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| author | Mel Gorman <mgorman@suse.de> | 2014-10-09 15:28:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 22:25:58 -0400 |
| commit | 97ee4ba7cbd30f1858f0d16911e042737c53f2ef (patch) | |
| tree | ac1ebf4b9622c2ae3cdd3010945c73b8147761e3 /mm/page_alloc.c | |
| parent | b246d3d11e9c04f76a4fd6aae9c61da82bba0afb (diff) | |
| download | lwn-97ee4ba7cbd30f1858f0d16911e042737c53f2ef.tar.gz lwn-97ee4ba7cbd30f1858f0d16911e042737c53f2ef.zip | |
mm: page_alloc: Make paranoid check in move_freepages a VM_BUG_ON
Since 2.6.24 there has been a paranoid check in move_freepages that looks
up the zone of two pages. This is a very slow path and the only time I've
seen this bug trigger recently is when memory initialisation was broken
during patch development. Despite the fact it's a slow path, this patch
converts the check to a VM_BUG_ON anyway as it has served its purpose by
now.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index f3769f0fce3c..eac31a6059c0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1015,7 +1015,7 @@ int move_freepages(struct zone *zone, * Remove at a later date when no bug reports exist related to * grouping pages by mobility */ - BUG_ON(page_zone(start_page) != page_zone(end_page)); + VM_BUG_ON(page_zone(start_page) != page_zone(end_page)); #endif for (page = start_page; page <= end_page;) { |