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[Xen-devel] Re: [PATCH 1/3] xen/blk[front|back]: Use the full FLUSH | FU

from [Christoph Hellwig] [Permanent Link][Original]

To:	Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject:	[Xen-devel] Re: [PATCH 1/3] xen/blk[front\|back]: Use the full FLUSH \| FUA instead of just FLUSH.
From:	Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date:	2011年9月10日 14:08:49 -0400
Cc:	axboe@xxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, JBeulich@xxxxxxxxxx, jeremy.fitzhardinge@xxxxxxxxxx
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On Fri, Sep 09, 2011 at 02:30:59PM -0400, Konrad Rzeszutek Wilk wrote:
> During a FLUSH we can pass sector number that we want to
> have flushed - which is what FUA requests are.
No, that is not the case.
REQ_FLUSH without data -> pure flush
REQ_FLUSH with data -> preflush plus write
REQ_FUA -> write and ranged postflush
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[Xen-devel] [PATCH] xen-blk[front\|back] FUA additions. , Konrad Rzeszutek Wilk [Xen-devel] [PATCH 1/3] xen/blk[front\|back]: Use the full FLUSH \| FUA instead of just FLUSH. , Konrad Rzeszutek Wilk [Xen-devel] Re: [PATCH 1/3] xen/blk[front\|back]: Use the full FLUSH \| FUA instead of just FLUSH., Christoph Hellwig <= [Xen-devel] Re: [PATCH 1/3] xen/blk[front\|back]: Use the full FLUSH \| FUA instead of just FLUSH. , Konrad Rzeszutek Wilk [Xen-devel] [PATCH 3/3] xen-blkfront: If no barrier or flush is supported, use invalid operation. , Konrad Rzeszutek Wilk [Xen-devel] Re: [PATCH 3/3] xen-blkfront: If no barrier or flush is supported, use invalid operation. , Jan Beulich Re: [Xen-devel] Re: [PATCH 3/3] xen-blkfront: If no barrier or flush is supported, use invalid operation. , Konrad Rzeszutek Wilk Re: [Xen-devel] Re: [PATCH 3/3] xen-blkfront: If no barrier or flush is supported, use invalid operation. , Jan Beulich

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