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From: | Anthony Liguori |
Subject: | [Qemu-devel] Re: [PATCH 02/10] Add buffered_file_internal constant |
Date: | Tue, 30 Nov 2010 08:22:09 -0600 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.15) Gecko/20101027 Lightning/1.0b1 Thunderbird/3.0.10 |
On 11/30/2010 08:11 AM, Michael S. Tsirkin wrote:
On Tue, Nov 30, 2010 at 08:02:56AM -0600, Anthony Liguori wrote:If we're burning excess CPU walking a 100MB bitmap, then let's fix that problem. Stopping every 1MB worth of the bitmap to do other work just papers over the real problem (that we're walking 100MB bitmap).Just using a bit per page will already make the problem 8x smaller, won't it? Is that enough to avoid the need for a new kernel interface?
I don't know, but it's definitely a good thing to try. Regards, Anthony Liguori
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