From: Artem Bityutskiy <dedekind1@gmail.com>
To: Nick Piggin <npiggin@suse.de>
Cc: Kristo Tero Tapani <tero.kristo@nokia.com>,
Jens Axboe <axboe@kernel.dk>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCHv2 11/11] writeback: prevent unnecessary bdi threads wakeups
Date: Thu, 22 Jul 2010 12:50:25 +0300 [thread overview]
Message-ID: <1279792225.3044.37.camel@localhost> (raw)
In-Reply-To: <20100722080511.GA9377@amd>
On Thu, 2010-07-22 at 18:05 +1000, Nick Piggin wrote:
> This is producing 2 unrequired context switches, so I really would
> like to see it done properly. Setting up a timer is really pretty
> simple (or if you would care to implement a delayed process wakeup
> API, I think that would be useful -- I'm surprised there isn't one
> already).
OK, a generic 'wake_up_process_timeout()' would need a timer, and it
cannot set it up on stack because it has to return immediately, this is
why we do not have such a generic helper, I think.
--
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
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next prev parent reply other threads:[~2010-07-22 9:57 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-21 9:31 [PATCHv2 00/16] kill unnecessary bdi wakeups + cleanups Artem Bityutskiy
2010-07-21 9:31 ` [PATCHv2 01/11] writeback: harmonize writeback threads naming Artem Bityutskiy
2010-07-21 9:31 ` [PATCHv2 02/11] writeback: fix possible race when creating bdi threads Artem Bityutskiy
2010-07-21 11:57 ` Christoph Hellwig
2010-07-21 9:31 ` [PATCHv2 03/11] writeback: do not lose wake-ups in the forker thread - 1 Artem Bityutskiy
2010-07-21 9:31 ` [PATCHv2 04/11] writeback: do not lose wake-ups in the forker thread - 2 Artem Bityutskiy
2010-07-21 11:57 ` Christoph Hellwig
2010-07-21 9:31 ` [PATCHv2 05/11] writeback: do not lose wake-ups in bdi threads Artem Bityutskiy
2010-07-21 9:31 ` [PATCHv2 06/11] writeback: simplify bdi code a little Artem Bityutskiy
2010-07-21 12:01 ` Christoph Hellwig
2010-07-21 9:31 ` [PATCHv2 07/11] writeback: do not remove bdi from bdi_list Artem Bityutskiy
2010-07-21 12:02 ` Christoph Hellwig
2010-07-21 9:31 ` [PATCHv2 08/11] writeback: move last_active to bdi Artem Bityutskiy
2010-07-21 9:31 ` [PATCHv2 09/11] writeback: restructure bdi forker loop a little Artem Bityutskiy
2010-07-21 12:02 ` Christoph Hellwig
2010-07-21 9:31 ` [PATCHv2 10/11] writeback: move bdi threads exiting logic to the forker thread Artem Bityutskiy
2010-07-21 12:04 ` Christoph Hellwig
2010-07-21 9:31 ` [PATCHv2 11/11] writeback: prevent unnecessary bdi threads wakeups Artem Bityutskiy
2010-07-21 11:45 ` Artem Bityutskiy
2010-07-22 0:41 ` Dave Chinner
2010-07-22 6:50 ` Artem Bityutskiy
2010-07-22 9:00 ` Christoph Hellwig
2010-07-22 9:24 ` Artem Bityutskiy
2010-07-22 13:27 ` Artem Bityutskiy
2010-07-21 12:12 ` Christoph Hellwig
2010-07-22 3:19 ` Nick Piggin
2010-07-22 6:48 ` Artem Bityutskiy
2010-07-22 7:22 ` Tero.Kristo
2010-07-22 8:07 ` Nick Piggin
2010-07-22 8:05 ` Nick Piggin
2010-07-22 8:02 ` Artem Bityutskiy
2010-07-22 8:59 ` Nick Piggin
2010-07-22 9:50 ` Artem Bityutskiy [this message]
2010-07-23 15:03 ` Artem Bityutskiy
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