Re: Break 2.4 VM in five easy steps

[ebiederm@xmission.com (Eric W. Biederman)]

Mike Galbraith <mikeg@wen-online.de> writes:

> On 7 Jun 2001, Eric W. Biederman wrote:
> 
> > Does this improve the swapoff speed or just allow other programs to
> > run at the same time?  If it is still slow under that kind of load it
> > would be interesting to know what is taking up all time.
> >
> > If it is no longer slow a patch should be made and sent to Linus.
> 
> No, it only cures the freeze.  The other appears to be the slow code
> pointed out by Andrew Morton being tickled by dead swap pages.

O.k.  I think I'm ready to nominate the dead swap pages for the big
2.4.x VM bug award.  So we are burning cpu cycles in sys_swapoff
instead of being IO bound?  Just wanting to understand this the cheap way :)

Eric
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