From: Theodore Tso <tytso@mit.edu>
To: Jan Kara <jack@suse.cz>
Cc: LKML <linux-kernel@vger.kernel.org>,
npiggin@suse.de, linux-ext4@vger.kernel.org
Subject: Re: [PATCH 05/11] ext4: Make sure blocks are properly allocated under mmaped page even when blocksize < pagesize
Date: Thu, 4 Jun 2009 10:09:49 -0400 [thread overview]
Message-ID: <20090604140949.GA2542@mit.edu> (raw)
In-Reply-To: <1243429268-3028-6-git-send-email-jack@suse.cz>
On Wed, May 27, 2009 at 03:01:02PM +0200, Jan Kara wrote:
> In a situation like:
> truncate(f, 1024);
> a = mmap(f, 0, 4096);
> a[0] = 'a';
> truncate(f, 4096);
>
> we end up with a dirty page which does not have all blocks allocated /
> reserved. Fix the problem by using new VFS infrastructure.
>
> Signed-off-by: Jan Kara <jack@suse.cz>
One warning --- this patch will have a slight patch conflict with the
patch ext4-convert-markers-to-tracepoints in the ext4 patch queue.
The ext4-convert-markers-to-tracepoints patch is also in the unstable
part of the patch queue, since it is waiting for patches allowing
tracepoints to be used in modules to be merged into mainline at the
next merge window. It's a very minor, easy fix-up, but depending who
which patch series gets merged first, there might be a minor fixup
required.
- Ted
next prev parent reply other threads:[~2009-06-04 14:09 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-27 13:00 [PATCH 0/11] Fix page_mkwrite() for blocksize < pagesize Jan Kara
2009-05-27 13:00 ` [PATCH 01/11] ext3: Get rid of extenddisksize parameter of ext3_get_blocks_handle() Jan Kara
2009-05-27 13:00 ` [PATCH 02/11] ext4: Get rid of extend_disksize parameter of ext4_get_blocks_handle() Jan Kara
2009-05-27 13:01 ` [PATCH 03/11] vfs: Add better VFS support for page_mkwrite when blocksize < pagesize Jan Kara
2009-05-27 16:00 ` Josef Bacik
2009-05-27 16:45 ` Aneesh Kumar K.V
2009-05-27 17:06 ` Josef Bacik
2009-05-28 13:03 ` Josef Bacik
2009-05-28 13:10 ` Aneesh Kumar K.V
2009-05-30 11:23 ` Pavel Machek
2009-06-01 9:44 ` Jan Kara
2009-06-01 11:33 ` Goswin von Brederlow
2009-06-01 14:00 ` Jan Kara
2009-06-01 14:46 ` Goswin von Brederlow
2009-06-01 15:02 ` Jan Kara
2009-06-01 15:35 ` Goswin von Brederlow
2009-05-27 13:01 ` [PATCH 04/11] ext2: Allocate space for mmaped file on page fault Jan Kara
2009-05-27 13:01 ` [PATCH 05/11] ext4: Make sure blocks are properly allocated under mmaped page even when blocksize < pagesize Jan Kara
2009-05-27 14:30 ` Theodore Tso
2009-05-27 14:52 ` Jan Kara
2009-06-04 14:09 ` Theodore Tso [this message]
2009-05-27 13:01 ` [PATCH 06/11] ext3: Allocate space for mmaped file on page fault Jan Kara
2009-05-27 13:01 ` [PATCH 07/11] vfs: Implement generic per-cpu counters for delayed allocation Jan Kara
2009-05-27 13:01 ` [PATCH 08/11] vfs: Unmap underlying metadata of new data buffers only when buffer is mapped Jan Kara
2009-05-27 15:35 ` Aneesh Kumar K.V
2009-05-28 9:44 ` Jan Kara
2009-05-28 10:15 ` Aneesh Kumar K.V
2009-05-28 13:50 ` Jan Kara
2009-05-27 13:01 ` [PATCH 09/11] fs: Don't clear dirty bits in block_write_full_page() Jan Kara
2009-05-27 13:01 ` [PATCH 10/11] vfs: Export wakeup_pdflush Jan Kara
2009-05-27 13:01 ` [PATCH 11/11] ext3: Implement delayed allocation on page_mkwrite time Jan Kara
2009-05-27 14:23 ` [PATCH 0/11] Fix page_mkwrite() for blocksize < pagesize Theodore Tso
2009-05-27 14:59 ` Jan Kara
2009-06-04 17:11 ` Theodore Tso
2009-06-05 23:23 ` Jan Kara
2009-05-27 15:33 ` Aneesh Kumar K.V
2009-05-28 9:36 ` Jan Kara
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