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Re: [Qemu-devel] [PATCH] COLO-compare: Add compare_lock aviod comparison

From: Eric Blake
Subject: Re: [Qemu-devel] [PATCH] COLO-compare: Add compare_lock aviod comparison conflict
Date: Tue, 25 Apr 2017 08:28:53 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.0

On 04/19/2017 11:32 PM, Zhang Chen wrote:

In the subject: s/aviod/avoid/

> When network traffic heavy, compare_pri_rs_finalize() and
> compare_sec_rs_finalize() have a chance to confilct.


> Both of them call colo_compare_connection() to compare packet,
> But during compare_pri_rs_finalize() comparison, have secondary
> packet come and call compare_sec_rs_finalize(), that packet will be
> handle twice. If packet same, the pkt will be double free.
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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