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Message-ID: <4A40ECFF.7060706@gmail.com>
Date: Tue, 23 Jun 2009 10:55:59 -0400
From: Gregory Haskins <gregory.haskins@gmail.com>
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To: "Michael S. Tsirkin" <mst@redhat.com>
CC: Gregory Haskins <ghaskins@novell.com>, kvm@vger.kernel.org,
       linux-kernel@vger.kernel.org, avi@redhat.com,
       paulmck@linux.vnet.ibm.com, davidel@xmailserver.org, mingo@elte.hu,
       rusty@rustcorp.com.au
Subject: Re: [KVM PATCH v3 3/3] KVM: Fix races in irqfd using new eventfd_kref_get
 interface
References: <20090622155504.22967.50532.stgit@dev.haskins.net> <20090622160556.22967.76273.stgit@dev.haskins.net> <20090622165708.GB15228@redhat.com> <4A3FBFF1.8050504@gmail.com>
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Gregory Haskins wrote:
> Michael S. Tsirkin wrote:
>  =20
>
>>  And note that multiple works can run on irqfd
>> in parallel.
>>  =20
>>    =20
>
> They can?  I thought work-queue items were guaranteed to only schedule
> once?  If what you say is true, its broken, I agree, and Ill need to
> revisit.  Let me get back to you.
>  =20

<sigh> Yep, you are right.  This is broken in my code. :(

Will address in the next spin.  Good catch.

-Greg




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