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| author | Michal Hocko <mhocko@suse.cz> | 2011-02-01 15:52:30 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-02-02 16:03:18 -0800 |
| commit | fceda1bf498677501befc7da72fd2e4de7f18466 (patch) | |
| tree | c23057e5368fc00b0f1c662ea9bd4b3b123c370c /mm | |
| parent | afe8a887550f7cc24eb16449670b93f6b43c32d8 (diff) | |
| download | linux-stable-fceda1bf498677501befc7da72fd2e4de7f18466.tar.gz linux-stable-fceda1bf498677501befc7da72fd2e4de7f18466.tar.bz2 linux-stable-fceda1bf498677501befc7da72fd2e4de7f18466.zip | |
memsw: handle swapaccount kernel parameter correctly
__setup based kernel command line parameters handlers which are handled in
obsolete_checksetup are provided with the parameter value including =
(more precisely everything right after the parameter name).
This means that the current implementation of swapaccount[=1|0] doesn't
work at all because if there is a value for the parameter then we are
testing for "0" resp. "1" but we are getting "=0" resp. "=1" and if
there is no parameter value we are getting an empty string rather than
NULL.
The original noswapccount parameter, which doesn't care about the value,
works correctly.
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 3878cfe399dc..44f9f9c89f0c 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5024,9 +5024,9 @@ struct cgroup_subsys mem_cgroup_subsys = { static int __init enable_swap_account(char *s) { /* consider enabled if no parameter or 1 is given */ - if (!s || !strcmp(s, "1")) + if (!(*s) || !strcmp(s, "=1")) really_do_swap_account = 1; - else if (!strcmp(s, "0")) + else if (!strcmp(s, "=0")) really_do_swap_account = 0; return 1; } @@ -5034,7 +5034,7 @@ __setup("swapaccount", enable_swap_account); static int __init disable_swap_account(char *s) { - enable_swap_account("0"); + enable_swap_account("=0"); return 1; } __setup("noswapaccount", disable_swap_account); |