* Two sched patchs missing from 4.4-stable: inclusion possible?
@ 2017-05-18 9:11 Ben Pineau
2017-05-18 9:35 ` Greg KH
0 siblings, 1 reply; 4+ messages in thread
From: Ben Pineau @ 2017-05-18 9:11 UTC (permalink / raw)
To: stable, linux-kernel
Hello,
The following two patches series, merged in mainline 4.7, was Cc'ed to stable@,
but somehow didn't made its way to the 4.4.x stable tree:
754bd598be9bbc953bc709a9e8ed7f3188bfb9d7
094f469172e00d6ab0a3130b0e01c83b3cf3a98d
Links to the discussions:
https://marc.info/?l=linux-kernel&m=146608185431676
https://marc.info/?l=linux-kernel&m=146608184031673
This patch series address a real life issue, ie. we're seeing an
oopsing machine about every day on a kubernetes cluster, and
other users reported the same problem, for instance :
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1687512
https://github.com/kubernetes/kops/issues/874
Those two patches are also on their way for inclusion in the current
(4.4 based) LTS Ubuntu release :
https://code.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/xenial/+ref/master-next
Could this series be considered for 4.4-stable inclusion by any chance ?
For ref, the stacktrace I'm getting on an unpatched 4.4.67 kernel:
[168797.975683] BUG: unable to handle kernel NULL pointer
dereference at 0000000000000050
[168797.976656] Call Trace:
[168797.976656] [<ffffffff810bbef5>] pick_next_task_fair+0x75/0x4b0
[168797.976656] [<ffffffff816f38a1>] __schedule+0x6c1/0x7f0
[168797.976656] [<ffffffff816f3a05>] schedule+0x35/0x80
[168797.976656] [<ffffffff816f3cee>] schedule_preempt_disabled+0xe/0x10
[168797.976656] [<ffffffff810c299a>] cpu_startup_entry+0x19a/0x360
[168797.976656] [<ffffffff810512f0>] start_secondary+0x160/0x1a0
[168797.976656] RIP [<ffffffff810b562f>] pick_next_entity+0x7f/0x160
Thanks
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Two sched patchs missing from 4.4-stable: inclusion possible?
2017-05-18 9:11 Two sched patchs missing from 4.4-stable: inclusion possible? Ben Pineau
@ 2017-05-18 9:35 ` Greg KH
2017-05-18 10:51 ` Peter Zijlstra
0 siblings, 1 reply; 4+ messages in thread
From: Greg KH @ 2017-05-18 9:35 UTC (permalink / raw)
To: Ben Pineau, Peter Zijlstra; +Cc: Ingo Molnar, stable, linux-kernel
On Thu, May 18, 2017 at 11:11:23AM +0200, Ben Pineau wrote:
> Hello,
>
> The following two patches series, merged in mainline 4.7, was Cc'ed to stable@,
> but somehow didn't made its way to the 4.4.x stable tree:
> 754bd598be9bbc953bc709a9e8ed7f3188bfb9d7
> 094f469172e00d6ab0a3130b0e01c83b3cf3a98d
>
> Links to the discussions:
> https://marc.info/?l=linux-kernel&m=146608185431676
> https://marc.info/?l=linux-kernel&m=146608184031673
>
> This patch series address a real life issue, ie. we're seeing an
> oopsing machine about every day on a kubernetes cluster, and
> other users reported the same problem, for instance :
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1687512
> https://github.com/kubernetes/kops/issues/874
>
> Those two patches are also on their way for inclusion in the current
> (4.4 based) LTS Ubuntu release :
> https://code.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/xenial/+ref/master-next
>
> Could this series be considered for 4.4-stable inclusion by any chance ?
>
> For ref, the stacktrace I'm getting on an unpatched 4.4.67 kernel:
>
> [168797.975683] BUG: unable to handle kernel NULL pointer
> dereference at 0000000000000050
> [168797.976656] Call Trace:
> [168797.976656] [<ffffffff810bbef5>] pick_next_task_fair+0x75/0x4b0
> [168797.976656] [<ffffffff816f38a1>] __schedule+0x6c1/0x7f0
> [168797.976656] [<ffffffff816f3a05>] schedule+0x35/0x80
> [168797.976656] [<ffffffff816f3cee>] schedule_preempt_disabled+0xe/0x10
> [168797.976656] [<ffffffff810c299a>] cpu_startup_entry+0x19a/0x360
> [168797.976656] [<ffffffff810512f0>] start_secondary+0x160/0x1a0
> [168797.976656] RIP [<ffffffff810b562f>] pick_next_entity+0x7f/0x160
Sure, I'll be glad to take them if I can get an ack from the patch
authors, and reviewers (added to: and cc:)...
Ingo and Peter, any objections?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Two sched patchs missing from 4.4-stable: inclusion possible?
2017-05-18 9:35 ` Greg KH
@ 2017-05-18 10:51 ` Peter Zijlstra
2017-05-23 10:27 ` Greg KH
0 siblings, 1 reply; 4+ messages in thread
From: Peter Zijlstra @ 2017-05-18 10:51 UTC (permalink / raw)
To: Greg KH; +Cc: Ben Pineau, Ingo Molnar, stable, linux-kernel
On Thu, May 18, 2017 at 11:35:00AM +0200, Greg KH wrote:
> On Thu, May 18, 2017 at 11:11:23AM +0200, Ben Pineau wrote:
> > Hello,
> >
> > The following two patches series, merged in mainline 4.7, was Cc'ed to stable@,
> > but somehow didn't made its way to the 4.4.x stable tree:
> > 754bd598be9bbc953bc709a9e8ed7f3188bfb9d7
> > 094f469172e00d6ab0a3130b0e01c83b3cf3a98d
It would be so much easier if that were normal quotes like:
754bd598be9b ("sched/fair: Do not announce throttled next buddy in dequeue_task_fair()")
094f469172e0 ("sched/fair: Initialize throttle_count for new task-groups lazily")
Then I'd not have had to look them up. And I'm most certainly not going
to click through various interweb sites to provide answers.
> Sure, I'll be glad to take them if I can get an ack from the patch
> authors, and reviewers (added to: and cc:)...
>
> Ingo and Peter, any objections?
No, those patches should be fine I think.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Two sched patchs missing from 4.4-stable: inclusion possible?
2017-05-18 10:51 ` Peter Zijlstra
@ 2017-05-23 10:27 ` Greg KH
0 siblings, 0 replies; 4+ messages in thread
From: Greg KH @ 2017-05-23 10:27 UTC (permalink / raw)
To: Peter Zijlstra; +Cc: Ben Pineau, Ingo Molnar, stable, linux-kernel
On Thu, May 18, 2017 at 12:51:03PM +0200, Peter Zijlstra wrote:
> On Thu, May 18, 2017 at 11:35:00AM +0200, Greg KH wrote:
> > On Thu, May 18, 2017 at 11:11:23AM +0200, Ben Pineau wrote:
> > > Hello,
> > >
> > > The following two patches series, merged in mainline 4.7, was Cc'ed to stable@,
> > > but somehow didn't made its way to the 4.4.x stable tree:
> > > 754bd598be9bbc953bc709a9e8ed7f3188bfb9d7
> > > 094f469172e00d6ab0a3130b0e01c83b3cf3a98d
>
> It would be so much easier if that were normal quotes like:
>
> 754bd598be9b ("sched/fair: Do not announce throttled next buddy in dequeue_task_fair()")
> 094f469172e0 ("sched/fair: Initialize throttle_count for new task-groups lazily")
>
> Then I'd not have had to look them up. And I'm most certainly not going
> to click through various interweb sites to provide answers.
>
> > Sure, I'll be glad to take them if I can get an ack from the patch
> > authors, and reviewers (added to: and cc:)...
> >
> > Ingo and Peter, any objections?
>
> No, those patches should be fine I think.
Thanks, now queued up.
greg k-h
^ permalink raw reply [flat|nested] 4+ messages in thread
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2017-05-18 9:11 Two sched patchs missing from 4.4-stable: inclusion possible? Ben Pineau
2017-05-18 9:35 ` Greg KH
2017-05-18 10:51 ` Peter Zijlstra
2017-05-23 10:27 ` Greg KH
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