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| author | Christoph Lameter <clameter@engr.sgi.com> | 2006-03-14 19:50:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-14 21:43:02 -0800 |
| commit | 4983da07f1e2e8dc81cb9d640fbf35b899cdbdf2 (patch) | |
| tree | 9c238114f029d1d22bc55f47e8d95ef7335c540d /fs/buffer.c | |
| parent | e843e280cbe218fc8387339806d344708dee348a (diff) | |
| download | lwn-4983da07f1e2e8dc81cb9d640fbf35b899cdbdf2.tar.gz lwn-4983da07f1e2e8dc81cb9d640fbf35b899cdbdf2.zip | |
[PATCH] page migration: fail if page is in a vma flagged VM_LOCKED
page migration currently simply retries a couple of times if try_to_unmap()
fails without inspecting the return code.
However, SWAP_FAIL indicates that the page is in a vma that has the
VM_LOCKED flag set (if ignore_refs ==1). We can check for that return code
and avoid retrying the migration.
migrate_page_remove_references() now needs to return a reason why the
failure occured. So switch migrate_page_remove_references to use -Exx
style error messages.
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/buffer.c')
| -rw-r--r-- | fs/buffer.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index 62cfd17dc5fe..a9b399402007 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -3060,6 +3060,7 @@ int buffer_migrate_page(struct page *newpage, struct page *page) { struct address_space *mapping = page->mapping; struct buffer_head *bh, *head; + int rc; if (!mapping) return -EAGAIN; @@ -3069,8 +3070,9 @@ int buffer_migrate_page(struct page *newpage, struct page *page) head = page_buffers(page); - if (migrate_page_remove_references(newpage, page, 3)) - return -EAGAIN; + rc = migrate_page_remove_references(newpage, page, 3); + if (rc) + return rc; bh = head; do { |