r
Cc: Chris Metcalf
Cc: Ingo Molnar
Cc: Luiz Capitulino
Cc: Peter Zijlstra
Cc: Rik van Riel
Cc: Thomas Gleixner
Cc: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
kernel/sched/rt.c| 34 ++
kernel/sched/sched.h | 2 ++
2 files changed, 36 insertions(+)
Gleixner
Cc: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
kernel/sched/clock.c | 5 +
kernel/time/tick-sched.c | 26 ++
2 files changed, 11 insertions(+), 20 deletions(-)
diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c
index c0a2051..1389e1a
r
Cc: Chris Metcalf
Cc: Ingo Molnar
Cc: Luiz Capitulino
Cc: Peter Zijlstra
Cc: Rik van Riel
Cc: Thomas Gleixner
Cc: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
include/linux/perf_event.h | 6 --
kernel/events/core.c | 22 +++---
kernel/time/tick-sched.c
HEAD: ca9e998d0be7e6ef1ffab888436cbabf5446c865
Thanks,
Frederic
---
Frederic Weisbecker (7):
atomic: Export fetch_or()
nohz: New tick dependency mask
perf: Migrate perf to use new tick dependency mask model
sched: Account rr and fifo tasks separately
sched: Migrate sched to use new
On Thu, Nov 12, 2015 at 12:59:04PM -0800, Andy Lutomirski wrote:
> On CONFIG_CONTEXT_TRACKING kernels that have context tracking
> disabled at runtime (which includes most distro kernels), we still
> have the overhead of a call to enter_from_user_mode in interrupt and
> exception entries.
>
> If j
On Tue, Nov 10, 2015 at 08:43:17AM +, Hiroshi Shimamoto wrote:
> > Subject: Re: [PATCH v3 1/2] cputime: fix invalid gtime in proc
> >
> > On Mon, Nov 02, 2015 at 05:13:51PM +0100, Peter Zijlstra wrote:
> > > On Fri, Oct 30, 2015 at 12:46:39AM +, Hiroshi Shimamoto wrote:
> > > > +++ b/kerne
On Mon, Sep 28, 2015 at 11:48:16AM -0700, Yunhong Jiang wrote:
> Currently, when a new timer added to timer wheel for a nohz_active CPU,
> the target CPU will always be waked up.
>
> In fact, if the new added timer is after the base->next_timer, we don't
> need wake up the target CPU since it will
On Fri, Nov 13, 2015 at 05:10:28PM +0100, Peter Zijlstra wrote:
> On Fri, Nov 13, 2015 at 04:33:01PM +0100, Frederic Weisbecker wrote:
> > Peter, if you have doubts, I can integrate this change in a larger
> > series that does a proper cleanup. But this very patch will still need
&
On Mon, Nov 16, 2015 at 11:10:55AM -0800, Andy Lutomirski wrote:
> On Nov 13, 2015 7:26 AM, "Frederic Weisbecker" wrote:
> >
> > On Thu, Nov 12, 2015 at 12:59:04PM -0800, Andy Lutomirski wrote:
> > > On CONFIG_CONTEXT_TRACKING kernels that have context trackin
On Fri, Sep 25, 2015 at 05:52:37PM +0900, byungchul.p...@lge.com wrote:
> From: Byungchul Park
>
> hello,
>
> i have already sent this patch about 1 month ago.
> (see https://lkml.org/lkml/2015/8/13/160)
>
> now, i am resending the same patch with adding some additional commit
> message.
>
>
On Fri, Jul 10, 2015 at 02:05:56PM -0500, Christoph Lameter wrote:
> On Fri, 10 Jul 2015, Frederic Weisbecker wrote:
>
> > Note that nohz full is perfectly fine with that. The issue I'm worried about
> > is the case where drivers spawn hundreds of jobs and it all happen on
: Rik van Riel
Cc: Thomas Gleixner
Cc: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
arch/x86/kernel/apm_32.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 927ec92..052c9c3 100644
--- a/arch/x86/kernel/apm
k.
Signed-off-by: Chris Metcalf
Cc: Christoph Lameter
Cc: Ingo Molnar
Cc: Peter Zijlstra
Cc: Preeti U Murthy
Cc: Rik van Riel
Cc: Thomas Gleixner
Cc: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
drivers/net/ethernet/tile/tilegx.c | 4 +++-
include/linux/tick.h | 9 ++
re-v3
HEAD: 572536be5b8e84c507d66203f53faa0ae2c8c244
Thanks,
Frederic
---
Frederic Weisbecker (3):
jiffies: Remove HZ > USEC_PER_SEC special case
apm32: Fix cputime == jiffies assumption
alpha: Fix jiffies based cputime assumption
Chris Metcalf (1):
nohz: Preven
Kokshaysky
Cc: Christoph Lameter
Cc: Ingo Molnar
Cc; John Stultz
Cc: Peter Zijlstra
Cc: Preeti U Murthy
Cc: Rik van Riel
Cc: Thomas Gleixner
Cc: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
arch/alpha/kernel/osf_sys.c | 13 +
1 file changed, 9 insertions(+), 4 deletions
: Preeti U Murthy
Cc: Rik van Riel
Cc: Thomas Gleixner
Cc: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
include/linux/jiffies.h | 9 +
kernel/time/time.c | 10 +++---
2 files changed, 8 insertions(+), 11 deletions(-)
diff --git a/include/linux/jiffies.h b/include
ode to supply a function that does what we
> want (and can be much simpler than user_exit), which will enable
> us to get rid of the extra call.
>
> Signed-off-by: Andy Lutomirski
> Cc: Andy Lutomirski
> Cc: Borislav Petkov
> Cc: Brian Gerst
> Cc: Denys Vlasenko
&
ed-off-by: Andy Lutomirski
> Cc: Andy Lutomirski
> Cc: Borislav Petkov
> Cc: Brian Gerst
> Cc: Denys Vlasenko
> Cc: Denys Vlasenko
> Cc: Frederic Weisbecker
> Cc: H. Peter Anvin
> Cc: Kees Cook
> Cc: Linus Torvalds
> Cc: Oleg Nesterov
> Cc: Peter Zijlstra
>
n Gerst
> Cc: Denys Vlasenko
> Cc: Denys Vlasenko
> Cc: Frederic Weisbecker
> Cc: H. Peter Anvin
> Cc: Kees Cook
> Cc: Linus Torvalds
> Cc: Oleg Nesterov
> Cc: Paul E. McKenney
> Cc: Peter Zijlstra
> Cc: Rik van Riel
> Cc: Thomas Gle
On Tue, Jul 14, 2015 at 04:04:47PM -0700, Andy Lutomirski wrote:
> On Tue, Jul 14, 2015 at 4:00 PM, Frederic Weisbecker
> wrote:
> > On Tue, Jul 07, 2015 at 03:51:29AM -0700, tip-bot for Andy Lutomirski wrote:
> >> Commit-ID: feed36cde0a10adb957445a37e48f957f30b2273
> &
Thanks,
Frederic
---
Frederic Weisbecker (7):
nohz: Move nohz full init call to tick init
irq_work: Force raised irq work to run on irq work interrupt
x86: Tell irq work about self IPI support
arm: Tell irq work about self IPI support
arm64: Tell irq work about
advice and pseudo code from Oleg Nesterov
Signed-off-by: Jacob Shin
Signed-off-by: Suravee Suthikulpanit
Acked-by: Jiri Olsa
Reviewed-by: Oleg Nesterov
Cc: Arnaldo Carvalho de Melo
Cc: Ingo Molnar
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: xiakaixu
Signed-off-by: Frederic Weisbecker
---
arch
From: Jacob Shin
Signed-off-by: Jacob Shin
Signed-off-by: Suravee Suthikulpanit
Acked-by: Jiri Olsa
Reviewed-by: Oleg Nesterov
Cc: Arnaldo Carvalho de Melo
Cc: Ingo Molnar
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: xiakaixu
Signed-off-by: Frederic Weisbecker
---
tools/perf/tests/parse
: Suravee Suthikulpanit
Acked-by: Jiri Olsa
Reviewed-by: Oleg Nesterov
Cc: Arnaldo Carvalho de Melo
Cc: Ingo Molnar
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: xiakaixu
Signed-off-by: Frederic Weisbecker
---
tools/perf/Documentation/perf-record.txt | 7 +--
tools/perf/util/parse-events.c
Ingo,
Please pull the perf/core-v2 branch that can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
perf/core-v2
HEAD: 33252c1bb36dd7405f412a9ef8fc05dec995064a
It has been acked by Jiri and Oleg.
---
Summary:
* Extend breakpoint tools and core to s
-off-by: Frederic Weisbecker
---
arch/x86/kernel/hw_breakpoint.c | 25 +
1 file changed, 1 insertion(+), 24 deletions(-)
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index 91ce081..edb70e9 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b
On Wed, Jul 30, 2014 at 10:23:34AM -0700, Andy Lutomirski wrote:
> On Wed, Jul 30, 2014 at 9:43 AM, Frederic Weisbecker
> wrote:
> > On Tue, Jul 29, 2014 at 09:32:32PM +0200, Oleg Nesterov wrote:
> >> On 07/28, Andy Lutomirski wrote:
> >> >
> >> > @@
Hi Thomas,
The tick reschedules itself unconditionally. That's what we want as long
as the CPU is in periodic mode. It's not that relevant when the CPU
is in dynticks mode though as the clock write is likely to be overwritten
by the nohz code on irq exit.
In low-res mode, that even result in unex
deric Weisbecker
Signed-off-by: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
kernel/time/tick-sched.c | 4
1 file changed, 4 insertions(+)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index b07ba8e..a7098f7 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sc
This also removes a needless clockevent write on idle ticks. Since those
clock write are usually considered to be slow, it's a general win.
Reviewed-by: Preeti U Murthy
Signed-off-by: Viresh Kumar
Signed-off-by: Frederic Weisbecker
---
kernel/time/tick-sched.c | 4
1 file changed, 4 inse
On Thu, Jul 31, 2014 at 06:42:46PM +0200, Oleg Nesterov wrote:
> On 07/31, Frederic Weisbecker wrote:
> >
> > On Wed, Jul 30, 2014 at 10:23:34AM -0700, Andy Lutomirski wrote:
> > >
> > > At the end of the day, the syscall slowpath code calls a bunch of
> >
On Thu, Jul 31, 2014 at 06:03:53PM +0200, Oleg Nesterov wrote:
> On 07/31, Frederic Weisbecker wrote:
> >
> > On Wed, Jul 30, 2014 at 07:46:30PM +0200, Oleg Nesterov wrote:
> > > On 07/30, Frederic Weisbecker wrote:
> > > >
> > > > On Tue, Jul 2
On Thu, Jul 31, 2014 at 06:54:23PM +0200, Oleg Nesterov wrote:
> On 07/31, Frederic Weisbecker wrote:
> >
> > On Thu, Jul 31, 2014 at 06:42:46PM +0200, Oleg Nesterov wrote:
> > > On 07/31, Frederic Weisbecker wrote:
> > > >
> > > > On Wed, Jul 30,
On Thu, Jul 31, 2014 at 09:56:48AM -0700, H. Peter Anvin wrote:
> On 07/30/2014 10:25 AM, Andy Lutomirski wrote:
> >
> > And yet x86_64 has this code implemented in assembly even in the
> > slowpath. Go figure.
> >
>
> There is way too much assembly in entry_64.S probably because things
> have
On Thu, Jul 31, 2014 at 08:12:30PM +0200, Oleg Nesterov wrote:
> On 07/31, Frederic Weisbecker wrote:
> >
> > On Thu, Jul 31, 2014 at 06:03:53PM +0200, Oleg Nesterov wrote:
> > > On 07/31, Frederic Weisbecker wrote:
> > > >
> > > > I was convinced th
2014-07-31 20:47 GMT+02:00 Frederic Weisbecker :
> On Thu, Jul 31, 2014 at 08:12:30PM +0200, Oleg Nesterov wrote:
>> On 07/31, Frederic Weisbecker wrote:
> No, because preempt_schedule_irq() does the ctx_state save and restore with
> exception_enter/exception_exit.
Similar thi
On Thu, Jul 31, 2014 at 02:55:01PM -0700, Paul E. McKenney wrote:
> From: "Paul E. McKenney"
>
> This commit adds a new RCU-tasks flavor of RCU, which provides
> call_rcu_tasks(). This RCU flavor's quiescent states are voluntary
> context switch (not preemption!), userspace execution, and the id
On Thu, Jul 31, 2014 at 07:04:16PM -0700, Paul E. McKenney wrote:
> On Fri, Aug 01, 2014 at 01:57:50AM +0200, Frederic Weisbecker wrote:
> >
> > So this thread is going to poll every second? I guess something prevents it
> > to run when system is idle somewhere? But I&#x
On Fri, Aug 01, 2014 at 01:16:05PM -0400, Chris Metcalf wrote:
> On 7/31/2014 9:39 PM, Lai Jiangshan wrote:
> >On 08/01/2014 12:09 AM, Chris Metcalf wrote:
> >>On 7/31/2014 7:51 AM, Michal Hocko wrote:
> >>>On Thu 31-07-14 11:30:19, Lai Jiangshan wrote:
> It is suggested that cpumask_var_t and
On Fri, Aug 01, 2014 at 04:48:14PM +0200, Denys Vlasenko wrote:
> A define, two macros and an unreferenced bit of assembly are gone.
>
> Signed-off-by: Denys Vlasenko
> CC: Oleg Nesterov
> CC: "H. Peter Anvin"
> CC: Andy Lutomirski
Acked-by: Frederic Weisbecker
irski
One macro dissolved == one Hop-o'-My-Thumb pebble less to drop before taking
a jump on the editor.
Acked-by: Frederic Weisbecker
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo
> (four instances).
>
> Patch was run-tested: 64-bit executables, 32-bit executables,
> strace works.
>
> Signed-off-by: Denys Vlasenko
> CC: Oleg Nesterov
> CC: "H. Peter Anvin"
> CC: Andy Lutomirski
> CC: Frederic Weisbecker
> CC: X86 ML
&g
On Fri, Aug 01, 2014 at 04:48:17PM +0200, Denys Vlasenko wrote:
>
> /* 0(%rsp): ~(interrupt number) */
> .macro interrupt func
> - /* reserve pt_regs for scratch regs and rbp */
> - subq $ORIG_RAX-RBP, %rsp
> - CFI_ADJUST_CFA_OFFSET ORIG_RAX-RBP
> - cld
> - /* start fro
-by: Frederic Weisbecker
---
arch/x86/include/asm/Kbuild | 1 -
arch/x86/include/asm/irq_work.h | 11 +++
arch/x86/kernel/irq_work.c | 2 +-
3 files changed, 12 insertions(+), 2 deletions(-)
create mode 100644 arch/x86/include/asm/irq_work.h
diff --git a/arch/x86/include/asm
h support isn't
available.
As a side effect, this makes sure that nohz kick is never called from
the tick. That otherwise would result in illegal hrtimer self-cancellation
and lockup.
Cc: Ingo Molnar
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Signed-off-by: Frederic Wei
to warnings when
fundamental allocations fail.
Cc: Ingo Molnar
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Signed-off-by: Frederic Weisbecker
---
kernel/time/tick-sched.c | 38 +++---
1 file changed, 19 insertions(+), 19 deletions(-)
diff
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: Will Deacon
Signed-off-by: Frederic Weisbecker
---
arch/arm64/include/asm/Kbuild | 1 -
arch/arm64/include/asm/irq_work.h | 11 +++
arch/arm64/include/asm/smp.h | 2 ++
arch/arm64/kernel/smp.c | 2 +-
4 files changed, 14
: Ingo Molnar
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Signed-off-by: Frederic Weisbecker
---
arch/alpha/include/asm/Kbuild | 1 +
arch/arc/include/asm/Kbuild| 1 +
arch/arm/include/asm/Kbuild| 1 +
arch/arm64/include/asm/Kbuild | 3 ++-
arch
ARM irq work IPI support depends on SMP support. That information is
partly known at early boottime. Lets implement
arch_irq_work_has_interrupt() accordingly.
Cc: Ingo Molnar
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Russell King
Cc: Thomas Gleixner
Signed-off-by: Frederic Weisbecker
Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Signed-off-by: Frederic Weisbecker
---
include/linux/irq_work.h | 1 +
kernel/irq_work.c| 13 +++--
kernel/time/timer.c | 2 +-
3 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/include/linux/irq_work.h b/in
initialize the pointer to __smp_call_function.
Since tick_init() is called right after init_IRQ(), this is a good place
to call tick_nohz_init() and prepare for that dependency.
Cc: Ingo Molnar
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Signed-off-by: Frederic Weisbecker
---
include
general agreement before testing
more seriously.
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
nohz/fixes-v2
HEAD: 863bea6acd4c9151f9be2fa623e8fee588d4e58c
Thanks,
Frederic
---
Frederic Weisbecker (7):
nohz: Move nohz full init call to tick init
xes-v2
>
> commit 664c05b9ab2dd92aad807bd7f9aa273955949abe
> Author: Frederic Weisbecker
> AuthorDate: Sun Aug 17 22:02:55 2014 +0200
> Commit: Frederic Weisbecker
> CommitDate: Wed Sep 10 18:52:45 2014 +0200
>
> nohz: Consolidate nohz full init code
>
> The supports for C
On Thu, Sep 11, 2014 at 11:54:34PM +0100, David Howells wrote:
>
> Whilst trying to use docker, I'm occasionally seeing the attached deadlock in
> user time accounting, with a page fault in the middle. The relevant lines
> from the pre-fault bits of stack:
>
> [] ? cpuacct_account_field+0x
On Fri, Sep 12, 2014 at 05:18:02AM +0800, Fengguang Wu wrote:
> Hi Frederic,
>
> On Thu, Sep 11, 2014 at 05:53:19PM +0200, Frederic Weisbecker wrote:
> > Hi,
> >
> > On Thu, Sep 11, 2014 at 03:17:04PM +0800, Fengguang Wu wrote:
> > > Greetings,
> >
On Thu, Sep 11, 2014 at 10:28:12AM +0200, Peter Zijlstra wrote:
> On Wed, Sep 10, 2014 at 11:33:20PM +0200, Frederic Weisbecker wrote:
>
> > Frederic Weisbecker (7):
> > nohz: Move nohz full init call to tick init
> > irq_work: Force raised irq work to r
On Thu, Sep 11, 2014 at 10:00:37AM +0100, Catalin Marinas wrote:
> On Wed, Sep 10, 2014 at 10:33:26PM +0100, Frederic Weisbecker wrote:
> > ARM64 irq work self-IPI support depends on __smp_cross_call to point to
> > some relevant IRQ controller operations. This information should b
rcu_preempt_state in favor of rcu_state_p.
>
> Signed-off-by: Paul E. McKenney
Acked-by: Frederic Weisbecker
>
> diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
> index 24f5bd54ca9b..e31fa71c4d3a 100644
> --- a/kernel/rcu/tree_plugin.h
> +++ b/kernel/r
will need to be revisited if nohz_full= state
> can ever be changed at runtime.
>
> Signed-off-by: Paul E. McKenney
Acked-by: Frederic Weisbecker
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kerne
On Fri, Jul 25, 2014 at 11:14:13AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Jul 25, 2014 at 01:34:26PM +0200, Jiri Olsa escreveu:
> > On Thu, Jul 24, 2014 at 06:34:51PM -0300, Arnaldo Carvalho de Melo wrote:
> > > I think both changes are OK, but should be split in different patches,
>
>
On Mon, Jul 21, 2014 at 11:12:55AM -0700, Paul E. McKenney wrote:
> On Sat, Jul 19, 2014 at 02:44:17AM +0200, Frederic Weisbecker wrote:
> > The nohz full timekeeper is always CPU 0. Lets add it to the list of
> > special tick_do_timer_cpu symbols for more self explanatory code.
&g
On Fri, Jul 25, 2014 at 08:10:57PM -0400, Pranith Kumar wrote:
> On 07/25/2014 07:36 PM, Paul E. McKenney wrote:
> > [ Note: This applies on top of commit 187497fa5e9e (rcu: Allow for NULL
> > tick_nohz_full_mask when nohz_full= missing) in -tip
> > or -rcu. To make this work on top of rcu
On Tue, Sep 30, 2014 at 01:40:11PM -0400, Rik van Riel wrote:
> On Tue, 30 Sep 2014 13:56:37 +0200
> Arnd Bergmann wrote:
>
> > A recent change to update the stime/utime members of task_struct
> > using atomic cmpxchg broke configurations on 32-bit machines with
> > CONFIG_VIRT_CPU_ACCOUNTING_GEN
On Wed, Aug 13, 2014 at 05:03:24PM -0400, Rik van Riel wrote:
> --- a/kernel/time/posix-cpu-timers.c
> +++ b/kernel/time/posix-cpu-timers.c
> @@ -272,22 +272,8 @@ static int posix_cpu_clock_get_task(struct task_struct
> *tsk,
> if (same_thread_group(tsk, current))
>
2014-08-14 3:57 GMT+02:00 Rik van Riel :
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> On 08/13/2014 08:43 PM, Frederic Weisbecker wrote:
>> On Wed, Aug 13, 2014 at 05:03:24PM -0400, Rik van Riel wrote:
>>> --- a/kernel/time/posix-cpu-timers.c +++
>>&
2014-08-14 15:22 GMT+02:00 Oleg Nesterov :
> On 08/13, Rik van Riel wrote:
>>
>> On Wed, 13 Aug 2014 20:45:11 +0200
>> Oleg Nesterov wrote:
>>
>> > That said, it is not that I am really sure that seqcount_t in ->signal
>> > is actually worse, not to mention that this is subjective anyway. IOW,
>>
2014-08-14 16:39 GMT+02:00 Oleg Nesterov :
> On 08/14, Frederic Weisbecker wrote:
>>
>> 2014-08-14 3:57 GMT+02:00 Rik van Riel :
>> > -BEGIN PGP SIGNED MESSAGE-
>> > Hash: SHA1
>> >
>> > On 08/13/2014 08:43 PM, Frederic Weisbecker wrote:
On Fri, Aug 15, 2014 at 04:26:01PM +0200, Oleg Nesterov wrote:
> On 08/15, Frederic Weisbecker wrote:
> >
> > 2014-08-14 16:39 GMT+02:00 Oleg Nesterov :
> > > On 08/14, Frederic Weisbecker wrote:
> > >>
> > >> I mean the read side doesn't use a
On Mon, Aug 04, 2014 at 05:03:42AM +0200, Denys Vlasenko wrote:
> On Sat, Aug 2, 2014 at 1:19 AM, Frederic Weisbecker
> wrote:
> >> CFI_ESCAPE 0x0f /* DW_CFA_def_cfa_expression */, 6, \
> >> 0x77 /* DW_OP_breg7 */, 0, \
> &g
Ping?
On Thu, Jul 31, 2014 at 06:45:54PM +0200, Frederic Weisbecker wrote:
> Hi Thomas,
>
> The tick reschedules itself unconditionally. That's what we want as long
> as the CPU is in periodic mode. It's not that relevant when the CPU
> is in dynticks mode though as the
On Thu, Oct 09, 2014 at 06:34:26AM -0400, Linus Torvalds wrote:
> Hmm..
>
> On Thu, Oct 9, 2014 at 2:48 AM, Ingo Molnar wrote:
> >
> > Please pull the latest timers-nohz-for-linus git tree from:
> >
> >git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
> > timers-nohz-for-linus
> >
>
On Thu, Oct 09, 2014 at 03:50:18PM +1100, Stephen Rothwell wrote:
> Hi all,
>
> Today's linux-next merge of the percpu tree got a conflict in
> kernel/irq_work.c between commit 76a33061b932 ("irq_work: Force raised
> irq work to run on irq work interrupt") from the tip tree and commit
> 22127e93c5
On Thu, Oct 09, 2014 at 09:15:12AM -0400, Tejun Heo wrote:
> On Thu, Oct 09, 2014 at 03:13:31PM +0200, Frederic Weisbecker wrote:
> > On Thu, Oct 09, 2014 at 03:50:18PM +1100, Stephen Rothwell wrote:
> > > Hi all,
> > >
> > > Today's linux-next m
On Thu, Oct 09, 2014 at 06:50:04AM -0700, Greg KH wrote:
> On Thu, Oct 09, 2014 at 02:57:25PM +0200, Frederic Weisbecker wrote:
> > On Thu, Oct 09, 2014 at 06:34:26AM -0400, Linus Torvalds wrote:
> > > Hmm..
> > >
> > > On Thu, Oct 9, 2014 at 2:48 AM, Ingo M
on,
> and by removing NR_CPUS from smp_plat.h.
>
> Fixes: 3631073659d0 ("arm64: Tell irq work about self IPI support")
> Cc: Frederic Weisbecker
> Signed-off-by: Guenter Roeck
That looks good to me.
Note, ARM64 is one of the archs I couldn't test due to the lack of
On Fri, Oct 23, 2015 at 10:49:51AM +0200, Peter Zijlstra wrote:
> On Fri, Oct 23, 2015 at 04:33:02AM +0200, Frederic Weisbecker wrote:
> > I personally (and I think this is the general LKML behaviour) use
> > in-reply-to
> > when I post a single patch that is a fix
On Wed, Oct 21, 2015 at 04:16:31PM +0530, Viresh Kumar wrote:
> Cc'ing Frederic.
>
> On 20-10-15, 15:47, Yunhong Jiang wrote:
> > On Sun, Oct 11, 2015 at 08:12:39PM +0200, Thomas Gleixner wrote:
> > > On Mon, 28 Sep 2015, Yunhong Jiang wrote:
> > > > static void internal_add_timer(struct tvec_bas
On Sat, Oct 10, 2015 at 12:24:39PM -0700, Paul E. McKenney wrote:
> On Sat, Oct 10, 2015 at 10:14:25PM +0300, Meelis Roos wrote:
> > Short summary: turning on CONFIG_NO_HZ_FULL_ALL seems to disable all
> > non-boot CPUs for scheduler.
> >
> > A couple of days ago I noticed that make -j8 on a 4-co
oph Lameter
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Dave Jones
Cc: Oleg Nesterov
Cc: Paul E. McKenney
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Alexey Dobriyan
Cc: Andrew Morton
Signed-off-by: Frederic Weisbecker
---
kernel/sched/core.c | 3 ---
1 file changed, 3 deletions(-)
diff --git
rruth
> Cc: David Ahern
> Cc: Frederic Weisbecker
> Cc: Jiri Olsa
> Cc: Namhyung Kim
> Cc: Stephane Eranian
> Cc: Wang Nan
> Link: https://www.youtube.com/watch?v=nXaxk27zwlk
> Link: http://lkml.kernel.org/n/tip-v8lq36aispvdwgxdmt9p9...@git.kernel.org
> Signed-of
On Mon, Oct 12, 2015 at 08:32:02AM -0700, Paul E. McKenney wrote:
> On Mon, Oct 12, 2015 at 05:21:23PM +0200, Frederic Weisbecker wrote:
> > This reverts commit 8cb9764fc88b41db11f251e8b2a0d006578b7eb4.
> >
> > We assumed that nohz full users always want scheduler isolation
On Mon, Oct 12, 2015 at 12:55:24PM -0400, Chris Metcalf wrote:
> On 10/12/2015 12:53 PM, Paul E. McKenney wrote:
>
> Is it worth starting to think about grouping things under the
> "task isolation" model somehow? "task_isolation_cpus=1-31"
> or some such for this, and then that just sets up the n
On Mon, Oct 05, 2015 at 10:15:55AM +0200, Peter Zijlstra wrote:
> On Sun, Oct 04, 2015 at 03:58:19PM +0900, Byungchul Park wrote:
> > anyway, it's wrong for update_process_times() to assume 1 tick because
> > tick_irq_exit() -> tick_nohz_irq_exit() -> tick_nohz_full_update_tick()
> > -> tick_nohz_r
On Mon, Oct 12, 2015 at 12:45:08PM -0500, Christoph Lameter wrote:
> On Mon, 12 Oct 2015, Frederic Weisbecker wrote:
>
> > But yeah if you guys want to create a new parameter that gathers nohz
> > and isolcpus I think we can.
>
> Could we also add the rcu settings?
Ye
On Mon, Oct 12, 2015 at 10:52:08AM -0700, Paul E. McKenney wrote:
> On Mon, Oct 12, 2015 at 12:45:08PM -0500, Christoph Lameter wrote:
> > On Mon, 12 Oct 2015, Frederic Weisbecker wrote:
> >
> > > But yeah if you guys want to create a new parameter that gathers nohz
>
On Tue, Oct 13, 2015 at 09:04:36AM +0200, Peter Zijlstra wrote:
> On Mon, Oct 12, 2015 at 07:45:35PM +0200, Frederic Weisbecker wrote:
> > > I think it will take more than a single patch to rework all of
> > > update_process_times(). And we should also ask Thomas for his opini
On Tue, Oct 13, 2015 at 05:37:18PM +0900, Byungchul Park wrote:
> > > find out the pending updates from update_process_times() itself and pass
> > > it to scheduler_tick() which is the one interested in it.
> >
> > tick_nohz_handler() calls tick_sched_handler() ?!
> >
> > And tick_nohz_handler()
unning,
breaking the static key optimizations.
This could be optimized with pulling irq_enter/exit to low level irq
code but that requires more thoughts.
Signed-off-by: Frederic Weisbecker
---
arch/x86/entry/common.c | 11 ++-
arch/x86/entry/entry_64.S | 11 ++-
2 files ch
On Mon, Nov 02, 2015 at 05:13:51PM +0100, Peter Zijlstra wrote:
> On Fri, Oct 30, 2015 at 12:46:39AM +, Hiroshi Shimamoto wrote:
> > +++ b/kernel/sched/cputime.c
> > @@ -786,6 +786,9 @@ cputime_t task_gtime(struct task_struct *t)
> > unsigned int seq;
> > cputime_t gtime;
> >
> > +
On Tue, Sep 15, 2015 at 11:15:29PM +0200, Arnd Bergmann wrote:
> On Tuesday 15 September 2015 10:06:07 Peter Zijlstra wrote:
> > > diff --git a/include/uapi/linux/hw_breakpoint.h
> > > b/include/uapi/linux/hw_breakpoint.h
> > > index b04000a2296a..7a6a5a7f9511 100644
> > > --- a/include/uapi/linux
On Thu, Sep 10, 2015 at 03:58:26PM -0400, Luiz Capitulino wrote:
> It's only called by tick_nohz_init().
>
> Signed-off-by: Luiz Capitulino
> ---
> kernel/time/tick-sched.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched
On Thu, Sep 10, 2015 at 03:58:27PM -0400, Luiz Capitulino wrote:
> tick_nohz_full_kick_cpu() performs the same check.
>
> Signed-off-by: Luiz Capitulino
> ---
> kernel/sched/sched.h | 20 +---
> 1 file changed, 9 insertions(+), 11 deletions(-)
>
> diff --git a/kernel/sched/sched
On Fri, Sep 11, 2015 at 10:19:47AM +0800, Boqun Feng wrote:
> Subject: [PATCH 01/27] rcu: Don't disable preemption for Tiny and Tree RCU
> readers
>
> Because preempt_disable() maps to barrier() for non-debug builds,
> it forces the compiler to spill and reload registers. Because Tree
> RCU and
On Mon, Sep 28, 2015 at 11:17:17AM -0400, Chris Metcalf wrote:
> diff --git a/include/linux/isolation.h b/include/linux/isolation.h
> new file mode 100644
> index ..fd04011b1c1e
> --- /dev/null
> +++ b/include/linux/isolation.h
> @@ -0,0 +1,24 @@
> +/*
> + * Task isolation related globa
On Thu, Oct 01, 2015 at 02:18:42PM +0200, Thomas Gleixner wrote:
> On Thu, 1 Oct 2015, Frederic Weisbecker wrote:
> > On Mon, Sep 28, 2015 at 11:17:17AM -0400, Chris Metcalf wrote:
> > > +
> > > + while (READ_ONCE(dev->next_event.tv64) != KTIME_MAX) {
> >
&
t; without this commit it won't be possible to use the task_isolation
> > mode at all.
> >
> > Removing the 1-second cap was previously discussed (see link
> > below) and Thomas Gleixner observed that vruntime, load balancing
> > data, load accounting, and other t
gt;
> Signed-off-by: Peter Zijlstra (Intel)
Reviewed-by: Frederic Weisbecker
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
On Wed, Sep 30, 2015 at 09:10:41AM +0200, Peter Zijlstra wrote:
> Now that nothing tests for PREEMPT_ACTIVE anymore, stop setting it.
>
> Reviewed-by: Thomas Gleixner
> Reviewed-by: Steven Rostedt
> Signed-off-by: Peter Zijlstra (Intel)
Great news!
Reviewed-by: Frederic We
On Wed, Sep 30, 2015 at 09:10:43AM +0200, Peter Zijlstra wrote:
> Since we stopped setting PREEMPT_ACTIVE, there is no need to mask it
> out of preempt_count() tests.
>
> Reviewed-by: Thomas Gleixner
> Reviewed-by: Steven Rostedt
> Signed-off-by: Peter Zijlstra (Intel)
Rev
Thomas Gleixner
> Signed-off-by: Peter Zijlstra (Intel)
Reviewed-by: Frederic Weisbecker
Good news as well.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.or
2401 - 2500 of 4554 matches
Mail list logo
