From: Jens Axboe <jens.axboe@oracle.com>
To: Randy Dunlap <randy.dunlap@oracle.com>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] block core: use round_jiffies on timer to reduce wakeups
Date: Wed, 11 Nov 2009 13:46:17 +0100 [thread overview]
Message-ID: <20091111124617.GN8742@kernel.dk> (raw)
In-Reply-To: <4AFA03BB.90405@oracle.com>
On Tue, Nov 10 2009, Randy Dunlap wrote:
> From: Randy Dunlap <randy.dunlap@oracle.com>
>
> Use round_jiffies() variant to schedule the timer along with
> other timer wakeups on the same CPU.
>
> Source file also needs to include jiffies.h since it uses
> functions or macros from it.
round_jiffies() rounds to the next second, that's way too far away for
an event that should trigger within msecs.
--
Jens Axboe
prev parent reply other threads:[~2009-11-11 12:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-11 0:22 [PATCH] block core: use round_jiffies on timer to reduce wakeups Randy Dunlap
2009-11-11 12:46 ` Jens Axboe [this message]
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