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SubjectRe: 2.6.21-rc5: swsusp: Not enough free memory
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Hi.

On Fri, 2007-04-13 at 14:00 +0200, Rafael J. Wysocki wrote:
> >
> > Shrinking memory... Pages needed: 128103 normal, 0 highmem
> > Pages needed: 125226 normal, 0 highmem
> > Pages needed: -5757 normal, 0 highmem
> > Pages needed: -5757 normal, 0 highmem
> > Pages needed: -5757 normal, 0 highmem
> > Pages needed: -5757
> > Pages needed: 127953 normal, 0 highmem
> > Pages needed: 125076 normal, 0 highmem
> > Pages needed: -6043 normal, 0 highmem
> > Pages needed: -6043 normal, 0 highmem
> > Pages needed: -6043 normal, 0 highmem
> > Pages needed: -6043
> > done (200 pages freed)
> > Freed 800 kbytes in 0.16 seconds (5.00 MB/s)
> > Suspending console(s)
> > ...
> > CPU1 is down
> > swsusp: critical section:
> > swsusp: Need to copy 131358 pages
> > swsusp: Normal pages needed: 131358
> > swsusp: Normal pages needed: 131358 + 1024 + 22, available pages: 130607
>
> Well, it looks like someone allocated about 6000 pages after we had freed
> enough memory for suspending.

We have a tunable allowance in Suspend2 for this, because fglrx
allocates a lot of pages in its suspend routine if DRI is enabled. I
think some other drivers do too, but fglrx is the main one I know.

Nigel

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