Re: Page fault scalability patch V18: Overview

Darren Williams
2005-03-06T21:49:02Z

Hi Christoph

On Fri, 04 Mar 2005, Christoph Lameter wrote:

> Make sure that scrubd_stop on startup is set to 2 and no zero in
> mm/scrubd.c. The current patch on oss.sgi.com may have that set to zero.
>
unsigned int sysctl_scrub_stop = 2; /* Mininum order of page to zero */

This is the assignment when page zero fails.

Darren

> On Fri, 4 Mar 2005, Darren Williams wrote:
>
> > Hi Darren
> >
> > On Fri, 04 Mar 2005, Darren Williams wrote:
> >
> > > Hi Christoph
> > >
> > > On Tue, 01 Mar 2005, Christoph Lameter wrote:
> > >
> > > > Is there any chance that this patchset could go into mm now? This has been
> > > > discussed since last August....
> > > >
> > > > Changelog:
> > > >
> > > > V17->V18 Rediff against 2.6.11-rc5-bk4
> > >
> > > Just applied this patch against 2.6.11, however with the patch applied
> > > and all the aditional config options not set, the kernel hangs at
> > > Freeing unused kernel memory: 240kB freed
> > > FYI:
> > >
> > > boot atomic prezero
> > > OK on on
> > > fail off on
> > > fail off off
> > > OK on off
> >
> > A bit extra info on the system:
> > HP rx8620 Itanium(R) 2 16way
> >
> > >
> > > > V16->V17 Do not increment page_count in do_wp_page. Performance data
> > > > posted.
> > > > V15->V16 of this patch: Redesign to allow full backback
> > > > for architectures that do not supporting atomic operations.
> > > >
> > > > An introduction to what this patch does and a patch archive can be found on
> > > > http://oss.sgi.com/projects/page_fault_performance. The archive also has the
> > > > result of various performance tests (LMBench, Microbenchmark and
> > > > kernel compiles).
> > > >
> > > > The basic approach in this patchset is the same as used in SGI's 2.4.X
> > > > based kernels which have been in production use in ProPack 3 for a long time.
> > > >
> > > > The patchset is composed of 4 patches (and was tested against 2.6.11-rc5-bk4):
> > > >
> > > [SNIP]
> > >
> > > > -
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> > > --------------------------------------------------
> > > Darren Williams <dsw AT gelato.unsw.edu.au>
> > > Gelato@UNSW <www.gelato.unsw.edu.au>
> > > --------------------------------------------------
> > > -
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> > --------------------------------------------------
> > Darren Williams <dsw AT gelato.unsw.edu.au>
> > Gelato@UNSW <www.gelato.unsw.edu.au>
> > --------------------------------------------------
> >
> -
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Darren Williams <dsw AT gelato.unsw.edu.au>
Gelato@UNSW <www.gelato.unsw.edu.au>
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