diff options
| author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2009-04-03 01:57:47 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-03 04:04:56 +0200 |
| commit | 627991a20b3f4d504d20466ab405fe035cb1a20a (patch) | |
| tree | ac1d7e0bc0881cf31c72ab1f830de904d52ef13e /init | |
| parent | cgroups: use css id in swap cgroup for saving memory v5 (diff) | |
| download | linux-627991a20b3f4d504d20466ab405fe035cb1a20a.tar.xz linux-627991a20b3f4d504d20466ab405fe035cb1a20a.zip | |
memcg: remove redundant message at swapon
It's pointed out that swap_cgroup's message at swapon() is nonsense.
Because
* It can be calculated very easily if all necessary information is
written in Kconfig.
* It's not necessary to annoying people at every swapon().
In other view, now, memory usage per swp_entry is reduced to 2bytes from
8bytes(64bit) and I think it's reasonably small.
Reported-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index 14c483d2b7c9..92d410603932 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -597,6 +597,8 @@ config CGROUP_MEM_RES_CTLR_SWAP is disabled by boot option, this will be automatically disabled and there will be no overhead from this. Even when you set this config=y, if boot option "noswapaccount" is set, swap will not be accounted. + Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page + size is 4096bytes, 512k per 1Gbytes of swap. endif # CGROUPS |