The patch titled
Subject: page-writeback.c: subtract min_free_kbytes from dirtyable memory
has been added to the -mm tree. Its filename is
page-writebackc-subtract-min_free_kbytes-from-dirtyable-memory.patch
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------------------------------------------------------
From: Paul Szabo <psz@xxxxxxxxxxxxxxxxx>
Subject: page-writeback.c: subtract min_free_kbytes from dirtyable memory
When calculating amount of dirtyable memory, min_free_kbytes should be
subtracted because it is not intended for dirty pages.
Addresses http://bugs.debian.org/695182
Signed-off-by: Paul Szabo <psz@xxxxxxxxxxxxxxxxx>
Acked-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page-writeback.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN mm/page-writeback.c~page-writebackc-subtract-min_free_kbytes-from-dirtyable-memory mm/page-writeback.c
--- a/mm/page-writeback.c~page-writebackc-subtract-min_free_kbytes-from-dirtyable-memory
+++ a/mm/page-writeback.c
@@ -233,6 +233,7 @@ static unsigned long highmem_dirtyable_m
static unsigned long global_dirtyable_memory(void)
{
unsigned long x;
+ extern int min_free_kbytes;
x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages();
x -= min(x, dirty_balance_reserve);
@@ -240,6 +241,9 @@ static unsigned long global_dirtyable_me
if (!vm_highmem_is_dirtyable)
x -= highmem_dirtyable_memory(x);
+ /* Subtract min_free_kbytes */
+ x -= min(x, min_free_kbytes >> (PAGE_SHIFT - 10));
+
return x + 1; /* Ensure that we never return 0 */
}
_
Patches currently in -mm which might be from psz@xxxxxxxxxxxxxxxxx are
page-writebackc-subtract-min_free_kbytes-from-dirtyable-memory.patch
page-writebackc-subtract-min_free_kbytes-from-dirtyable-memory-fix.patch
page-writebackc-subtract-min_free_kbytes-from-dirtyable-memory-fix-fix.patch
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