From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Josef Sipek <jsipek@fsl.cs.sunysb.edu>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
Linux Memory Management <linux-mm@kvack.org>,
Chris Mason <mason@suse.com>, Andrea Arcangeli <andrea@suse.de>,
Hugh Dickins <hugh@veritas.com>, Andrew Morton <akpm@osdl.org>,
Jens Axboe <axboe@suse.de>, Linus Torvalds <torvalds@osdl.org>,
mike@halcrow.us, ezk@cs.sunysb.edu
Subject: Re: [rfc][patch] remove racy sync_page?
Date: Tue, 30 May 2006 16:50:23 +1000 [thread overview]
Message-ID: <447BEB2F.7020605@yahoo.com.au> (raw)
In-Reply-To: <447BE9E9.4000907@yahoo.com.au>
Nick Piggin wrote:
> Josef Sipek wrote:
>
>> On Mon, May 29, 2006 at 07:34:09PM +1000, Nick Piggin wrote:
>> ...
>>
>>> Can we get rid of the whole thing, confusing memory barriers and all?
>>> Nobody uses anything but the default sync_page
>>
>>
>>
>> I feel like I must say this: there are some file systems that live
>> outside the kernel (at least for now) that do _NOT_ use the default
>> sync_page. All the stackable file systems that are based on FiST [1],
>> such as Unionfs [2] and eCryptfs (currently in -mm) [3] (respective
>> authors CC'd). As an example, Unionfs must decide which lower file
>> system page to sync (since it may have several to chose from).
>
>
> OK, noted. Thanks. Luckily for them it looks like sync_page might
> stay for other reasons (eg. raid) ;)
Ah, no: that's the backing dev's unplug_fn. sync_page is always the
same. And it has definite bugs now that splice has been merged.
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next prev parent reply other threads:[~2006-05-30 6:50 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-29 9:34 Nick Piggin
2006-05-29 19:15 ` Andrew Morton
2006-05-30 0:08 ` Nick Piggin
2006-05-30 1:32 ` Andrew Morton
2006-05-30 2:54 ` Nick Piggin
2006-05-30 3:14 ` Andrew Morton
2006-05-30 4:13 ` Nick Piggin
2006-05-30 9:05 ` Jens Axboe
2006-05-31 13:43 ` Nick Piggin
2006-05-31 15:09 ` Hugh Dickins
2006-05-31 15:22 ` Nick Piggin
2006-05-31 17:51 ` Jens Axboe
2006-05-31 17:50 ` Jens Axboe
2006-05-30 4:20 ` Linus Torvalds
2006-05-30 5:07 ` Nick Piggin
2006-05-30 5:21 ` Nick Piggin
2006-05-30 6:12 ` Neil Brown
2006-05-30 7:10 ` Nick Piggin
2006-05-31 4:34 ` Neil Brown
2006-05-30 8:24 ` Nikita Danilov
2006-05-30 17:55 ` Linus Torvalds
2006-05-31 0:32 ` Nick Piggin
2006-05-31 0:56 ` Linus Torvalds
2006-05-31 1:33 ` Mark Lord
2006-05-31 6:11 ` Jens Axboe
2006-05-31 12:55 ` Mark Lord
2006-05-31 13:02 ` Jens Axboe
2006-06-01 13:19 ` NCQ performance (was Re: [rfc][patch] remove racy sync_page?) Jens Axboe
2006-06-01 14:56 ` Avi Kivity
2006-06-01 15:03 ` Jens Axboe
2006-06-01 18:04 ` Jens Axboe
2006-06-05 5:30 ` Avi Kivity
2006-06-05 7:59 ` Jens Axboe
2006-05-31 12:31 ` [rfc][patch] remove racy sync_page? Helge Hafting
2006-05-31 12:36 ` Arjan van de Ven
2006-05-31 13:29 ` Nick Piggin
2006-05-31 13:41 ` Jens Axboe
2006-05-31 13:54 ` Nick Piggin
2006-05-31 14:43 ` Linus Torvalds
2006-05-31 14:57 ` Nick Piggin
2006-05-31 15:13 ` Linus Torvalds
2006-05-31 15:09 ` Linus Torvalds
2006-05-31 18:13 ` Jens Axboe
2006-05-31 18:26 ` Linus Torvalds
2006-05-30 5:36 ` Nick Piggin
2006-05-30 18:31 ` Hugh Dickins
2006-05-31 0:21 ` Nick Piggin
2006-05-31 3:06 ` Hugh Dickins
2006-05-31 14:30 ` Hugh Dickins
2006-05-31 17:56 ` Jens Axboe
2006-05-30 5:51 ` Josef Sipek
2006-05-30 6:44 ` Nick Piggin
2006-05-30 6:50 ` Nick Piggin [this message]
2006-05-30 13:12 ` Josef Sipek
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