diff options
| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2023-01-18 03:52:08 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-03 09:33:23 +0300 |
| commit | e1d1f3546913ae0af9da31df8183a6f3da0cd590 (patch) | |
| tree | 17b2e297362a6300267820fdc3f1f843663d5c6c | |
| parent | 6260ae3583456808dceb4d78077e6388c49ca6d7 (diff) | |
| download | linux-e1d1f3546913ae0af9da31df8183a6f3da0cd590.tar.xz | |
zsmalloc: skip chain size calculation for pow_of_2 classes
If a class size is power of 2 then it wastes no memory and the best
configuration is 1 physical page per-zspage.
Link: https://lkml.kernel.org/r/20230118005210.2814763-3-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/zsmalloc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 00ab4cca49e4..7b904f9bed70 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -2370,6 +2370,9 @@ static int calculate_zspage_chain_size(int class_size) int i, min_waste = INT_MAX; int chain_size = 1; + if (is_power_of_2(class_size)) + return chain_size; + for (i = 1; i <= ZS_MAX_PAGES_PER_ZSPAGE; i++) { int waste; |