* Re: rwsem exit_to_usermode
[not found] ` <CALCETrV21Y_ugoX-vTFpnTJyd1_7FSmYB+JOMtEZPuQ7UqUANQ@mail.gmail.com>
@ 2016-02-11 20:03 ` Oleg Nesterov
0 siblings, 0 replies; only message in thread
From: Oleg Nesterov @ 2016-02-11 20:03 UTC (permalink / raw)
To: Andy Lutomirski; +Cc: Justin Capella, Andrew Lutomirski, linux-kernel
On 02/10, Andy Lutomirski wrote:
>
> On Wed, Feb 10, 2016 at 5:05 PM, Justin Capella <justincapella@gmail.com> wrote:
> > http://i.imgur.com/gKamNV3.jpg
> >
> > I encountered this deadlock situation, let me know if there is additional
> > info I can provide, if you're interested...
>
> You're the second person in 24 hours to privately report a bug in that code :-/
Let me add lkml,
> This looks like it's a signal thing, not an entry/exit thing, though.
Looks like someone holds cgroup_threadgroup_rwsem for writing.
Which kernel version? It would be nice to look at sysrq-T output...
Oleg.
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