diff options
author | Mel Gorman <mel@csn.ul.ie> | 2007-10-24 12:23:50 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2007-10-24 12:23:50 -0400 |
commit | b3da2a73ff5a2953a4ad8ebbf0aa7e6965ff9de2 (patch) | |
tree | 43583e5f492a48c56f9537006c8f806d570b0d84 /kernel/profile.c | |
parent | 838225b48edc971620cbeb292034dabd2b0d7d1d (diff) |
sched: document profile=sleep requiring CONFIG_SCHEDSTATS
profile=sleep only works if CONFIG_SCHEDSTATS is set. This patch notes
the limitation in Documentation/kernel-parameters.txt and prints a
warning at boot-time if profile=sleep is used without CONFIG_SCHEDSTAT.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/profile.c')
-rw-r--r-- | kernel/profile.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/profile.c b/kernel/profile.c index 631b75c25d7e..5e95330e5120 100644 --- a/kernel/profile.c +++ b/kernel/profile.c | |||
@@ -60,6 +60,7 @@ static int __init profile_setup(char * str) | |||
60 | int par; | 60 | int par; |
61 | 61 | ||
62 | if (!strncmp(str, sleepstr, strlen(sleepstr))) { | 62 | if (!strncmp(str, sleepstr, strlen(sleepstr))) { |
63 | #ifdef CONFIG_SCHEDSTATS | ||
63 | prof_on = SLEEP_PROFILING; | 64 | prof_on = SLEEP_PROFILING; |
64 | if (str[strlen(sleepstr)] == ',') | 65 | if (str[strlen(sleepstr)] == ',') |
65 | str += strlen(sleepstr) + 1; | 66 | str += strlen(sleepstr) + 1; |
@@ -68,6 +69,10 @@ static int __init profile_setup(char * str) | |||
68 | printk(KERN_INFO | 69 | printk(KERN_INFO |
69 | "kernel sleep profiling enabled (shift: %ld)\n", | 70 | "kernel sleep profiling enabled (shift: %ld)\n", |
70 | prof_shift); | 71 | prof_shift); |
72 | #else | ||
73 | printk(KERN_WARNING | ||
74 | "kernel sleep profiling requires CONFIG_SCHEDSTATS\n"); | ||
75 | #endif /* CONFIG_SCHEDSTATS */ | ||
71 | } else if (!strncmp(str, schedstr, strlen(schedstr))) { | 76 | } else if (!strncmp(str, schedstr, strlen(schedstr))) { |
72 | prof_on = SCHED_PROFILING; | 77 | prof_on = SCHED_PROFILING; |
73 | if (str[strlen(schedstr)] == ',') | 78 | if (str[strlen(schedstr)] == ',') |