lkml.org 
[lkml]   [2020]   [Mar]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: rcu_sched stalls on 4.14
Hi Paul,

On Sat, Feb 29, 2020 at 8:22 PM Paul E. McKenney <paulmck@kernel.org> wrote:

> In the above stack trace, the stalled CPU (that is, CPU 0) is in the idle
> loop, correct? Then it took an interrupt and was processing softirqs
> upon return from that interrupt when it took a scheduling clock interrupt,
> which did the self-reported stall warning.
>
> Is this analysis correct?

Yes, I think so.

> If so, and assuming that this is reproducible, I suggest building your
> kernel with CONFIG_RCU_EQS_DEBUG=y, which enables additional debugging
> that might be helpful with this issue.

Will ask the reporter to try it. I haven't been able to reproduce it myself.

Thanks

\
 
 \ /
  Last update: 2020-03-03 23:42    [W:0.072 / U:1.896 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site