The patch titled
vmscan: limit VM_EXEC protection to file pages
has been removed from the -mm tree. Its filename was
vmscan-limit-vm_exec-protection-to-file-pages.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: vmscan: limit VM_EXEC protection to file pages
From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
It is possible to have !Anon but SwapBacked pages, and some apps could
create huge number of such pages with MAP_SHARED|MAP_ANONYMOUS. These
pages go into the ANON lru list, and hence shall not be protected: we only
care mapped executable files. Failing to do so may trigger OOM.
Tested-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
diff -puN mm/vmscan.c~vmscan-limit-vm_exec-protection-to-file-pages mm/vmscan.c
--- a/mm/vmscan.c~vmscan-limit-vm_exec-protection-to-file-pages
+++ a/mm/vmscan.c
@@ -1356,7 +1356,7 @@ static void shrink_active_list(unsigned
* IO, plus JVM can create lots of anon VM_EXEC pages,
* so we ignore them here.
*/
- if ((vm_flags & VM_EXEC) && !PageAnon(page)) {
+ if ((vm_flags & VM_EXEC) && page_is_file_cache(page)) {
list_add(&page->lru, &l_active);
continue;
}
_
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
origin.patch
linux-next.patch
readahead-add-blk_run_backing_dev.patch
page-types-constify-read-only-arrays.patch
page-types-trivial-typo-fixes.patch
page-types-unsigned-cannot-be-less-than-0-in-add_page.patch
mm-vsmcan-check-shrink_active_list-sc-isolate_pages-return-value.patch
dev-mem-remove-redundant-test-on-len.patch
dev-mem-introduce-size_inside_page.patch
dev-mem-cleanup-unxlate_dev_mem_ptr-calls.patch
dev-mem-cleanup-unxlate_dev_mem_ptr-calls-fix.patch
dev-mem-cleanup-unxlate_dev_mem_ptr-calls-fix-fix.patch
dev-mem-make-size_inside_page-logic-straight.patch
dev-mem-remove-the-written-variable-in-write_kmem.patch
dev-mem-remove-the-written-variable-in-write_kmem-fix.patch
dev-mem-remove-redundant-parameter-from-do_write_kmem.patch
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