From: Wayne Scott <wscott@bitmover.com>
To: akpm@osdl.org
Cc: torvalds@osdl.org, elenstev@mesatop.com, lm@bitmover.com,
wli@holomorphy.com, hugh@veritas.com, adi@bitmover.com,
scole@lanl.gov, support@bitmover.com,
linux-kernel@vger.kernel.org
Subject: Re: 1352 NUL bytes at the end of a page?
Date: Mon, 17 May 2004 08:56:40 -0500 (EST) [thread overview]
Message-ID: <20040517.085640.30175416.wscott@bitmover.com> (raw)
In-Reply-To: <20040516231120.405a0d14.akpm@osdl.org>
From: Andrew Morton <akpm@osdl.org>
> Well we can stop right there, because the only way someone can get some
> more non-zero user data into this page before we memset and write it is by
> locking the page beforehand, and block_write_full_page() has the page lock.
> (Or they can write stuff into it via mmap, but writing to the page outside
> i_size is an application bug).
BTW: BitKeeper never opens a writable mmap to a file. The files are
read with mmap() and written by fwriting to a tmp file and then
renaming over the target. And since we run on Windows, no process has
the file open when we are updating it.
Still catching up on this thread.
-Wayne
next prev parent reply other threads:[~2004-05-17 13:56 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200405122234.06902.elenstev@mesatop.com>
[not found] ` <15594C37-A509-11D8-A7EA-000A95CC3A8A@lanl.gov>
[not found] ` <20040513183316.GE17965@bitmover.com>
[not found] ` <200405131723.15752.elenstev@mesatop.com>
[not found] ` <6616858C-A5AF-11D8-A7EA-000A95CC3A8A@lanl.gov>
[not found] ` <20040514144617.GE20197@work.bitmover.com>
2004-05-14 4:32 ` Steven Cole
2004-05-14 16:53 ` 1352 NUL bytes at the end of a page? (was Re: Assertion `s && s->tree' failed: The saga continues.) Andy Isaacson
2004-05-14 17:23 ` Steven Cole
2004-05-15 0:54 ` Steven Cole
2004-05-15 1:55 ` 1352 NUL bytes at the end of a page? Wayne Scott
2004-05-15 3:15 ` 1352 NUL bytes at the end of a page? (was Re: Assertion `s && s->tree' failed: The saga continues.) Lincoln Dale
2004-05-15 3:41 ` Andrew Morton
2004-05-15 5:39 ` Steven Cole
2004-05-16 1:23 ` Steven Cole
2004-05-16 2:18 ` Linus Torvalds
2004-05-16 3:44 ` Linus Torvalds
2004-05-16 4:31 ` Steven Cole
2004-05-16 4:52 ` Linus Torvalds
2004-05-16 5:22 ` Andrea Arcangeli
2004-05-16 15:28 ` Steven Cole
2004-05-16 17:49 ` Rutger Nijlunsing
2004-05-16 20:38 ` Andrea Arcangeli
2004-05-16 21:19 ` Steven Cole
2004-05-16 21:29 ` Andrew Morton
2004-05-16 22:11 ` Steven Cole
2004-05-16 23:53 ` Andrea Arcangeli
2004-05-17 2:12 ` Steven Cole
2004-05-17 8:21 ` R. J. Wysocki
2004-05-16 5:54 ` Steven Cole
2004-05-16 6:09 ` Andrew Morton
2004-05-16 6:24 ` Andrew Morton
2004-05-16 10:01 ` Andrew Morton
2004-05-16 13:49 ` Steven Cole
2004-05-18 1:47 ` Benjamin Herrenschmidt
2004-05-16 3:20 ` Andrew Morton
2004-05-16 3:58 ` Linus Torvalds
2004-05-17 2:28 ` Larry McVoy
2004-05-17 2:42 ` Linus Torvalds
2004-05-17 3:36 ` Steven Cole
2004-05-17 5:17 ` Linus Torvalds
2004-05-17 6:11 ` Andrew Morton
2004-05-17 13:56 ` Wayne Scott [this message]
2004-05-17 15:17 ` 1352 NUL bytes at the end of a page? Theodore Ts'o
2004-05-17 15:20 ` Larry McVoy
2004-05-17 15:22 ` Linus Torvalds
2004-05-17 15:25 ` Larry McVoy
2004-05-17 15:37 ` viro
2004-05-17 17:30 ` Steven Cole
2004-05-17 17:40 ` viro
2004-05-17 17:39 ` Steven Cole
2004-05-17 19:06 ` viro
2004-05-17 15:40 ` Arjan van de Ven
2004-05-17 15:53 ` Steven Cole
2004-05-17 16:23 ` Davide Libenzi
2004-05-17 16:28 ` Davide Libenzi
2004-05-17 14:07 ` 1352 NUL bytes at the end of a page? (was Re: Assertion `s && s->tree' failed: The saga continues.) Larry McVoy
2004-05-17 14:12 ` Linus Torvalds
2004-05-17 7:25 ` Andrew Morton
2004-05-17 7:46 ` Andrew Morton
2004-05-17 8:39 ` Vladimir Saveliev
2004-05-17 8:44 ` Andrew Morton
2004-05-17 11:58 ` Steven Cole
2004-05-17 14:05 ` Larry McVoy
2004-05-17 14:14 ` Larry McVoy
2004-05-17 14:32 ` Linus Torvalds
2004-05-17 14:52 ` Larry McVoy
2004-05-17 15:02 ` Linus Torvalds
2004-05-17 15:05 ` Larry McVoy
2004-05-17 15:23 ` Chris Mason
2004-05-17 15:49 ` Steven Cole
2004-05-17 20:24 ` Chris Mason
2004-05-17 21:08 ` Steven Cole
2004-05-17 21:29 ` Andrew Morton
2004-05-17 22:15 ` Steven Cole
2004-05-17 23:52 ` Steven Cole
2004-05-18 0:03 ` Chris Mason
2004-05-18 0:15 ` Andrew Morton
2004-05-18 0:13 ` Andrew Morton
2004-05-18 0:45 ` Steven Cole
2004-05-18 1:34 ` Larry McVoy
2004-05-18 1:42 ` Andrew Morton
2004-05-18 1:56 ` Steven Cole
2004-05-17 14:11 ` Larry McVoy
[not found] ` <200405172142.52780.elenstev@mesatop.com>
[not found] ` <Pine.LNX.4.58.0405172056480.25502@ppc970.osdl.org>
[not found] ` <200405172319.38853.elenstev@mesatop.com>
2004-05-18 12:42 ` Chris Mason
2004-05-18 14:29 ` Steven Cole
2004-05-18 14:38 ` Linus Torvalds
2004-05-19 10:53 ` Steven Cole
2004-05-19 12:10 ` Chris Mason
2004-05-19 12:20 ` 1352 NUL bytes at the end of a page? Wayne Scott
2004-05-19 12:42 ` Nick Piggin
2004-05-19 13:28 ` Steven Cole
2004-05-19 13:36 ` Chris Mason
2004-05-19 13:59 ` Steven Cole
2004-05-19 14:03 ` Wayne Scott
2004-05-19 14:08 ` Chris Mason
2004-05-19 14:20 ` Steven Cole
2004-05-19 14:45 ` Steven Cole
2004-05-19 21:11 ` Non-regression for current kernel (was Re: 1352 NUL bytes at the end of a page?) Steven Cole
2004-05-13 19:08 1352 NUL bytes at the end of a page? Andy Isaacson
2004-05-14 2:22 ` Andrew Morton
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