Messages in this thread |  | | Date | Thu, 16 Nov 2006 12:23:58 -0800 | From | Andrew Morton <> | Subject | Re: [discuss] Re: 2.6.19-rc5: known regressions (v3) |
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On Thu, 16 Nov 2006 11:55:46 +0100 Mikael Pettersson <mikpe@it.uu.se> wrote:
> Andrew Morton writes: > > Surely the appropriate behaviour is to allow oprofile to steal the NMI and > > to then put the NMI back to doing the watchdog thing after oprofile has > > finished with it. > > Which is _exactly_ what pre-2.6.19-rc1 kernels did. I implemented > the in-kernel API allowing real performance counter drivers like > oprofile (and perfctr) to claim the HW from the NMI watchdog, > do their work, and then release it which resumed the watchdog.
OK. But from Andi's comments it seems that the NMI watchdog was failing to resume its operation.
> Note that oprofile (and perfctr) didn't do anything behind the > NMI watchdog's back. They went via the API. Nothing dodgy going on. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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