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authorRik van Riel <riel@redhat.com>2008-10-18 20:26:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 08:52:31 -0700
commitba470de43188cdbff795b5da43a1474523c6c2fb (patch)
tree0477460fa8c3e61edd9f1534cd2193656e586f8b /mm/truncate.c
parent8edb08caf68184fb170f4f69c7445929e199eaea (diff)
downloadvexpress-lsk-ba470de43188cdbff795b5da43a1474523c6c2fb.tar.gz
mmap: handle mlocked pages during map, remap, unmap
Originally by Nick Piggin <npiggin@suse.de> Remove mlocked pages from the LRU using "unevictable infrastructure" during mmap(), munmap(), mremap() and truncate(). Try to move back to normal LRU lists on munmap() when last mlocked mapping removed. Remove PageMlocked() status when page truncated from file. [akpm@linux-foundation.org: cleanup] [kamezawa.hiroyu@jp.fujitsu.com: fix double unlock_page()] [kosaki.motohiro@jp.fujitsu.com: split LRU: munlock rework] [lee.schermerhorn@hp.com: mlock: fix __mlock_vma_pages_range comment block] [akpm@linux-foundation.org: remove bogus kerneldoc token] Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: KAMEZAWA Hiroyuki <kamewzawa.hiroyu@jp.fujitsu.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.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/truncate.c b/mm/truncate.c
index e83e4b114ef..1229211104f 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -18,6 +18,7 @@
#include <linux/task_io_accounting_ops.h>
#include <linux/buffer_head.h> /* grr. try_to_release_page,
do_invalidatepage */
+#include "internal.h"
/**
@@ -103,6 +104,7 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
cancel_dirty_page(page, PAGE_CACHE_SIZE);
+ clear_page_mlock(page);
remove_from_page_cache(page);
ClearPageMappedToDisk(page);
page_cache_release(page); /* pagecache ref */
@@ -127,6 +129,7 @@ invalidate_complete_page(struct address_space *mapping, struct page *page)
if (PagePrivate(page) && !try_to_release_page(page, 0))
return 0;
+ clear_page_mlock(page);
ret = remove_mapping(mapping, page);
return ret;
@@ -352,6 +355,7 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
if (PageDirty(page))
goto failed;
+ clear_page_mlock(page);
BUG_ON(PagePrivate(page));
__remove_from_page_cache(page);
spin_unlock_irq(&mapping->tree_lock);