Re: [parisc-linux] struct page: page in use or not ?

[bruno_vidal@hp.com]

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    Hi
What do you mean by "swsusp" patche ? What it do....
Actually I'm looking at the kmalloc() function in order to
understand how it determine the bucket, and so to know
which pages I need to dump before I can use the page structure.
Do you think it is a good starting point, or using page
struture is really a bad option ?

    Thanks.

Matthew Wilcox wrote:

> On Wed, Mar 19, 2003 at 05:50:46PM +0100, bruno_vidal@hp.com wrote:
> >     Hi
> > I'm currently trying to reduce the dump time, and then I try to dump only
> > pages that are currently use by the system. In page structure I found a flag,
> > I was thinking a good one for this purpose:
> > atomic_t count;                 /* Usage count, see below. */
> >
> > But after taking only pages where count != 0, something was broken, I was
> > not able to look at proc structure, and several things.....
> > If a do a "full" dump I'm still able to look at what I need, so this page.count
> > is not accurate for this purpose. So does't exist a good way to know if a page
> > is in use or not ?
>
> The problem is multi-page allocs.  The `struct page' is not valid
> for those.  I'm not sure what a good way of doing this is -- have you
> looked at the swsusp patches to see how they do it?
>
> --
> "It's not Hollywood.  War is real, war is primarily not about defeat or
> victory, it is about death.  I've seen thousands and thousands of dead bodies.
> Do you think I want to have an academic debate on this subject?" -- Robert Fisk
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--
        Vidal Bruno, (770-4271)
        SSD-HA Team, HP-UX & LINUX Support
        bruno_vidal@admin.france.hp.com



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