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[PATCH] Direct Migration V9: Avoid writeback / page_migrate() method

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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>
This commit is contained in:
Christoph Lameter 2006-02-01 03:05:41 -08:00 • committed by Linus Torvalds
parent 7e2ab150d1
commit e965f9630c
10 changed files with 100 additions and 1 deletions
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1
mm/rmap.c
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@ -233,6 +233,7 @@ void remove_from_swap(struct page *page)
delete_from_swap_cache(page);
}
EXPORT_SYMBOL(remove_from_swap);
#endif
/*