Re: a plea for mincore()/madvise()

[Chuck Lever <cel@monkey.org>]

On Fri, 10 Mar 2000, Linus Torvalds wrote:
> On Fri, 10 Mar 2000, Chuck Lever wrote:
> > ja, that's exactly what my patch does.  i'm still not sure what you don't
> > like about it.  i'm happy to make it do anything you want, but it sounds
> > like we are in agreement here.
> 
> Ok. I may not have seen (or noticed) your patch, I've seen earlier patches
> that didn't do that.
> 
> > my only sticking point is that i'm not sure what community consensus there
> > is about MADV_DONTNEED.  i'd like to create a patch that implements
> > everything except MADV_DONTNEED, then maybe we should have more discussion
> > about exactly how that will work and add it later.
> 
> I'd like MADV_DONTNEED to just clear the page tables. If it was a private
> mapping, all the modifications get lost. If it was a shared mapping,
> modifications since the last msync() may or may not get lost. 

i'll create a patch against 2.3.51-pre3 for madvise() and post it on the
mm list before sunday.  then we can argue about something we've both seen
:)

let me think some more about DONTNEED.  at the face of it, i agree with
your suggestion, but i may just exclude it from the patch until there is
more discussion here.

	- Chuck Lever
--
corporate:	<chuckl@netscape.com>
personal:	<chucklever@netscape.net> or <cel@monkey.org>

The Linux Scalability project:
	http://www.citi.umich.edu/projects/linux-scalability/

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