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SubjectRe: [PATCH] x86-32: Allocate irq stacks seperate from percpu area

* Linus Torvalds <> wrote:

> On Tue, Oct 26, 2010 at 10:43 PM, Brian Gerst <> wrote:
> > The percpu allocator cannot handle alignments larger than one page.
> > Allocate the irq stacks seperately, and only keep the pointers as
> > percpu data.
> Ok, so I definitely want this (although it sounds like it would be good to do the
> allocation numa-aware - possibly a separate issue).
> However, I also want to remove all the crap that got added for the multi-page
> percpu support. It was ugly, and apparently never really worked. All the
> PER_CPU_MULTIPAGE_ALIGNED crud just needs to go away.
> Ingo, can you take care of this all, or should I just take the patch and remove
> the multipage stuff manually?

Sure, i'm queuing up Brian's patch (initially wanted to wait for the NUMA-aware
version) and will remove all the multipage pcpu bits - will send you a pull request
later today, after a bit of testing.



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