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

[Peter Zijlstra]

On Thu, 2012-02-09 at 18:32 -0800, Steven Noonan wrote:
> [   88.517599]  [<ffffffff81085a86>] smp_call_function_single+0xec/0xfd

This looks like its waiting for an IPI to complete.. 

There's no actual BUGS or WARNs in the output, just the soft lockup
thing saying things are taking a bit of time (clearly 15s waiting for an
IPI isn't quite normal).

I've no idea why this wouldn't work on Xen, nor do the trace have any
Xen specific muck in them.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/