On Wed, Jun 13, 2018 at 10:43:24AM +0200, Peter Zijlstra wrote: > On Tue, Jun 12, 2018 at 05:57:34PM -0700, Ricardo Neri wrote: > > The current default implementation of the hardlockup detector assumes that > > it is implemented using perf events. > > The sparc and powerpc things are very much not using perf. Isn't it true that the current hardlockup detector (under kernel/watchdog_hld.c) is based on perf? As far as I understand, this hardlockup detector is constructed using perf events for architectures that don't provide an NMI watchdog. Perhaps I can be more specific and say that this synthetized detector is based on perf. On a side note, I saw that powerpc might use a perf-based hardlockup detector if it has perf events [1]. Please let me know if my understanding is not correct. Thanks and BR, Ricardo [1]. https://elixir.bootlin.com/linux/v4.17/source/arch/powerpc/Kconfig#L218 -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
