From: Rik van Riel <riel@redhat.com>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: 2.6.26-rc5-mm2
Date: Thu, 12 Jun 2008 15:29:05 -0400 [thread overview]
Message-ID: <20080612152905.6cb294ae@cuia.bos.redhat.com> (raw)
In-Reply-To: <200806120958.38545.nickpiggin@yahoo.com.au>
On Thu, 12 Jun 2008 09:58:38 +1000
Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> > Does loopback over tmpfs use a different allocation path?
>
> I'm sorry, hmm I didn't look closely enough and forgot that
> write_begin/write_end requires the callee to allocate the page
> as well, and that Hugh had nicely unified most of that.
>
> So maybe it's not that. It's pretty easy to hit I found with
> ext2 mounted over loopback on a tmpfs file.
Turns out the loopback driver uses splice, which moves
the pages from one place to another. This is why you
were seeing the problem with loopback, but not with
just a really big file on tmpfs.
I'm trying to make sense of all the splice code now
and will send fix as soon as I know how to fix this
problem in a nice way.
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next prev parent reply other threads:[~2008-06-12 19:29 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-10 5:31 2.6.26-rc5-mm2 Andrew Morton
2008-06-10 6:12 ` 2.6.26-rc5-mm2 Nick Piggin
2008-06-10 7:28 ` 2.6.26-rc5-mm2 Nick Piggin
2008-06-10 8:34 ` 2.6.26-rc5-mm2 Andrew Morton
2008-06-10 8:48 ` 2.6.26-rc5-mm2 Nick Piggin
2008-06-10 9:15 ` 2.6.26-rc5-mm2 Andrew Morton
2008-06-10 12:34 ` 2.6.26-rc5-mm2 Rik van Riel
2008-06-11 18:09 ` 2.6.26-rc5-mm2 Rik van Riel
2008-06-11 23:58 ` 2.6.26-rc5-mm2 Nick Piggin
2008-06-12 19:29 ` Rik van Riel [this message]
2008-06-12 21:15 ` 2.6.26-rc5-mm2 (swap_state.c:77) Hugh Dickins
2008-06-13 17:45 ` Rik van Riel
2008-06-13 21:15 ` Hugh Dickins
2008-06-13 22:03 ` Rik van Riel
2008-06-10 15:34 ` 2.6.26-rc5-mm2 Lee Schermerhorn
2008-06-10 16:50 ` 2.6.26-rc5-mm2 Hugh Dickins
2008-06-10 10:20 ` 2.6.26-rc5-mm2 lockup up on Intel G33+ICH9R+Core2Duo, -mm1 okay Grant Coady
2008-06-10 18:18 ` Andrew Morton
2008-06-10 21:48 ` Grant Coady
2008-06-10 11:50 ` 2.6.26-rc5-mm2 compile error in vmscan.c Helge Hafting
2008-06-10 12:23 ` Johannes Weiner
2008-06-10 18:37 ` Andrew Morton
2008-06-12 8:13 ` Helge Hafting
2008-06-11 2:26 ` 2.6.26-rc5-mm2 (compile error in mm/memory_hotplug.c) Yasunori Goto
2008-06-11 6:00 ` 2.6.26-rc5-mm2: OOM with 1G free swap Alexey Dobriyan
2008-06-11 6:11 ` Nick Piggin
2008-06-11 6:15 ` Nick Piggin
2008-06-11 6:27 ` Andrew Morton
2008-06-11 6:31 ` Nick Piggin
2008-06-11 6:36 ` KOSAKI Motohiro
2008-06-11 7:31 ` Frederik Deweerdt
2008-06-11 12:57 ` Rik van Riel
2008-06-11 13:44 ` Nick Piggin
2008-06-11 17:56 ` [BUG] 2.6.26-rc5-mm2 - kernel BUG at arch/x86/kernel/setup.c:388! Kamalesh Babulal
2008-06-11 18:28 ` Dave Hansen
2008-06-11 18:37 ` Vegard Nossum
2008-06-12 6:55 ` Kamalesh Babulal
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