From: Janet Morgan <janetmor@us.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: suparna@in.ibm.com, daniel@osdl.org, pbadari@us.ibm.com,
linux-aio@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH linux-2.6.0-test10-mm1] filemap_fdatawait.patch
Date: Sun, 11 Jan 2004 15:14:07 -0800 [thread overview]
Message-ID: <4001D8BF.902@us.ibm.com> (raw)
In-Reply-To: <20031231031736.0416808f.akpm@osdl.org>
Andrew Morton wrote:
>Andrew Morton <akpm@osdl.org> wrote:
>
>
>>Let me actually think about this a bit.
>>
>>
>
>Nasty. The same race is present in 2.4.x...
>
>How's about we start new I/O in filemap_fdatawait() if the page is dirty?
>
>
>diff -puN mm/filemap.c~a mm/filemap.c
>--- 25/mm/filemap.c~a 2003-12-31 03:10:29.000000000 -0800
>+++ 25-akpm/mm/filemap.c 2003-12-31 03:17:05.000000000 -0800
>@@ -206,7 +206,13 @@ restart:
> page_cache_get(page);
> spin_unlock(&mapping->page_lock);
>
>- wait_on_page_writeback(page);
>+ lock_page(page);
>+ if (PageDirty(page) && mapping->a_ops->writepage) {
>+ write_one_page(page, 1);
>+ } else {
>+ wait_on_page_writeback(page);
>+ unlock_page(page);
>+ }
> if (PageError(page))
> ret = -EIO;
>
>
>
>
That fixed the problem! Stephen's testcase is running successfully on
2.6.1-mm1 plus your patch -- no more uninitialized data!
Thanks!
-Janet
P.S. Sorry so late testing this (was on vacation).
next prev parent reply other threads:[~2004-01-11 23:15 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3FCD4B66.8090905@us.ibm.com>
2003-12-06 1:29 ` [PATCH linux-2.6.0-test10-mm1] dio-read-race-fix Daniel McNeil
2003-12-08 18:23 ` Daniel McNeil
2003-12-12 0:51 ` Daniel McNeil
2003-12-17 1:25 ` [PATCH linux-2.6.0-test10-mm1] filemap_fdatawait.patch Daniel McNeil
2003-12-17 2:03 ` Andrew Morton
2003-12-17 19:25 ` Daniel McNeil
2003-12-17 20:17 ` Janet Morgan
2003-12-31 9:18 ` Suparna Bhattacharya
2003-12-31 9:35 ` Andrew Morton
2003-12-31 9:55 ` Suparna Bhattacharya
2003-12-31 9:59 ` Andrew Morton
2003-12-31 10:09 ` Suparna Bhattacharya
2003-12-31 10:10 ` Andrew Morton
2003-12-31 10:48 ` Suparna Bhattacharya
2003-12-31 10:53 ` Andrew Morton
2003-12-31 10:54 ` Andrew Morton
2003-12-31 11:17 ` Andrew Morton
2003-12-31 22:34 ` [PATCH linux-2.6.1-rc1-mm1] filemap_fdatawait.patch Daniel McNeil
2003-12-31 22:41 ` [PATCH linux-2.6.1-rc1-mm1] aiodio_fallback_bio_count.patch Daniel McNeil
2003-12-31 23:46 ` Andrew Morton
2004-01-02 5:14 ` Suparna Bhattacharya
2004-01-02 7:46 ` Andrew Morton
2004-01-05 3:55 ` Suparna Bhattacharya
2004-01-05 5:06 ` Andrew Morton
2004-01-05 5:28 ` Suparna Bhattacharya
2004-01-05 5:28 ` Andrew Morton
2004-01-05 6:06 ` Suparna Bhattacharya
2004-01-05 6:14 ` Lincoln Dale
2003-12-31 22:47 ` [PATCH linux-2.6.1-rc1-mm1] dio_isize.patch Daniel McNeil
2003-12-31 23:42 ` [PATCH linux-2.6.1-rc1-mm1] filemap_fdatawait.patch Andrew Morton
2004-01-02 4:20 ` Suparna Bhattacharya
2004-01-02 4:36 ` Andrew Morton
2004-01-02 5:50 ` [PATCH linux-2.6.0-test10-mm1] filemap_fdatawait.patch Suparna Bhattacharya
2004-01-02 7:31 ` Andrew Morton
2004-01-05 13:49 ` Marcelo Tosatti
2004-01-05 20:27 ` Andrew Morton
2004-03-29 15:44 ` Marcelo Tosatti
2004-01-11 23:14 ` Janet Morgan [this message]
2004-01-11 23:44 ` Andrew Morton
2004-01-12 18:00 ` filemap_fdatawait.patch Daniel McNeil
2004-01-12 19:39 ` [PATCH linux-2.6.0-test10-mm1] filemap_fdatawait.patch Janet Morgan
2004-01-12 19:46 ` Daniel McNeil
2004-01-13 4:12 ` Janet Morgan
2003-12-30 4:53 ` [PATCH linux-2.6.0-test10-mm1] dio-read-race-fix Suparna Bhattacharya
2003-12-31 0:29 ` Daniel McNeil
2003-12-31 6:09 ` Suparna Bhattacharya
2004-01-08 23:55 ` Daniel McNeil
2004-01-09 3:55 ` Suparna Bhattacharya
2004-02-05 1:39 ` [PATCH 2.6.2-rc3-mm1] DIO read race fix Daniel McNeil
2004-02-05 1:54 ` Badari Pulavarty
2004-02-05 2:07 ` Andrew Morton
2004-02-05 2:54 ` Janet Morgan
2004-02-05 3:19 ` Andrew Morton
2004-02-05 3:43 ` Suparna Bhattacharya
2004-02-05 5:33 ` Andrew Morton
2004-02-05 17:52 ` Daniel McNeil
2004-02-05 18:53 ` Badari Pulavarty
2004-03-29 15:41 ` [PATCH linux-2.6.0-test10-mm1] dio-read-race-fix Suparna Bhattacharya
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