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| author |   Peter Zijlstra <a.p.zijlstra@chello.nl> | 2007-11-09 22:39:37 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2007-11-09 22:39:37 +0100 |
| commit | b2be5e96dc0b5a179cf4cb98e65cfb605752ca26 (patch) | |
| tree | cf229cf83afc2c30369d1751338886cf8a067b5c /kernel/sysctl.c | |
| parent | sched: documentation: place_entity() comments (diff) | |
| download | linux-dev-b2be5e96dc0b5a179cf4cb98e65cfb605752ca26.tar.xz linux-dev-b2be5e96dc0b5a179cf4cb98e65cfb605752ca26.zip | |
sched: reintroduce the sched_min_granularity tunable
we lost the sched_min_granularity tunable to a clever optimization
that uses the sched_latency/min_granularity ratio - but the ratio
is quite unintuitive to users and can also crash the kernel if the
ratio is set to 0. So reintroduce the min_granularity tunable,
while keeping the ratio maintained internally.
no functionality changed.
[ mingo@elte.hu: some fixlets. ]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to '')
| -rw-r--r-- | kernel/sysctl.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 3b4efbe26445..6e3b63c06856 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -235,11 +235,14 @@ static struct ctl_table kern_table[] = { #ifdef CONFIG_SCHED_DEBUG { .ctl_name = CTL_UNNUMBERED, - .procname = "sched_nr_latency", - .data = &sysctl_sched_nr_latency, + .procname = "sched_min_granularity_ns", + .data = &sysctl_sched_min_granularity, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec, + .proc_handler = &sched_nr_latency_handler, + .strategy = &sysctl_intvec, + .extra1 = &min_sched_granularity_ns, + .extra2 = &max_sched_granularity_ns, }, { .ctl_name = CTL_UNNUMBERED, @@ -247,7 +250,7 @@ static struct ctl_table kern_table[] = { .data = &sysctl_sched_latency, .maxlen = sizeof(unsigned int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, + .proc_handler = &sched_nr_latency_handler, .strategy = &sysctl_intvec, .extra1 = &min_sched_granularity_ns, .extra2 = &max_sched_granularity_ns, |