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authorChristian Ehrhardt <ehrhardt@linux.vnet.ibm.com>2009-11-30 12:16:48 +0100
committerIngo Molnar <mingo@elte.hu>2009-12-09 10:04:02 +0100
commitacb4a848da821a095ae9e4d8b22ae2d9633ba5cd (patch)
tree152efff68841e554eb71c82a97d3ed9571352581 /kernel/sched_fair.c
parent1983a922a1bc843806b9a36cf3a370b242783140 (diff)
downloadop-kernel-dev-acb4a848da821a095ae9e4d8b22ae2d9633ba5cd.zip
op-kernel-dev-acb4a848da821a095ae9e4d8b22ae2d9633ba5cd.tar.gz
sched: Update normalized values on user updates via proc
The normalized values are also recalculated in case the scaling factor changes. This patch updates the internally used scheduler tuning values that are normalized to one cpu in case a user sets new values via sysfs. Together with patch 2 of this series this allows to let user configured values scale (or not) to cpu add/remove events taking place later. Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1259579808-11357-4-git-send-email-ehrhardt@linux.vnet.ibm.com> [ v2: fix warning ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_fair.c')
-rw-r--r--kernel/sched_fair.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 455106d..804a411 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -399,11 +399,12 @@ static struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)
*/
#ifdef CONFIG_SCHED_DEBUG
-int sched_nr_latency_handler(struct ctl_table *table, int write,
+int sched_proc_update_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos)
{
int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
+ int factor = get_update_sysctl_factor();
if (ret || !write)
return ret;
@@ -411,6 +412,14 @@ int sched_nr_latency_handler(struct ctl_table *table, int write,
sched_nr_latency = DIV_ROUND_UP(sysctl_sched_latency,
sysctl_sched_min_granularity);
+#define WRT_SYSCTL(name) \
+ (normalized_sysctl_##name = sysctl_##name / (factor))
+ WRT_SYSCTL(sched_min_granularity);
+ WRT_SYSCTL(sched_latency);
+ WRT_SYSCTL(sched_wakeup_granularity);
+ WRT_SYSCTL(sched_shares_ratelimit);
+#undef WRT_SYSCTL
+
return 0;
}
#endif
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