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Date: Fri, 18 Nov 2011 20:57:01 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
cc: linux-rt-users <linux-rt-users@...r.kernel.org>
Subject: [ANNOUNCE] 3.2-rc2-rt3
Dear RT Folks,
I'm pleased to announce the 3.2-rc2-rt3 release. There is no
intermediate release as the rc1-rt2 patch applies cleanly to rc2.
NOTE: Releases are back to www.kernel.org - the intermediate tglx.de
release URL is history!
Changes vs. 3.2-rc1-rt2:
* Refreshed the device mapper patch (fixes the NORT typo)
* Trace padding fix (Steven Rostedt)
* memcg preemptability fix (Johannes Weimer)
The incremental patch against 3.2-rc1-rt2 can be found here:
http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/incr/patch-3.2-rc2-rt2-rt3.patch.bz2
and is also appended below.
The RT patch against 3.2-rc2 can be found here:
http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/patch-3.2-rc2-rt3.patch.bz2
The split quilt queue is available at:
http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/patches-3.2-rc2-rt3.tar.bz2
Enjoy,
tglx
---
Index: linux-3.2/drivers/md/dm.c
===================================================================
--- linux-3.2.orig/drivers/md/dm.c
+++ linux-3.2/drivers/md/dm.c
@@ -1648,14 +1648,14 @@ static void dm_request_fn(struct request
if (map_request(ti, clone, md))
goto requeued;
- BUG_ON_NORT(!irqs_disabled());
+ BUG_ON_NONRT(!irqs_disabled());
spin_lock(q->queue_lock);
}
goto out;
requeued:
- BUG_ON_NORT(!irqs_disabled());
+ BUG_ON_NONRT(!irqs_disabled());
spin_lock(q->queue_lock);
delay_and_out:
Index: linux-3.2/kernel/trace/trace_events.c
===================================================================
--- linux-3.2.orig/kernel/trace/trace_events.c
+++ linux-3.2/kernel/trace/trace_events.c
@@ -117,7 +117,7 @@ static int trace_define_common_fields(vo
__common_field(unsigned char, preempt_count);
__common_field(int, pid);
__common_field(unsigned short, migrate_disable);
- __common_field(int, padding);
+ __common_field(unsigned short, padding);
return ret;
}
Index: linux-3.2/localversion-rt
===================================================================
--- linux-3.2.orig/localversion-rt
+++ linux-3.2/localversion-rt
@@ -1 +1 @@
--rt2
+-rt3
Index: linux-3.2/mm/memcontrol.c
===================================================================
--- linux-3.2.orig/mm/memcontrol.c
+++ linux-3.2/mm/memcontrol.c
@@ -683,37 +683,32 @@ static unsigned long mem_cgroup_nr_lru_p
return total;
}
-static bool __memcg_event_check(struct mem_cgroup *memcg, int target)
+static bool mem_cgroup_event_ratelimit(struct mem_cgroup *memcg,
+ enum mem_cgroup_events_target target)
{
unsigned long val, next;
val = __this_cpu_read(memcg->stat->events[MEM_CGROUP_EVENTS_COUNT]);
next = __this_cpu_read(memcg->stat->targets[target]);
/* from time_after() in jiffies.h */
- return ((long)next - (long)val < 0);
-}
-
-static void __mem_cgroup_target_update(struct mem_cgroup *memcg, int target)
-{
- unsigned long val, next;
-
- val = __this_cpu_read(memcg->stat->events[MEM_CGROUP_EVENTS_COUNT]);
-
- switch (target) {
- case MEM_CGROUP_TARGET_THRESH:
- next = val + THRESHOLDS_EVENTS_TARGET;
- break;
- case MEM_CGROUP_TARGET_SOFTLIMIT:
- next = val + SOFTLIMIT_EVENTS_TARGET;
- break;
- case MEM_CGROUP_TARGET_NUMAINFO:
- next = val + NUMAINFO_EVENTS_TARGET;
- break;
- default:
- return;
+ if ((long)next - (long)val < 0) {
+ switch (target) {
+ case MEM_CGROUP_TARGET_THRESH:
+ next = val + THRESHOLDS_EVENTS_TARGET;
+ break;
+ case MEM_CGROUP_TARGET_SOFTLIMIT:
+ next = val + SOFTLIMIT_EVENTS_TARGET;
+ break;
+ case MEM_CGROUP_TARGET_NUMAINFO:
+ next = val + NUMAINFO_EVENTS_TARGET;
+ break;
+ default:
+ break;
+ }
+ __this_cpu_write(memcg->stat->targets[target], next);
+ return true;
}
-
- __this_cpu_write(memcg->stat->targets[target], next);
+ return false;
}
/*
@@ -724,25 +719,27 @@ static void memcg_check_events(struct me
{
preempt_disable();
/* threshold event is triggered in finer grain than soft limit */
- if (unlikely(__memcg_event_check(memcg, MEM_CGROUP_TARGET_THRESH))) {
+ if (unlikely(mem_cgroup_event_ratelimit(memcg,
+ MEM_CGROUP_TARGET_THRESH))) {
+ bool do_softlimit, do_numainfo;
+
+ do_softlimit = mem_cgroup_event_ratelimit(memcg,
+ MEM_CGROUP_TARGET_SOFTLIMIT);
+#if MAX_NUMNODES > 1
+ do_numainfo = mem_cgroup_event_ratelimit(memcg,
+ MEM_CGROUP_TARGET_NUMAINFO);
+#endif
+ preempt_enable();
+
mem_cgroup_threshold(memcg);
- __mem_cgroup_target_update(memcg, MEM_CGROUP_TARGET_THRESH);
- if (unlikely(__memcg_event_check(memcg,
- MEM_CGROUP_TARGET_SOFTLIMIT))) {
+ if (unlikely(do_softlimit))
mem_cgroup_update_tree(memcg, page);
- __mem_cgroup_target_update(memcg,
- MEM_CGROUP_TARGET_SOFTLIMIT);
- }
#if MAX_NUMNODES > 1
- if (unlikely(__memcg_event_check(memcg,
- MEM_CGROUP_TARGET_NUMAINFO))) {
+ if (unlikely(do_numainfo))
atomic_inc(&memcg->numainfo_events);
- __mem_cgroup_target_update(memcg,
- MEM_CGROUP_TARGET_NUMAINFO);
- }
#endif
- }
- preempt_enable();
+ } else
+ preempt_enable();
}
static struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont)
--
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