The patch titled
Subject: mm/zsmalloc: avoid unnecessary iteration in get_pages_per_zspage()
has been added to the -mm tree. Its filename is
mm-zsmalloc-avoid-unnecessary-iteration-in-get_pages_per_zspage.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-zsmalloc-avoid-unnecessary-iteration-in-get_pages_per_zspage.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-zsmalloc-avoid-unnecessary-iteration-in-get_pages_per_zspage.patch
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------------------------------------------------------
From: Ganesh Mahendran <opensource.ganesh@xxxxxxxxx>
Subject: mm/zsmalloc: avoid unnecessary iteration in get_pages_per_zspage()
If we find a zspage with usage == 100%, there is no need to try other
zspages.
Link: http://lkml.kernel.org/r/1462425447-13385-1-git-send-email-opensource.ganesh@xxxxxxxxx
Signed-off-by: Ganesh Mahendran <opensource.ganesh@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zsmalloc.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN mm/zsmalloc.c~mm-zsmalloc-avoid-unnecessary-iteration-in-get_pages_per_zspage mm/zsmalloc.c
--- a/mm/zsmalloc.c~mm-zsmalloc-avoid-unnecessary-iteration-in-get_pages_per_zspage
+++ a/mm/zsmalloc.c
@@ -770,6 +770,9 @@ static int get_pages_per_zspage(int clas
if (usedpc > max_usedpc) {
max_usedpc = usedpc;
max_usedpc_order = i;
+
+ if (max_usedpc == 100)
+ break;
}
}
_
Patches currently in -mm which might be from opensource.ganesh@xxxxxxxxx are
mm-zsmalloc-avoid-unnecessary-iteration-in-get_pages_per_zspage.patch
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