From: Jens Axboe <axboe@suse.de>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [patch] use cheaper elv_queue_empty when unplug a device
Date: Fri, 8 Apr 2005 12:02:36 +0200 [thread overview]
Message-ID: <20050408100235.GI22988@suse.de> (raw)
In-Reply-To: <425654F5.70707@yahoo.com.au>
On Fri, Apr 08 2005, Nick Piggin wrote:
> Jens Axboe wrote:
> >On Wed, Mar 30 2005, Nick Piggin wrote:
>
> >>So Kenneth if you could look into this one as well, to see if
> >>it is worthwhile, that would be great.
> >
> >
> >For that to work, you have to change the get_io_context() allocation to
> >be GFP_ATOMIC.
> >
>
> Yes of course, thanks for picking that up.
>
> I guess this isn't a problem, as io contexts should be allocated
> comparatively rarely. It would be possible to move it out of the
> lock though if we really want to.
Lets just keep it inside the lock, for the fast case it should just be
an increment of the already existing io context.
--
Jens Axboe
next prev parent reply other threads:[~2005-04-08 10:02 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-29 2:53 [patch] use cheaper elv_queue_empty when unplug a device Chen, Kenneth W
2005-03-29 8:06 ` Jens Axboe
2005-03-29 9:19 ` Nick Piggin
2005-03-29 9:21 ` Nick Piggin
2005-03-29 9:28 ` Jens Axboe
2005-03-29 9:50 ` Nick Piggin
2005-03-29 10:06 ` Nick Piggin
2005-03-30 0:57 ` Nick Piggin
2005-03-30 8:11 ` Jens Axboe
2005-04-08 9:45 ` Jens Axboe
2005-04-08 9:55 ` Nick Piggin
2005-04-08 10:02 ` Jens Axboe [this message]
2005-04-08 10:22 ` Nick Piggin
2005-03-29 10:10 ` Arjan van de Ven
2005-03-29 10:19 ` Jens Axboe
2005-03-29 10:23 ` Nick Piggin
2005-03-29 13:15 ` Jens Axboe
2005-03-30 0:07 ` Nick Piggin
2005-03-29 19:02 ` Chen, Kenneth W
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