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From: ching <lsching17@gmail.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] linux aio and cache mode
Date: Mon, 24 Sep 2012 19:32:46 +0800	[thread overview]
Message-ID: <506044DE.9060701@gmail.com> (raw)

Hi all,

My host is qemu-1.1.1 and x64 kernel 3.5.4. The guest is using aio="native"

I am trying to use unsafe cache mode to boost i/o performance.

After googling a while, there are some old web page telling that linux native aio do not use host cache. (http://stackoverflow.com/questions/5664105/buffered-asynchronous-file-i-o-on-linux)

is it still valid for recent kernel? do i need to change to aio="threads" to take advantage of unsafe cache mode?

Thanks in advance.

Regards,
ching

             reply	other threads:[~2012-09-24 11:32 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-24 11:32 ching [this message]
2012-09-24 12:30 ` [Qemu-devel] linux aio and cache mode Kevin Wolf
2012-09-24 22:40   ` ching
2012-09-25 13:33     ` Kevin Wolf
2012-09-25 23:22       ` ching
2012-09-26  7:51         ` Kevin Wolf
2012-09-28  0:00           ` ching

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