diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2008-10-31 16:18:02 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-10-31 16:18:02 +0900 |
| commit | 0803d540db06f53acd2fabf1347d5b665218f14a (patch) | |
| tree | f5f8e5510a76bb59d3583478961daf5afc32df08 /init | |
| parent | a8884e3415c29c58a5875d54c109c4a7fcaa6fb4 (diff) | |
| parent | 721d5dfe7e516954c501d5e9d0dfab379cf4241a (diff) | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 16 | ||||
| -rw-r--r-- | init/do_mounts_md.c | 2 |
2 files changed, 11 insertions, 7 deletions
diff --git a/init/Kconfig b/init/Kconfig index 44e9208f9c7..86b00c53fad 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -401,16 +401,20 @@ config CGROUP_MEM_RES_CTLR depends on CGROUPS && RESOURCE_COUNTERS select MM_OWNER help - Provides a memory resource controller that manages both page cache and - RSS memory. + Provides a memory resource controller that manages both anonymous + memory and page cache. (See Documentation/controllers/memory.txt) Note that setting this option increases fixed memory overhead - associated with each page of memory in the system by 4/8 bytes - and also increases cache misses because struct page on many 64bit - systems will not fit into a single cache line anymore. + associated with each page of memory in the system. By this, + 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory + usage tracking struct at boot. Total amount of this is printed out + at boot. Only enable when you're ok with these trade offs and really - sure you need the memory resource controller. + sure you need the memory resource controller. Even when you enable + this, you can set "cgroup_disable=memory" at your boot option to + disable memory resource controller and you can avoid overheads. + (and lose benefits of memory resource contoller) This config option also selects MM_OWNER config option, which could in turn add some fork/exit overhead. diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c index 4c87ee1fe5d..4d42f450b59 100644 --- a/init/do_mounts_md.c +++ b/init/do_mounts_md.c @@ -1,4 +1,4 @@ - +#include <linux/delay.h> #include <linux/raid/md.h> #include <linux/delay.h> |