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SubjectRe: [kerneloops] regression in 2.6.27 wrt "lock_page" and the "hwclock" program
On Sun, 12 Oct 2008 13:16:12 -0700 (PDT)
Linus Torvalds <> wrote:

> On Sun, 12 Oct 2008, Karel Zak wrote:
> >
> > Any suggestion how to nicely implement "don't schedule me out"?
> There's nothing you can do. If you take a page fault, you're done.
> Forget about any "can't schedule" or "don't enable interrupts". The
> kernel _has_ to handle the page fault, and that may involve IO and
> thus random pauses. No ifs, buts or maybe's about it.
> This patch may or may not get rid of the warning, at least. It won't
> fix hwclock, but that's apparently unfixable from the kernel - the
> thing is just plain buggy.

it almost sounds like it's trying to do something that ... really the
kernel should be doing.

Karel: Can you describe what it WANTS to do so we can see if we can
just extend the linux kernel to do that the right way?

Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,

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