu-devel] [RFC PATCH 2/3] block: GlusterFS helpers to interface with libglusterfs Bharata B Rao
2012-06-18 17:35 ` Stefan Hajnoczi
2012-06-19 9:31 ` Bharata B Rao
2012-07-02 9:52 ` Paolo Bonzini
2012-07-02 10:05 ` Bharata B Rao
2012-06-11 14:21 ` [Qemu-devel] [RFC PATCH 3/3] block: gluster as block backend Bharata B Rao
2012-06-18 17:35 ` Stefan Hajnoczi
2012-06-19 9:27 ` Avi Kivity
2012-06-19 9:30 ` Bharata B Rao
2012-06-19 11:05 ` Stefan Hajnoczi
2012-07-01 14:50 ` Paolo Bonzini [this message]
2012-07-01 14:49 ` Paolo Bonzini
2012-06-18 15:36 ` [Qemu-devel] [RFC PATCH 0/3] GlusterFS support in QEMU Stefan Hajnoczi
2012-06-19 9:10 ` Bharata B Rao
2012-07-06 5:35 ` Bharata B Rao
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