From: Benjamin LaHaise <bcrl@redhat.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@zip.com.au>,
Andrea Arcangeli <andrea@suse.de>,
Rik van Riel <riel@conectiva.com.br>,
"David S. Miller" <davem@redhat.com>,
Marcelo Tosatti <marcelo@conectiva.com.br>,
Gerd Knorr <kraxel@bytesex.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] __free_pages_ok oops
Date: Sat, 9 Feb 2002 09:33:05 -0500 [thread overview]
Message-ID: <20020209093305.A13748@redhat.com> (raw)
In-Reply-To: <3C630D5D.CD66795@zip.com.au> <Pine.LNX.4.21.0202081649120.1497-100000@localhost.localdomain>
In-Reply-To: <Pine.LNX.4.21.0202081649120.1497-100000@localhost.localdomain>; from hugh@veritas.com on Fri, Feb 08, 2002 at 05:46:56PM +0000
On Fri, Feb 08, 2002 at 05:46:56PM +0000, Hugh Dickins wrote:
> Ben, you probably have an AIO opinion here. Is there a circumstance
> in which AIO can unpin a user page at interrupt time, after the
> calling task has (exited or) unmapped the page?
If the user unmaps the page, then aio is left holding the last reference
to the page and will unmap it from irq or bh context (potentially task
context too). With networked aio, pages from userspace (anonymous or
page cache pages) will be released by the network stack from bh context.
Even now, I'm guess that should be possible with the zero copy flag...
-ben
next prev parent reply other threads:[~2002-02-09 14:33 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-06 19:06 [PATCH] __free_pages_ok oops Hugh Dickins
2002-02-06 19:47 ` Andrew Morton
2002-02-06 20:15 ` Hugh Dickins
2002-02-06 21:11 ` Andrew Morton
2002-02-07 20:31 ` Manfred Spraul
2002-02-07 5:09 ` Benjamin LaHaise
2002-02-07 5:47 ` Andrew Morton
2002-02-07 5:55 ` David S. Miller
2002-02-07 6:19 ` Andrew Morton
2002-02-07 6:49 ` David S. Miller
2002-02-07 7:07 ` Andrew Morton
2002-02-07 11:52 ` Hugh Dickins
2002-02-07 12:34 ` Rik van Riel
2002-02-07 12:37 ` David S. Miller
2002-02-07 12:44 ` Rik van Riel
2002-02-07 13:19 ` Hugh Dickins
2002-02-07 13:27 ` Rik van Riel
2002-02-07 13:55 ` Daniel Phillips
2002-02-07 14:28 ` Hugh Dickins
2002-02-07 14:56 ` Rik van Riel
2002-02-07 20:21 ` Hugh Dickins
2002-02-07 20:58 ` Andrea Arcangeli
2002-02-07 21:09 ` Andrew Morton
2002-02-07 22:18 ` Andrea Arcangeli
2002-02-07 22:31 ` Andrew Morton
2002-02-07 23:09 ` Andrea Arcangeli
2002-02-07 23:27 ` Andrew Morton
2002-02-08 17:46 ` Hugh Dickins
2002-02-09 14:14 ` Gerd Knorr
2002-02-09 15:47 ` arjan
2002-02-09 14:33 ` Benjamin LaHaise [this message]
2002-02-12 20:19 ` Hugh Dickins
2002-02-13 18:52 ` Marcelo Tosatti
2002-02-14 10:47 ` Hugh Dickins
2002-02-14 11:10 ` Gerd Knorr
2002-02-14 13:10 ` Andrea Arcangeli
2002-02-14 14:01 ` Hugh Dickins
2002-02-14 15:17 ` Andrea Arcangeli
2002-02-14 16:27 ` Linus Torvalds
2002-02-25 18:32 ` Benjamin LaHaise
2002-02-25 19:35 ` Linus Torvalds
2002-02-07 9:48 ` Benjamin LaHaise
-- strict thread matches above, loose matches on Subject: below --
2002-02-09 8:52 alad
2002-02-09 10:46 ` Hugh Dickins
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