Commit 72457c0a authored by Johannes Weiner's avatar Johannes Weiner Committed by Linus Torvalds
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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: default avatarJohannes Weiner <>
Cc: Paul Szabo <>
Cc: Rik van Riel <>
Acked-by: default avatarMinchan Kim <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 81c0a2bb
......@@ -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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