Messages in this thread |  | | | Date | Mon, 26 Nov 2007 21:29:39 +0100 | | From | Ingo Molnar <> | | Subject | Re: [Patch 4/4] sched: Improve fairness of cpu bandwidth allocation for task groups |
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* Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> wrote:
> +static inline void lock_doms_cur(void) > +{ > + mutex_lock(&doms_cur_mutex); > +} > + > +static inline void unlock_doms_cur(void) > +{ > + mutex_unlock(&doms_cur_mutex); > +} > + > #else > > static inline void set_task_cfs_rq(struct task_struct *p, unsigned int cpu) { } > static inline void lock_task_group_list(void) { } > static inline void unlock_task_group_list(void) { } > +static inline void lock_doms_cur(void) { } > +static inline void unlock_doms_cur(void) { } > > #endif /* CONFIG_FAIR_GROUP_SCHED */ > > @@ -6546,6 +6605,8 @@ > { > int i, j; > > + lock_doms_cur(); > + > /* always unregister in case we don't destroy any domains */ > unregister_sched_domain_sysctl(); > > @@ -6586,6 +6647,8 @@ > ndoms_cur = ndoms_new; > > register_sched_domain_sysctl(); > + > + unlock_doms_cur(); > }
this API and locking should be introduced in a separate patch first, to reduce the size and impact of the 4/4 patch.
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