From: Anthony Liguori <aliguori@us.ibm.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm-devel@lists.sourceforge.net, Avi Kivity <avi@qumranet.com>
Subject: Re: [PATCH 1/4] Replace SIGUSR1 in io-thread with eventfd() (v2)
Date: Tue, 06 May 2008 14:44:38 -0500 [thread overview]
Message-ID: <4820B526.3020406@us.ibm.com> (raw)
In-Reply-To: <20080506194609.GA18171@dmt>
Marcelo Tosatti wrote:
> Looks good (the whole series).
>
> Needs some good testing of course... Have you tested migration/loadvm?
>
No, but I will before resubmitting (which should be sometime tomorrow).
Regards,
Anthony Liguori
> On Mon, May 05, 2008 at 08:47:12AM -0500, Anthony Liguori wrote:
>
>> It's a little odd to use signals to raise a notification on a file descriptor
>> when we can just work directly with a file descriptor instead. This patch
>> converts the SIGUSR1 based notification in the io-thread to instead use an
>> eventfd file descriptor. If eventfd isn't available, we use a pipe() instead.
>>
>> The benefit of using eventfd is that multiple notifications will be batched
>> into a signal IO event.
>>
>> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
>>
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prev parent reply other threads:[~2008-05-06 19:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-05 13:47 [PATCH 1/4] Replace SIGUSR1 in io-thread with eventfd() (v2) Anthony Liguori
2008-05-05 13:47 ` [PATCH 2/4] Use signalfd() in io-thread (v2) Anthony Liguori
2008-05-05 13:47 ` [PATCH 3/4] Interrupt io thread in qemu_set_fd_handler2 (v2) Anthony Liguori
2008-05-05 13:47 ` [PATCH 4/4] Only select once per-main_loop iteration (v2) Anthony Liguori
2008-05-06 19:46 ` [PATCH 1/4] Replace SIGUSR1 in io-thread with eventfd() (v2) Marcelo Tosatti
2008-05-06 19:44 ` Anthony Liguori [this message]
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