* Peter Zijlstra wrote:
> On Wed, Apr 04, 2018 at 06:53:10PM +0200, Peter Zijlstra wrote:
> > Awesome, I'll go get it merged, even though I don't understand where it
> > went wobbly.
>
> Ingo, could you magic this in?
>
> ---
> Subject: sched: Force alignment of struct util_est
> From: Peter Z
On Wed, Apr 04, 2018 at 06:53:10PM +0200, Peter Zijlstra wrote:
> Awesome, I'll go get it merged, even though I don't understand where it
> went wobbly.
Ingo, could you magic this in?
---
Subject: sched: Force alignment of struct util_est
From: Peter Zijlstra
Date: Thu Apr 5 09:56:16 CEST 2018
On Wed, Apr 04, 2018 at 09:38:56AM -0700, Luck, Tony wrote:
> On Wed, Apr 04, 2018 at 09:25:13AM +0200, Peter Zijlstra wrote:
> > Right, I remember being careful with that. Which again brings me to the
> > RANDSTRUCT thing, which will mess that up.
>
> No RANDSTRUCT config options set for my build
On Wed, Apr 04, 2018 at 09:25:13AM +0200, Peter Zijlstra wrote:
> Right, I remember being careful with that. Which again brings me to the
> RANDSTRUCT thing, which will mess that up.
No RANDSTRUCT config options set for my build.
> Does the below cure things? It makes absolutely no difference for
On Wed, Apr 04, 2018 at 12:04:00AM +, Luck, Tony wrote:
> > bisect says:
> >
> > d519329f72a6 ("sched/fair: Update util_est only on util_avg updates")
> >
> > Reverting just this commit makes the problem go away.
>
> The unaligned read and write seem to come from:
>
> struct util_est ue = RE
> bisect says:
>
> d519329f72a6 ("sched/fair: Update util_est only on util_avg updates")
>
> Reverting just this commit makes the problem go away.
The unaligned read and write seem to come from:
struct util_est ue = READ_ONCE(p->se.avg.util_est);
WRITE_ONCE(p->se.avg.util_est, ue);
which is puz
On Tue, Apr 03, 2018 at 09:37:06AM +0200, Peter Zijlstra wrote:
> On Mon, Apr 02, 2018 at 04:24:49PM -0700, Luck, Tony wrote:
> > Any guesses before I start to bisect?
>
> That doesn't sound good. The only guess I have at this moment is you
> accidentially enabled RANDSTRUCT_PLUGIN and that messes
On Mon, Apr 02, 2018 at 04:24:49PM -0700, Luck, Tony wrote:
> v4.16 boots cleanly. But with the first bunch of merges
> (Linus HEAD = 46e0d28bdb8e6d00e27a0fe9e1d15df6098f0ffb)
> I see a bunch of:
>
> ia64_handle_unaligned: 4863 callbacks suppressed
> kernel unaligned access to 0xe0031660fd74,
> kernel unaligned access to 0xe0031660fd74, ip=0xa001000f23e0
> kernel unaligned access to 0xe0033bdffbcc, ip=0xa001000f2370
Here's the disassembly of dequeu_task_fair() in case it would help to see
which two instructions are getting all the faults:
a001000f21c0 :
a001000
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