On Wed, 2016-02-03 at 09:55:17 UTC, Ravi Bangoria wrote:
> At a time of destroying hw_breakpoint event, kernel ends up with Oops.
> Here is the sample output from 4.5.0-rc6 kernel.
I merged the revised version, as discussed with peterz.
https://git.kernel.org/powerpc/c/fb822e6076d972691c5dd33431
On Thu, 2016-03-03 at 11:20 +0100, Peter Zijlstra wrote:
> On Thu, Mar 03, 2016 at 08:23:38PM +1100, Michael Ellerman wrote:
> > On Wed, 2016-03-02 at 12:59 +0100, Peter Zijlstra wrote:
>
> Indeed, but if there's a preemption point in between setting and using
> that state, the ctx->task pointer
On Thu, Mar 03, 2016 at 08:23:38PM +1100, Michael Ellerman wrote:
> On Wed, 2016-03-02 at 12:59 +0100, Peter Zijlstra wrote:
>
> > On Wed, Mar 02, 2016 at 10:53:24PM +1100, Michael Ellerman wrote:
>
> > > Peterz, acme, do you guys want to take this? Or should I?
> >
> > I'm not too happy its
On Wed, 2016-03-02 at 12:59 +0100, Peter Zijlstra wrote:
> On Wed, Mar 02, 2016 at 10:53:24PM +1100, Michael Ellerman wrote:
> > Peterz, acme, do you guys want to take this? Or should I?
>
> I'm not too happy its touching event->ctx at all. It really should not
> be doing that.
Hmm OK.
It's
On Wed, Mar 02, 2016 at 10:53:24PM +1100, Michael Ellerman wrote:
> Peterz, acme, do you guys want to take this? Or should I?
I'm not too happy its touching event->ctx at all. It really should not
be doing that.
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Hi Ravi,
On Wed, 2016-02-03 at 09:55:17 UTC, Ravi Bangoria wrote:
> At a time of destroying hw_breakpoint event, kernel ends up with Oops.
> Here is the sample output from 4.5.0-rc6 kernel.
It's nice to trim the oops a bit, the time stamps aren't useful. And the full
GPRs is probably not useful
On Wed, Mar 02, 2016 at 03:25:17PM +0530, Ravi Bangoria wrote:
> At a time of destroying hw_breakpoint event, kernel ends up with Oops.
> Here is the sample output from 4.5.0-rc6 kernel.
> Call chain:
>
> hw_breakpoint_event_init()
> bp->destroy = bp_perf_event_destroy;
>
> do_exit()
>
At a time of destroying hw_breakpoint event, kernel ends up with Oops.
Here is the sample output from 4.5.0-rc6 kernel.
[ 450.708568] Unable to handle kernel paging request for data at address
0x0c07
[ 450.708684] Faulting instruction address: 0xc00291d0
[ 450.708750] Oops:
