On Thu, Jul 16, 2015 at 09:02:25AM +0900, Sergey Senozhatsky wrote: > On (07/16/15 08:42), Minchan Kim wrote: > > There is no need to recalcurate pages_per_zspage in runtime. > > Just use class->pages_per_zspage to avoid unnecessary runtime > > overhead. > > > > Signed-off-by: Minchan Kim <[email protected]> > > --- > > mm/zsmalloc.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c > > index 27b9661c8fa6..154a30e9c8a8 100644 > > --- a/mm/zsmalloc.c > > +++ b/mm/zsmalloc.c > > @@ -1711,7 +1711,7 @@ static unsigned long zs_can_compact(struct size_class > > *class) > > obj_wasted /= get_maxobj_per_zspage(class->size, > > class->pages_per_zspage); > > > > - return obj_wasted * get_pages_per_zspage(class->size); > > + return obj_wasted * class->pages_per_zspage; > > } > > plus __zs_compact(): > > @@ -1761,8 +1761,7 @@ static void __zs_compact(struct zs_pool *pool, struct > size_class *class) > > putback_zspage(pool, class, dst_page); > if (putback_zspage(pool, class, src_page) == ZS_EMPTY) > - pool->stats.pages_compacted += > - get_pages_per_zspage(class->size); > + pool->stats.pages_compacted += > class->pages_per_zspage; > spin_unlock(&class->lock); > cond_resched(); > spin_lock(&class->lock); > > -ss
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