Re: [Qemu-devel] [PATCH v2] sheepdog: implement direct write semantics

[Kevin Wolf <kwolf@redhat.com>]

Am 11.01.2013 08:35, schrieb MORITA Kazutaka:
> At Thu, 10 Jan 2013 16:03:47 +0800,
> Liu Yuan wrote:
>>
>> From: Liu Yuan <tailai.ly@taobao.com>
>>
>> Sheepdog supports both writeback/writethrough write but has not yet supported
>> DIRECTIO semantics which bypass the cache completely even if Sheepdog daemon is
>> set up with cache enabled.
>>
>> Suppose cache is enabled on Sheepdog daemon size, the new cache control is
>>
>> cache=writeback # enable the writeback semantics for write
>> cache=writethrough # enable the emulated writethrough semantics for write
>> cache=directsync # disable cache competely
>>
>> Guest WCE toggling on the run time to toggle writeback/writethrough is also
>> supported.
>>
>> Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
>> Cc: Kevin Wolf <kwolf@redhat.com>
>> Cc: Stefan Hajnoczi <stefanha@gmail.com>
>> Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
>> ---
>>  v2: adopt to current emulated writethrough cache setting
>>
>>  block/sheepdog.c |   70 +++++++++++++++++++++++++++++++-----------------------
>>  1 file changed, 40 insertions(+), 30 deletions(-)
> 
> Reviewed-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>

Thanks, applied to the block branch.

Kevin