diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cpuset.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 8f764de3a9e..6004719f26e 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -56,6 +56,13 @@ #define CPUSET_SUPER_MAGIC 0x27e0eb +/* + * Tracks how many cpusets are currently defined in system. + * When there is only one cpuset (the root cpuset) we can + * short circuit some hooks. + */ +int number_of_cpusets; + /* See "Frequency meter" comments, below. */ struct fmeter { @@ -1664,6 +1671,7 @@ static long cpuset_create(struct cpuset *parent, const char *name, int mode) down(&callback_sem); list_add(&cs->sibling, &cs->parent->children); + number_of_cpusets++; up(&callback_sem); err = cpuset_create_dir(cs, name, mode); @@ -1726,6 +1734,7 @@ static int cpuset_rmdir(struct inode *unused_dir, struct dentry *dentry) spin_unlock(&d->d_lock); cpuset_d_remove_dir(d); dput(d); + number_of_cpusets--; up(&callback_sem); if (list_empty(&parent->children)) check_for_release(parent, &pathbuf); @@ -1769,6 +1778,7 @@ int __init cpuset_init(void) root->d_inode->i_nlink++; top_cpuset.dentry = root; root->d_inode->i_op = &cpuset_dir_inode_operations; + number_of_cpusets = 1; err = cpuset_populate_dir(root); /* memory_pressure_enabled is in root cpuset only */ if (err == 0) @@ -1982,7 +1992,7 @@ static const struct cpuset *nearest_exclusive_ancestor(const struct cpuset *cs) * GFP_USER - only nodes in current tasks mems allowed ok. **/ -int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) +int __cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) { int node; /* node that zone z is on */ const struct cpuset *cs; /* current cpuset ancestors */ |