diff options
| author | Sergey Senozhatsky <senozhatsky@chromium.org> | 2023-01-18 01:52:09 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-03 07:33:23 +0100 |
| commit | 4ff93b292c0b91b9a7c9fb54643f122bbe59d8d0 (patch) | |
| tree | a36d556a6791f114d710da25d592a71fa8f4ed03 /mm/Kconfig | |
| parent | zsmalloc: skip chain size calculation for pow_of_2 classes (diff) | |
| download | linux-4ff93b292c0b91b9a7c9fb54643f122bbe59d8d0.tar.xz linux-4ff93b292c0b91b9a7c9fb54643f122bbe59d8d0.zip | |
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/Kconfig')
| -rw-r--r-- | mm/Kconfig | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 39df30dcabe3..83b1d278b31c 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -191,6 +191,25 @@ config ZSMALLOC_STAT information to userspace via debugfs. If unsure, say N. +config ZSMALLOC_CHAIN_SIZE + int "Maximum number of physical pages per-zspage" + default 4 + range 4 16 + depends on ZSMALLOC + help + This option sets the upper limit on the number of physical pages + that a zmalloc page (zspage) can consist of. The optimal zspage + chain size is calculated for each size class during the + initialization of the pool. + + Changing this option can alter the characteristics of size classes, + such as the number of pages per zspage and the number of objects + per zspage. This can also result in different configurations of + the pool, as zsmalloc merges size classes with similar + characteristics. + + For more information, see zsmalloc documentation. + menu "SLAB allocator options" choice |