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From: | Paolo Bonzini |
Subject: | Re: [Qemu-devel] [PATCH] Block: don't do copy-on-read in before_write_notifier |
Date: | Tue, 18 Aug 2015 22:41:40 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 |
On 18/08/2015 19:54, Wen Congyang wrote: > We will copy data in before_write_notifier to do backup. > It is a nested I/O request, so we cannot do copy-on-read. Can you explain why? What is the bug that this is fixing? Paolo > Signed-off-by: Wen Congyang <address@hidden>
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