diff options
| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2023-01-18 09:52:09 +0900 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-02 22:33:23 -0800 |
| commit | 4ff93b292c0b91b9a7c9fb54643f122bbe59d8d0 (patch) | |
| tree | a36d556a6791f114d710da25d592a71fa8f4ed03 /mm/zsmalloc.c | |
| parent | e1d1f3546913ae0af9da31df8183a6f3da0cd590 (diff) | |
zsmalloc: make zspage chain size configurable
Remove hard coded limit on the maximum number of physical pages
per-zspage.
This will allow tuning of zsmalloc pool as zspage chain size changes
`pages per-zspage` and `objects per-zspage` characteristics of size
classes which also affects size classes clustering (the way size classes
are merged).
Link: https://lkml.kernel.org/r/20230118005210.2814763-4-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>
Diffstat (limited to 'mm/zsmalloc.c')
| -rw-r--r-- | mm/zsmalloc.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 7b904f9bed70..3aed46ab7e6c 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -73,13 +73,6 @@ */ #define ZS_ALIGN 8 -/* - * A single 'zspage' is composed of up to 2^N discontiguous 0-order (single) - * pages. ZS_MAX_ZSPAGE_ORDER defines upper limit on N. - */ -#define ZS_MAX_ZSPAGE_ORDER 2 -#define ZS_MAX_PAGES_PER_ZSPAGE (_AC(1, UL) << ZS_MAX_ZSPAGE_ORDER) - #define ZS_HANDLE_SIZE (sizeof(unsigned long)) /* @@ -136,10 +129,13 @@ #define HUGE_BITS 1 #define FULLNESS_BITS 2 #define CLASS_BITS 8 -#define ISOLATED_BITS 3 +#define ISOLATED_BITS 5 #define MAGIC_VAL_BITS 8 #define MAX(a, b) ((a) >= (b) ? (a) : (b)) + +#define ZS_MAX_PAGES_PER_ZSPAGE (_AC(CONFIG_ZSMALLOC_CHAIN_SIZE, UL)) + /* ZS_MIN_ALLOC_SIZE must be multiple of ZS_ALIGN */ #define ZS_MIN_ALLOC_SIZE \ MAX(32, (ZS_MAX_PAGES_PER_ZSPAGE << PAGE_SHIFT >> OBJ_INDEX_BITS)) |