Commit 72457c0a authored Sep 11, 2013 by Johannes Weiner Committed by Linus Torvalds Sep 11, 2013

mm: revert "page-writeback.c: subtract min_free_kbytes from dirtyable memory"



This reverts commit 75f7ad8e.  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 (commit ab8fabd4: "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@cmpxchg.org>
Cc: Paul Szabo <psz@maths.usyd.edu.au>
Cc: Rik van Riel <riel@redhat.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 81c0a2bb

mm/page-writeback.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -241,9 +241,6 @@ static unsigned long global_dirtyable_memory(void)
		if (!vm_highmem_is_dirtyable)
		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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