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authorShaohua Li <shaohua.li@intel.com>2008-02-04 22:29:33 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:19 -0800
commit62e1c55300f306e06478f460a7eefba085206e0b (patch)
treebe15b2e4801c837c5e20d43b8f29a53c0ba1391c /mm/truncate.c
parent7786fa9ac5366214fb942a9e62c6e46b4272c22c (diff)
downloadvexpress-lsk-62e1c55300f306e06478f460a7eefba085206e0b.tar.gz
page migraton: handle orphaned pages
Orphaned page might have fs-private metadata, the page is truncated. As the page hasn't mapping, page migration refuse to migrate the page. It appears the page is only freed in page reclaim and if zone watermark is low, the page is never freed, as a result migration always fail. I thought we could free the metadata so such page can be freed in migration and make migration more reliable. [akpm@linux-foundation.org: go direct to try_to_free_buffers()] Signed-off-by: Shaohua Li <shaohua.li@intel.com> Acked-by: Nick Piggin <npiggin@suse.de> Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/truncate.c')
-rw-r--r--mm/truncate.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/truncate.c b/mm/truncate.c
index 9838c050e2d..c35c49e54fb 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -84,7 +84,7 @@ EXPORT_SYMBOL(cancel_dirty_page);
/*
* If truncate cannot remove the fs-private metadata from the page, the page
- * becomes anonymous. It will be left on the LRU and may even be mapped into
+ * becomes orphaned. It will be left on the LRU and may even be mapped into
* user pagetables if we're racing with filemap_fault().
*
* We need to bale out if page->mapping is no longer equal to the original