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Re: [Qemu-devel] [PATCH v6 0/3] linux-aio: introduce submit I/O asa batc
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From: |
Fam Zheng |
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Subject: |
Re: [Qemu-devel] [PATCH v6 0/3] linux-aio: introduce submit I/O asa batch |
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Date: |
Tue, 26 Aug 2014 15:45:50 +0800 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Tue, 08/26 15:31, Zhang Haoyu wrote:
> Can we use the queued io data as caches,
> io write will directly return and tell the guest the io is completed after
> the io is enqueued,
> better user experience for burst io,
> and io-read will firstly search the io queue, if matched data found, directly
> get the data from the queue,
> if not, then read the data from the disk or host page cache.
> Any ideas?
Guest kernel already has a page cache that exactly does this, also keeping a
copy of guest request data in qemu may hurt the bandwidth in some cases.
Fam