Re: [PATCH 1/6] mm: tracking shared dirty pages

[Andrew Morton]

On Wed, 21 Jun 2006 23:07:37 -0700 (PDT)
Christoph Lameter <clameter@xxxxxxx> wrote:

> On Wed, 21 Jun 2006, Andrew Morton wrote:
> 
> > Performance testing is critical here.  I think some was done, but I don't
> > reall what tests were performed, nor do I remember the results.  Without such
> > info it's not possible to make a go/no-go decision.
> 
> Tests did show that there was no performance regression for the usual 
> tests. That is to be expected since the patch should only modify the 
> behavior of shared writable mapping. The use of those is rare in typical 
> benchmarks.

Of course.  In this case one should prepare an artificial microbenchmark so
we can understand the worst case.
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