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Date: Fri, 9 Aug 2013 10:53:57 +0200
From: Stefan Hajnoczi <stefanha@gmail.com>
Message-ID: <20130809085357.GC22210@stefanha-thinkpad.redhat.com>
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Subject: Re: [Qemu-devel] [RFC] [PATCHv8 05/30] aio / timers: Add
 prctl(PR_SET_TIMERSLACK, 1, ...) to reduce timer slack
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To: Alex Bligh <alex@alex.org.uk>
Cc: Kevin Wolf <kwolf@redhat.com>, Anthony Liguori <aliguori@us.ibm.com>, qemu-devel@nongnu.org, liu ping fan <qemulist@gmail.com>, Stefan Hajnoczi <stefanha@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>, rth@twiddle.net

On Thu, Aug 08, 2013 at 10:42:02PM +0100, Alex Bligh wrote:
> Where supported, called prctl(PR_SET_TIMERSLACK, 1, ...) to
> set one nanosecond timer slack to increase precision of timer
> calls.
> 
> Signed-off-by: Alex Bligh <alex@alex.org.uk>
> ---
>  qemu-timer.c |    7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/qemu-timer.c b/qemu-timer.c
> index 5e81935..9eb6db8 100644
> --- a/qemu-timer.c
> +++ b/qemu-timer.c
> @@ -41,6 +41,10 @@
>  #include <poll.h>
>  #endif
>  
> +#ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK

The ./configure change should also be in this patch.  I think it crept
into another patch by mistake.