[patch] Revert "page-writeback.c: subtract min_free_kbytes from dirtyable memory"
From: Johannes Weiner
Date: Thu Jul 25 2013 - 18:59:12 EST
This reverts commit 75f7ad8e043d9383337d917584297f7737154bbf. It was
the result of a problem observed with a 3.2 kernel and merged in 3.9,
while the issue had been resolved upstream in 3.3 (ab8fabd mm: exclude
reserved pages from dirtyable memory).
The "reserved pages" are a superset of min_free_kbytes, thus this
change is redundant and confusing. Revert it.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
mm/page-writeback.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 3f0c895..d374b29 100644
@@ -241,9 +241,6 @@ static unsigned long global_dirtyable_memory(void)
x -= highmem_dirtyable_memory(x);
- /* Subtract min_free_kbytes */
- x -= min_t(unsigned long, x, min_free_kbytes >> (PAGE_SHIFT - 10));
return x + 1; /* Ensure that we never return 0 */
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