From: clameter@sgi.com
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Christoph Hellwig <hch@lst.de>, Mel Gorman <mel@skynet.ie>
Cc: William Lee Irwin III <wli@holomorphy.com>, David Chinner <dgc@sgi.com>
Cc: Jens Axboe <jens.axboe@oracle.com>, Badari Pulavarty <pbadari@gmail.com>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Subject: [27/37] compound pages: Allow use of get_page_unless_zero with compound pages
Date: Wed, 20 Jun 2007 11:29:34 -0700 [thread overview]
Message-ID: <20070620183012.273119366@sgi.com> (raw)
In-Reply-To: 20070620182907.506775016@sgi.com
[-- Attachment #1: compound_get_one_unless --]
[-- Type: text/plain, Size: 925 bytes --]
This will be needed by targeted slab reclaim in order to ensure that a
compound page allocated by SLUB will not go away under us.
It also may be needed if Mel starts to implement defragmentation. The
moving of compound pages may require the establishment of a reference
before the use of page migration functions.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
include/linux/mm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: vps/include/linux/mm.h
===================================================================
--- vps.orig/include/linux/mm.h 2007-06-12 19:06:28.000000000 -0700
+++ vps/include/linux/mm.h 2007-06-12 19:06:41.000000000 -0700
@@ -292,7 +292,7 @@ static inline int put_page_testzero(stru
*/
static inline int get_page_unless_zero(struct page *page)
{
- VM_BUG_ON(PageCompound(page));
+ VM_BUG_ON(PageTail(page));
return atomic_inc_not_zero(&page->_count);
}
--
next prev parent reply other threads:[~2007-06-20 18:30 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-20 18:29 [00/37] Large Blocksize Support V4 clameter
2007-06-20 18:29 ` [01/37] Define functions for page cache handling clameter
2007-06-20 18:29 ` [02/37] Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user clameter
2007-06-20 18:29 ` [03/37] Use page_cache_xxx function in mm/filemap.c clameter
2007-06-20 18:29 ` [04/37] Use page_cache_xxx in mm/page-writeback.c clameter
2007-06-20 18:29 ` [05/37] Use page_cache_xxx in mm/truncate.c clameter
2007-06-20 18:29 ` [06/37] Use page_cache_xxx in mm/rmap.c clameter
2007-06-20 18:29 ` [07/37] Use page_cache_xxx in mm/filemap_xip.c clameter
2007-06-20 18:29 ` [08/37] Use page_cache_xxx in mm/migrate.c clameter
2007-06-20 18:29 ` [09/37] Use page_cache_xxx in fs/libfs.c clameter
2007-06-20 18:29 ` [10/37] Use page_cache_xxx in fs/sync clameter
2007-06-20 18:29 ` [11/37] Use page_cache_xxx in fs/buffer.c clameter
2007-06-20 18:29 ` [12/37] Use page_cache_xxx in mm/mpage.c clameter
2007-06-20 18:29 ` [13/37] Use page_cache_xxx in mm/fadvise.c clameter
2007-06-20 18:29 ` [14/37] Use page_cache_xxx in fs/splice.c clameter
2007-06-20 18:29 ` [15/37] Use page_cache_xxx functions in fs/ext2 clameter
2007-06-20 18:29 ` [16/37] Use page_cache_xxx in fs/ext3 clameter
2007-06-20 18:29 ` [17/37] Use page_cache_xxx in fs/ext4 clameter
2007-06-20 18:29 ` [18/37] Use page_cache_xxx in fs/reiserfs clameter
2007-06-20 18:29 ` [19/37] Use page_cache_xxx for fs/xfs clameter
2007-06-20 18:29 ` [20/37] Fix PAGE SIZE assumption in miscellaneous places clameter
2007-06-20 18:29 ` [21/37] Use page_cache_xxx in drivers/block/loop.c clameter
2007-06-20 18:29 ` [22/37] Use page_cache_xxx in drivers/block/rd.c clameter
2007-06-20 18:29 ` [23/37] compound pages: PageHead/PageTail instead of PageCompound clameter
2007-06-20 18:29 ` [24/37] compound pages: Add new support functions clameter
2007-06-20 18:29 ` [25/37] compound pages: vmstat support clameter
2007-06-20 18:29 ` [26/37] compound pages: Use new compound vmstat functions in SLUB clameter
2007-06-20 18:29 ` clameter [this message]
2007-06-20 18:29 ` [28/37] compound pages: Allow freeing of compound pages via pagevec clameter
2007-06-20 18:29 ` [29/37] Large blocksize support: Fix up reclaim counters clameter
2007-06-20 18:29 ` [30/37] Add VM_BUG_ONs to check for correct page order clameter
2007-06-20 18:29 ` [31/37] Large blocksize support: Core piece clameter
2007-06-21 0:20 ` Bob Picco
2007-06-21 5:26 ` Christoph Lameter
2007-06-20 18:29 ` [32/37] Readahead changes to support large blocksize clameter
2007-06-20 18:29 ` [33/37] Large blocksize: Compound page zeroing and flushing clameter
2007-06-20 18:29 ` [34/37] Large blocksize support in ramfs clameter
2007-06-20 20:50 ` Andreas Dilger
2007-06-20 21:29 ` Christoph Lameter
2007-06-20 18:29 ` [35/37] Large blocksize support in XFS clameter
2007-06-20 18:29 ` [36/37] Large blocksize support for ext2 clameter
2007-06-20 20:56 ` Andreas Dilger
2007-06-20 21:27 ` Christoph Lameter
2007-06-20 22:19 ` Andreas Dilger
2007-06-20 18:29 ` [37/37] Reiserfs: Fix up for mapping_set_gfp_mask clameter
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