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[Qemu-devel] Re: [PATCH v2 6/7] qed: Read/write support


From: Avi Kivity
Subject: [Qemu-devel] Re: [PATCH v2 6/7] qed: Read/write support
Date: Tue, 12 Oct 2010 18:21:19 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100921 Fedora/3.1.4-1.fc13 Lightning/1.0b3pre Thunderbird/3.1.4

 On 10/12/2010 06:16 PM, Anthony Liguori wrote:

It's fairly simple to add a sync to this path. It's probably worth checking the prefill/postfill for zeros and avoiding the write/sync if that's the case. That should optimize the common cases of allocating new space within a file.

My intuition is that we can avoid the sync entirely but we'll need to think about it further.


I don't think so. This isn't a guest initiated write so we can't shift responsibility to the guest.

--
error compiling committee.c: too many arguments to function




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