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Re: [Qemu-devel] [RFC 00/13] aio: drop io_flush()

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [RFC 00/13] aio: drop io_flush()
Date: Fri, 12 Apr 2013 12:27:05 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4

Il 12/04/2013 12:04, Kevin Wolf ha scritto:
> Or actually, if you want to avoid .bdrv_drain for now, the patch that I
> started when I thought a bit about this, had a default .bdrv_drain
> implementation that just forwarded the request to bs->file if it wasn't
> implemented by a block driver. For the QED case, this would work.

It's similar to bdrv_co_flush.  Drain bs first, then bs->backing_hd
(this is not needed in bdrv_co_flush), then bs->file, then the driver
can do it on other files.


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