Re: bisected: 'perf top' causing soft lockups under Xen

Arnaldo Carvalho de Melo
2012-02-10T19:29:10Z

Em Fri, Feb 10, 2012 at 11:27:23AM -0800, Steven Noonan escreveu:
> > [  160.172856] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
> > [  160.172984] iwlwifi 0000:02:00.0: Radio type=0x1-0x2-0x0
>
> It actually gets even more interesting. Once I did 'perf test' under
> Xen, and I waited for it to finish, perf suddenly works fine. I can
> re-run 'perf test -v 3' with no hangs, and can now run 'perf top' with
> no issue. Bizarre.

Heck, I keep wishing people use perf test more often to figure out bugs
sooner, but this side effect was surprising! ;-)

- Arnaldo