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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-11-26 19:42:08 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-11-26 19:42:08 -0800
commit0685ab4fb8e527639d9867df60d49dccba85d842 (patch)
tree7d7db22548b95da9555afec2889a9e8efa2053d9
parentff1ea52fa317a5658b6415b25169c5e531f54876 (diff)
parentf7b9329e556a8bdb9e07292cddbbe484c7a2b8c5 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: sched: bump version of kernel/sched_debug.c sched: fix minimum granularity tunings sched: fix RLIMIT_CPU comment sched: fix kernel/acct.c comment sched: fix prev_stime calculation sched: don't forget to unlock uids_mutex on error paths
-rw-r--r--fs/proc/array.c4
-rw-r--r--include/asm-generic/resource.h2
-rw-r--r--kernel/acct.c2
-rw-r--r--kernel/sched_debug.c2
-rw-r--r--kernel/sched_fair.c12
-rw-r--r--kernel/user.c7
6 files changed, 18 insertions, 11 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index eba339ecba2..65c62e1bfd6 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -374,7 +374,9 @@ static cputime_t task_stime(struct task_struct *p)
stime = nsec_to_clock_t(p->se.sum_exec_runtime) -
cputime_to_clock_t(task_utime(p));
- p->prev_stime = max(p->prev_stime, clock_t_to_cputime(stime));
+ if (stime >= 0)
+ p->prev_stime = max(p->prev_stime, clock_t_to_cputime(stime));
+
return p->prev_stime;
}
#endif
diff --git a/include/asm-generic/resource.h b/include/asm-generic/resource.h
index cfe3692b23e..a4a22cc3589 100644
--- a/include/asm-generic/resource.h
+++ b/include/asm-generic/resource.h
@@ -12,7 +12,7 @@
* then it defines them prior including asm-generic/resource.h. )
*/
-#define RLIMIT_CPU 0 /* CPU time in ms */
+#define RLIMIT_CPU 0 /* CPU time in sec */
#define RLIMIT_FSIZE 1 /* Maximum filesize */
#define RLIMIT_DATA 2 /* max data size */
#define RLIMIT_STACK 3 /* max stack size */
diff --git a/kernel/acct.c b/kernel/acct.c
index fce53d8df8a..cf19547cc9e 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -413,7 +413,7 @@ static u32 encode_float(u64 value)
* The acct_process() call is the workhorse of the process
* accounting system. The struct acct is built here and then written
* into the accounting file. This function should only be called from
- * do_exit().
+ * do_exit() or when switching to a different output file.
*/
/*
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index ca198a797bf..5d0d623a546 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -199,7 +199,7 @@ static int sched_debug_show(struct seq_file *m, void *v)
u64 now = ktime_to_ns(ktime_get());
int cpu;
- SEQ_printf(m, "Sched Debug Version: v0.06-v22, %s %.*s\n",
+ SEQ_printf(m, "Sched Debug Version: v0.07, %s %.*s\n",
init_utsname()->release,
(int)strcspn(init_utsname()->version, " "),
init_utsname()->version);
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index ee00da284b1..2f16e15c022 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -22,7 +22,7 @@
/*
* Targeted preemption latency for CPU-bound tasks:
- * (default: 20ms * ilog(ncpus), units: nanoseconds)
+ * (default: 20ms * (1 + ilog(ncpus)), units: nanoseconds)
*
* NOTE: this latency value is not the same as the concept of
* 'timeslice length' - timeslices in CFS are of variable length
@@ -36,14 +36,14 @@ unsigned int sysctl_sched_latency = 20000000ULL;
/*
* Minimal preemption granularity for CPU-bound tasks:
- * (default: 1 msec * ilog(ncpus), units: nanoseconds)
+ * (default: 4 msec * (1 + ilog(ncpus)), units: nanoseconds)
*/
-unsigned int sysctl_sched_min_granularity = 1000000ULL;
+unsigned int sysctl_sched_min_granularity = 4000000ULL;
/*
* is kept at sysctl_sched_latency / sysctl_sched_min_granularity
*/
-static unsigned int sched_nr_latency = 20;
+static unsigned int sched_nr_latency = 5;
/*
* After fork, child runs first. (default) If set to 0 then
@@ -61,7 +61,7 @@ unsigned int __read_mostly sysctl_sched_compat_yield;
/*
* SCHED_BATCH wake-up granularity.
- * (default: 10 msec * ilog(ncpus), units: nanoseconds)
+ * (default: 10 msec * (1 + ilog(ncpus)), units: nanoseconds)
*
* This option delays the preemption effects of decoupled workloads
* and reduces their over-scheduling. Synchronous workloads will still
@@ -71,7 +71,7 @@ unsigned int sysctl_sched_batch_wakeup_granularity = 10000000UL;
/*
* SCHED_OTHER wake-up granularity.
- * (default: 10 msec * ilog(ncpus), units: nanoseconds)
+ * (default: 10 msec * (1 + ilog(ncpus)), units: nanoseconds)
*
* This option delays the preemption effects of decoupled workloads
* and reduces their over-scheduling. Synchronous workloads will still
diff --git a/kernel/user.c b/kernel/user.c
index 0f3aa023410..8320a87f3e5 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -337,8 +337,11 @@ struct user_struct * alloc_uid(struct user_namespace *ns, uid_t uid)
struct user_struct *new;
new = kmem_cache_alloc(uid_cachep, GFP_KERNEL);
- if (!new)
+ if (!new) {
+ uids_mutex_unlock();
return NULL;
+ }
+
new->uid = uid;
atomic_set(&new->__count, 1);
atomic_set(&new->processes, 0);
@@ -355,6 +358,7 @@ struct user_struct * alloc_uid(struct user_namespace *ns, uid_t uid)
if (alloc_uid_keyring(new, current) < 0) {
kmem_cache_free(uid_cachep, new);
+ uids_mutex_unlock();
return NULL;
}
@@ -362,6 +366,7 @@ struct user_struct * alloc_uid(struct user_namespace *ns, uid_t uid)
key_put(new->uid_keyring);
key_put(new->session_keyring);
kmem_cache_free(uid_cachep, new);
+ uids_mutex_unlock();
return NULL;
}