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SubjectRe: [RFC][PATCH 0/6] Another go at speculative page faults
On Thu, Oct 23, 2014 at 06:40:05PM +0800, Lai Jiangshan wrote:
> On 10/22/2014 01:56 AM, Peter Zijlstra wrote:
> > On Tue, Oct 21, 2014 at 08:09:48PM +0300, Kirill A. Shutemov wrote:
> >> It would be interesting to see if the patchset affects non-condended case.
> >> Like a one-threaded workload.
> >
> > It does, and not in a good way, I'll have to look at that... :/
> Maybe it is blamed to find_vma_srcu() that it doesn't take the advantage of
> the vmacache_find() and cause more cache-misses.

Its what I thought initially, I tried doing perf record with and
without, but then I ran into perf diff not quite working for me and I've
yet to find time to kick that thing into shape.

> Is it hard to use the vmacache in the find_vma_srcu()?

I've not had time to look at it.

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