* The timer softirq on the RT kernel
[not found] ` <DDCAE26804250545B9934A2056554AA021106A54@ORSMSX112.amr.corp.intel.com>
@ 2016-08-05 0:36 ` yunhong jiang
2016-08-05 2:36 ` Mike Galbraith
0 siblings, 1 reply; 3+ messages in thread
From: yunhong jiang @ 2016-08-05 0:36 UTC (permalink / raw)
To: umgwanakikbuti; +Cc: linux-kernel, linux-rt-users, rostedt
Hi,Mike & Steven
On https://lkml.org/lkml/2015/3/24/1178, the patch of "timers:
do not raise softirq unconditionally" is reverted. Thanks for Steven's
detailed comments, it's quite clear explained.
I remember Mike has a patch trying to fix it but late
abandoned. Do you still have any plan to work on this? Otherwise, I
will have a try.
Thanks
--jyh
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: The timer softirq on the RT kernel
2016-08-05 0:36 ` The timer softirq on the RT kernel yunhong jiang
@ 2016-08-05 2:36 ` Mike Galbraith
2016-08-05 20:17 ` yunhong jiang
0 siblings, 1 reply; 3+ messages in thread
From: Mike Galbraith @ 2016-08-05 2:36 UTC (permalink / raw)
To: yunhong jiang; +Cc: linux-kernel, linux-rt-users, rostedt
On Thu, 2016-08-04 at 17:36 -0700, yunhong jiang wrote:
> Hi,Mike & Steven
> On https://lkml.org/lkml/2015/3/24/1178, the patch of "timers:
> do not raise softirq unconditionally" is reverted. Thanks for
> Steven's
> detailed comments, it's quite clear explained.
> I remember Mike has a patch trying to fix it but late
> abandoned. Do you still have any plan to work on this? Otherwise, I
> will have a try.
Sebastian converted the lock to raw in -rt, so nohz_full now works
without any extra hackery.
-Mike
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: The timer softirq on the RT kernel
2016-08-05 2:36 ` Mike Galbraith
@ 2016-08-05 20:17 ` yunhong jiang
0 siblings, 0 replies; 3+ messages in thread
From: yunhong jiang @ 2016-08-05 20:17 UTC (permalink / raw)
To: Mike Galbraith; +Cc: linux-kernel, linux-rt-users, rostedt
On Fri, 05 Aug 2016 04:36:23 +0200
Mike Galbraith <umgwanakikbuti@gmail.com> wrote:
> On Thu, 2016-08-04 at 17:36 -0700, yunhong jiang wrote:
> > Hi,Mike & Steven
> > On https://lkml.org/lkml/2015/3/24/1178, the patch of
> > "timers: do not raise softirq unconditionally" is reverted. Thanks
> > for Steven's
> > detailed comments, it's quite clear explained.
> > I remember Mike has a patch trying to fix it but late
> > abandoned. Do you still have any plan to work on this? Otherwise, I
> > will have a try.
>
> Sebastian converted the lock to raw in -rt, so nohz_full now works
> without any extra hackery.
Hi, Mike, thanks for reply and the update. I still noticed timer softirq
on my isolated CPUs, possibly something wrong on my environment. I will
re-check it.
Thanks
--jyh
>
> -Mike
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-08-05 0:36 ` The timer softirq on the RT kernel yunhong jiang
2016-08-05 2:36 ` Mike Galbraith
2016-08-05 20:17 ` yunhong jiang
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