Re: anon_vma RFC2

William Lee Irwin III
2004-03-12T13:40:36Z

On Fri, Mar 12, 2004 at 02:24:36PM +0100, Andrea Arcangeli wrote:
> did you try specweb with apache? that's super heavy mremap as far as I
> know (and it maybe using anon memory, and if not I certainly cannot
> exclude other apps are using mremap on significant amounts of anymous
> ram). To a point that the kmap_lock for the persistent kmaps I used
> originally in mremap (at least it has never been racy) was a showstopper
> bottleneck spending most of system time there (profiling was horrible in
> the kmap_lock) and I had to fixup the 2.6 way with the per-cpu atomic
> kmaps to avoid being an order of magnitude slower than in the small
> boxes w/o highmem.

No. I have never had access to systems set up for specweb.

-- wli