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Memory Resource Controller use strstrip while parsing arguments 

The memory controller has a requirement that while writing values, we need
to use echo -n. This patch fixes the problem and makes the UI more consistent.

Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Balbir Singh 2008-03-04 14:28:24 -08:00 committed by Linus Torvalds
parent a10568733c
commit fb78922ce9
2 changed files with 4 additions and 3 deletions
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6
Documentation/controllers/memory.txt
View File

@ -164,7 +164,7 @@ c. Enable CONFIG_CGROUP_MEM_CONT
Since now we're in the 0 cgroup,
We can alter the memory limit:
# echo -n 4M > /cgroups/0/memory.limit_in_bytes
# echo 4M > /cgroups/0/memory.limit_in_bytes
NOTE: We can use a suffix (k, K, m, M, g or G) to indicate values in kilo,
mega or gigabytes.
@ -185,7 +185,7 @@ number of factors, such as rounding up to page boundaries or the total
availability of memory on the system. The user is required to re-read
this file after a write to guarantee the value committed by the kernel.
# echo -n 1 > memory.limit_in_bytes
# echo 1 > memory.limit_in_bytes
# cat memory.limit_in_bytes
4096
@ -197,7 +197,7 @@ caches, RSS and Active pages/Inactive pages are shown.
The memory.force_empty gives an interface to drop *all* charges by force.
# echo -n 1 > memory.force_empty
# echo 1 > memory.force_empty
will drop all charges in cgroup. Currently, this is maintained for test.

1
kernel/res_counter.c
View File

@ -113,6 +113,7 @@ ssize_t res_counter_write(struct res_counter *counter, int member,
ret = -EINVAL;
strstrip(buf);
if (write_strategy) {
if (write_strategy(buf, &tmp)) {
goto out_free;