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From: Greg Stark <gsstark@mit.edu>
To: Jens Axboe <axboe@suse.de>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ide write barrier support
Date: 14 Oct 2003 23:40:42 -0400	[thread overview]
Message-ID: <871xtfjhhh.fsf@stark.dyndns.tv> (raw)
In-Reply-To: <20031013140858.GU1107@suse.de>


Jens Axboe <axboe@suse.de> writes:

> Hi,
> 
> Forward ported and tested today (with the dummy ext3 patch included),
> works for me. Some todo's left, but I thought I'd send it out to gauge
> interest. TODO:


Is there a user-space interface planned for this? 


One possibility may be just to hang it off fsync(2) so fsync doesn't return
until until all the buffers it flushed are actually synced to disk. That's its
documented semantics anyways.


There's also the case of files opened with O_SYNC. Would inserting a write
barrier after every write to such a file destroy performance?


-- 
greg


  parent reply	other threads:[~2003-10-15  3:41 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-10-13 14:08 Jens Axboe
2003-10-13 15:23 ` Jeff Garzik
2003-10-13 15:35   ` Jens Axboe
2003-10-13 15:37     ` Jens Axboe
2003-10-13 22:39 ` Matthias Andree
2003-10-14  0:16   ` Jeff Garzik
2003-10-16 10:36     ` Jens Axboe
2003-10-16 10:46       ` Jeff Garzik
2003-10-16 10:48         ` Jens Axboe
2003-10-13 23:07 ` Andrew Morton
2003-10-14  6:48   ` Jens Axboe
2003-10-15  3:40 ` Greg Stark [this message]
2003-10-16  7:10   ` Jens Axboe
2003-10-20 17:10 ` Daniel Phillips
2003-10-20 19:56   ` Jens Axboe
2003-10-20 23:46     ` Daniel Phillips
2003-10-21  5:40       ` Jens Axboe
2003-10-23 16:22         ` Daniel Phillips
2003-10-23 16:23           ` Jens Axboe
2003-10-23 17:20             ` Daniel Phillips
2003-10-23 23:21               ` Nick Piggin
2003-10-26 21:06                 ` Daniel Phillips
2003-10-27 10:29                   ` Lars Marowsky-Bree
2003-10-27 21:35                     ` Daniel Phillips
2003-10-24  9:36               ` Helge Hafting
2003-10-26 15:38                 ` Daniel Phillips
2003-10-16 16:51 Mudama, Eric
2003-10-16 20:43 ` Greg Stark
2003-10-17  6:44   ` Jens Axboe
2003-10-17  6:46 ` Jens Axboe
2003-10-16 20:51 Mudama, Eric
2003-10-17  6:48 ` Jens Axboe
2003-10-17 16:07 Mudama, Eric
2003-10-17 18:08 ` Jens Axboe
2003-10-17 17:59 Manfred Spraul
2003-10-17 18:06 ` Jens Axboe
2003-10-21  0:47   ` Matthias Andree
2003-10-17 18:42 Mudama, Eric
     [not found] <IXzh.61g.5@gated-at.bofh.it>
2003-10-21 19:24 ` Anton Ertl

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