diff options
| author | Paul Jackson <pj@sgi.com> | 2006-01-08 01:01:55 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:13:44 -0800 |
| commit | 909d75a3b77bdd8baa9429bad3b69a654d2954ce (patch) | |
| tree | f9955ff697b7569fc75e5b8683d886315f34ac49 /kernel/cpuset.c | |
| parent | cf2a473c4089aa41c26f653200673f5a4cc25047 (diff) | |
[PATCH] cpuset: implement cpuset_mems_allowed
Provide a cpuset_mems_allowed() method, which the sys_migrate_pages() code
needed, to obtain the mems_allowed vector of a cpuset, and replaced the
workaround in sys_migrate_pages() to call this new method.
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/cpuset.c')
| -rw-r--r-- | kernel/cpuset.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index e9917d71628..0d0dbbd6560 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -1871,14 +1871,14 @@ void cpuset_exit(struct task_struct *tsk) * tasks cpuset. **/ -cpumask_t cpuset_cpus_allowed(const struct task_struct *tsk) +cpumask_t cpuset_cpus_allowed(struct task_struct *tsk) { cpumask_t mask; down(&callback_sem); - task_lock((struct task_struct *)tsk); + task_lock(tsk); guarantee_online_cpus(tsk->cpuset, &mask); - task_unlock((struct task_struct *)tsk); + task_unlock(tsk); up(&callback_sem); return mask; @@ -1890,6 +1890,29 @@ void cpuset_init_current_mems_allowed(void) } /** + * cpuset_mems_allowed - return mems_allowed mask from a tasks cpuset. + * @tsk: pointer to task_struct from which to obtain cpuset->mems_allowed. + * + * Description: Returns the nodemask_t mems_allowed of the cpuset + * attached to the specified @tsk. Guaranteed to return some non-empty + * subset of node_online_map, even if this means going outside the + * tasks cpuset. + **/ + +nodemask_t cpuset_mems_allowed(struct task_struct *tsk) +{ + nodemask_t mask; + + down(&callback_sem); + task_lock(tsk); + guarantee_online_mems(tsk->cpuset, &mask); + task_unlock(tsk); + up(&callback_sem); + + return mask; +} + +/** * cpuset_zonelist_valid_mems_allowed - check zonelist vs. curremt mems_allowed * @zl: the zonelist to be checked * |