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authorChristoph Lameter <clameter@sgi.com>2006-02-01 06:05:41 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 11:53:17 -0500
commite965f9630c651fa4249039fd4b80c9392d07a856 (patch)
tree1353dd536d0ee549c30e462086624c21788ee9d2 /fs/ext2/inode.c
parent7e2ab150d1b3b286a4c864c60a549b2601777b63 (diff)
[PATCH] Direct Migration V9: Avoid writeback / page_migrate() method
Migrate a page with buffers without requiring writeback This introduces a new address space operation migratepage() that may be used by a filesystem to implement its own version of page migration. A version is provided that migrates buffers attached to pages. Some filesystems (ext2, ext3, xfs) are modified to utilize this feature. The swapper address space operation are modified so that a regular migrate_page() will occur for anonymous pages without writeback (migrate_pages forces every anonymous page to have a swap entry). Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ext2/inode.c')
-rw-r--r--fs/ext2/inode.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index e7d3f0522d01..a717837f272e 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -706,6 +706,7 @@ struct address_space_operations ext2_aops = {
706 .bmap = ext2_bmap, 706 .bmap = ext2_bmap,
707 .direct_IO = ext2_direct_IO, 707 .direct_IO = ext2_direct_IO,
708 .writepages = ext2_writepages, 708 .writepages = ext2_writepages,
709 .migratepage = buffer_migrate_page,
709}; 710};
710 711
711struct address_space_operations ext2_aops_xip = { 712struct address_space_operations ext2_aops_xip = {
@@ -723,6 +724,7 @@ struct address_space_operations ext2_nobh_aops = {
723 .bmap = ext2_bmap, 724 .bmap = ext2_bmap,
724 .direct_IO = ext2_direct_IO, 725 .direct_IO = ext2_direct_IO,
725 .writepages = ext2_writepages, 726 .writepages = ext2_writepages,
727 .migratepage = buffer_migrate_page,
726}; 728};
727 729
728/* 730/*