From: Paolo Bonzini <pbonzini@redhat.com>
To: Fam Zheng <famz@redhat.com>, qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>,
borntraeger@de.ibm.com, Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [PATCH] thread-pool: Notify AIO context upon completion
Date: Thu, 2 Jul 2015 09:11:58 +0200 [thread overview]
Message-ID: <5594E43E.1040400@redhat.com> (raw)
In-Reply-To: <1435818839-5376-1-git-send-email-famz@redhat.com>
On 02/07/2015 08:33, Fam Zheng wrote:
> bdrv_flush() uses a loop like
>
> while (rwco.ret == NOT_DONE) {
> aio_poll(aio_context, true);
> }
>
> to wait for thread pool, which may not get notified about the scheduled
> BH right away, if there is no new event that wakes up a blocking
> qemu_poll_ns().
That translates to "the dispatching optimization does not work". :) I
do not think that is the problem.
Paolo
next prev parent reply other threads:[~2015-07-02 7:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-02 6:33 [Qemu-devel] [PATCH] thread-pool: Notify AIO context upon completion Fam Zheng
2015-07-02 6:45 ` Christian Borntraeger
2015-07-02 7:11 ` Paolo Bonzini [this message]
2015-07-02 7:17 ` Fam Zheng
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