Messages in this thread | | | From | Andrew Lutomirski <> | Date | Wed, 3 Aug 2011 23:18:32 -0400 | Subject | Re: [PATCH 2/2] x86: Enable monitor/mwait on Intel if BIOS hasn't already |
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On Wed, Aug 3, 2011 at 3:17 PM, Len Brown <lenb@kernel.org> wrote: >> >> What machine has this BIOS bug, and are you running >> >> the latest version of the BIOS? >> > >> > Intel DQ67SW, version SWQ6710H.86A.0051.2011.0413.1154. This is not >> > quite up-to-date -- I'll test a newer BIOS. >> >> SWQ6710H.86A.0053.2011.0615.1535 has the same problem. It fixed ASPM, though :) >> >> Should I redo the patch with a printk to warn about the firmware bug? > > I would hope that a patch that _only_ prints [Firmware bug] > should be enough. This isn't the kind of workaround > that we should really have to carry in the kernel. > > This is still a very new platform, and my guess is that > they are actively updating the BIOS as we speak. > I'll see if I can figure out who to talk to > in order to make sure of that:-)
I can add a strange data point: with TXT enabled in BIOS, fast strings are disabled (on all CPUs, I think) and monitor/mwait is disabled on the boot CPU. With TXT disabled, both features are enabled.
I'll see if my laptop does the same thing.
--Andy -- 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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