Re: [PATCH v2 1/5] uaccess: add pagefault_count to thread_info

From: David Hildenbrand
Date: Mon Dec 15 2014 - 11:42:44 EST

> On Wed, Dec 10, 2014 at 10:23 PM, David Hildenbrand
> <dahi@xxxxxxxxxxxxxxxxxx> wrote:
> > This patch adds the pagefault_count to the thread_info of all
> > architectures. It will be used to count the pagefault_disable() levels
> > on a per-thread basis.
> >
> > We are not reusing the preempt_count as this is per cpu on x86 and we want to
> > demangle pagefault_disable() from preemption in the future.
> >
> > The new counter is added directly below the preempt_count, except for archs
> > relying on a manual calculation of asm offsets - to minimize the changes.
> >
> Hi David
> Is this patchset targeted for 3.19? If yes, then we need this for
> arch/nios2 as well (new arch in 3.19).


Peter just showed my that there is some work ongoing on that
pagefault_disable() topic. So I am not sure if the arch-specific part of this
series is still relevant.

But thanks for the info!


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at