Re: [PATCH] mm: compaction: count compaction events only if compaction is enabled

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On Thu, Dec 20, 2012 at 11:21:34AM +0100, Jiri Kosina wrote:
> On configs which have CONFIG_CMA but no CONFIG_COMPACTION, 
> isolate_migratepages_range() and isolate_freepages_block() must not 
> account for COMPACTFREE_SCANNED and COMPACTISOLATED events (those 
> constants are even undefined in such case, causing a build error).
> 
> Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>

Minchan has a similar patch in the works that defines count_compact_events()
similar to count_vm_numa_events(). It just needs a small correction. The
fixed version would avoid having an #ifdef in the middle of the function
which is cosmetically a bit nicer.

-- 
Mel Gorman
SUSE Labs

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