From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
Carsten Emde <C.Emde@osadl.org>
Subject: Re: [PREEMPT RT] SLUB and split softirq lock for v3.2-rt
Date: Wed, 24 Apr 2013 10:11:41 +0200 [thread overview]
Message-ID: <517793BD.30101@linutronix.de> (raw)
In-Reply-To: <1366770979.2626.3.camel@gandalf.local.home>
On 04/24/2013 04:36 AM, Steven Rostedt wrote:
> Hi Sebastian,
Hi Steven,
> Which version of 3.2-rt was this applied to. It does not apply, where
> patch 7/16 totally does not apply. I looked at the history of 3.2-rt and
> I can't find where it would apply.
I applied them on top of 2438ee33 ("Linux 3.2.37-rt55 REBASE"). I just
grabbed the patches from the mailing list and re-applied them on top of
this tree and is still works.
After doing the same thing on v3.2.43-rt63-rebase I got:
Applying: softirq: Make serving softirqs a task flag
Applying: softirq: Split handling function
Applying: softirq: Split softirq locks
Using index info to reconstruct a base tree...
Falling back to patching base and 3-way merge...
Auto-merging include/linux/sched.h
Applying: rcu: rcutiny: Prevent RCU stall
Applying: softirq: Adapt NOHZ softirq pending check to new RT scheme
Applying: softirq: Add more debugging
Applying: softirq: Fix nohz pending issue for real
Applying: net: Use local_bh_disable in netif_rx_ni()
Applying: FIX [1/2] slub: Do not dereference NULL pointer in node_match
Applying: FIX [2/2] slub: Tid must be retrieved from the percpu area of
the current processor
Applying: slub: Use correct cpu_slab on dead cpu
Applying: smp: introduce a generic on_each_cpu_mask() function
Applying: smp: add func to IPI cpus based on parameter func
Applying: slub: only IPI CPUs that have per cpu obj to flush
Applying: mm: Enable SLUB for RT
Applying: slub: Enable irqs for __GFP_WAIT
git did not complain about patch 7 ("softirq: Fix nohz pending issue for
real") but about 3 ("softirq: Split softirq locks"). The diff between
the two queues (except different sha1, index and so) is:
--- old/0003-softirq-Split-softirq-locks.patch
+++ new/0003-softirq-Split-softirq-locks.patch
@@ -60,8 +60,8 @@
int softirq_nestcnt;
+ unsigned int softirqs_raised;
#endif
- #if defined CONFIG_PREEMPT_RT_FULL && defined CONFIG_HIGHMEM
- int kmap_idx;
+ #ifdef CONFIG_PREEMPT_RT_FULL
+ # if defined CONFIG_HIGHMEM || defined CONFIG_X86_32
and this looks good.
> Thanks,
>
> -- Steve
Sebastian
next prev parent reply other threads:[~2013-04-24 8:11 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-13 16:11 [PREEMPT RT] SLUB and split softirq lock for v3.2-rt Sebastian Andrzej Siewior
2013-02-13 16:11 ` [PATCH 01/16] softirq: Make serving softirqs a task flag Sebastian Andrzej Siewior
2013-02-13 16:11 ` [PATCH 02/16] softirq: Split handling function Sebastian Andrzej Siewior
2013-02-13 16:11 ` [PATCH 03/16] softirq: Split softirq locks Sebastian Andrzej Siewior
2013-02-13 16:11 ` [PATCH 04/16] rcu: rcutiny: Prevent RCU stall Sebastian Andrzej Siewior
2013-02-16 20:59 ` Paul E. McKenney
2013-02-18 15:02 ` Steven Rostedt
2013-02-13 16:12 ` [PATCH 05/16] softirq: Adapt NOHZ softirq pending check to new RT scheme Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 06/16] softirq: Add more debugging Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 07/16] softirq: Fix nohz pending issue for real Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 08/16] net: Use local_bh_disable in netif_rx_ni() Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 09/16] FIX [1/2] slub: Do not dereference NULL pointer in node_match Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 10/16] FIX [2/2] slub: Tid must be retrieved from the percpu area of the current processor Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 11/16] slub: Use correct cpu_slab on dead cpu Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 12/16] smp: introduce a generic on_each_cpu_mask() function Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 13/16] smp: add func to IPI cpus based on parameter func Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 14/16] slub: only IPI CPUs that have per cpu obj to flush Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 15/16] mm: Enable SLUB for RT Sebastian Andrzej Siewior
2013-02-13 16:12 ` [PATCH 16/16] slub: Enable irqs for __GFP_WAIT Sebastian Andrzej Siewior
2013-02-13 17:24 ` [PREEMPT RT] SLUB and split softirq lock for v3.2-rt Steven Rostedt
2013-02-13 17:41 ` Thomas Gleixner
2013-02-19 1:54 ` Li Zefan
2013-02-19 1:56 ` Li Zefan
2013-02-19 4:06 ` Steven Rostedt
2013-02-19 6:17 ` Mike Galbraith
2013-04-24 2:36 ` Steven Rostedt
2013-04-24 8:11 ` Sebastian Andrzej Siewior [this message]
2013-04-24 15:45 ` Steven Rostedt
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