Messages in this thread | ![/](/images/icornerl.gif) | | Date | Sat, 27 Nov 2010 07:39:56 +0800 | Subject | Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX protection for kernel data) | From | Lin Ming <> |
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On Sat, Nov 27, 2010 at 1:31 AM, mat <castet.matthieu@free.fr> wrote: > Le Tue, 23 Nov 2010 23:55:27 +0100, > mat <castet.matthieu@free.fr> a écrit : > >> Le Mon, 22 Nov 2010 17:42:47 +0100, >> Andi Kleen <andi@firstfloor.org> a écrit : >> >> > > That seems to be a S3 specific code path, that won't fix anything. >> > > Simply do: >> > > >> > > echo 0 > /sys/devices/system/cpu/cpu1/online; >> > > echo 1 > /sys/devices/system/cpu/cpu1/online; >> > > >> > > and your machine will explode.. >> > >> > The SMP startup trampoline is copied I believe >> > and only executed in real mode without page tables. >> > >> > So it's perhaps not the trampoline, but the early startup >> > code that ends up being broken. >> yes : >> acpi wakeup code and smp trampoline are copied in low memory (first >> 1MB). >> >> So they can't end up int the kernel data mapping ? >> >> So it should something else. >> >> I will try to investigate on this. >> > Unfortunately on my laptop supporting NX, suspend to ram seems broken > (even without this patch) and I got only one core, so I am unable to > test it. > > Does cpu suspend/resume is broken ? Or it is only S3 ? > > If yes, are there any interesting trace if we suspend only one core with > sysfs.
Hi,
I am on travel now, will test it when I'm back next week.
Thanks, Lin Ming
> > Thanks, > > Matthieu -- 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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