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SubjectRe: RFC: Early freeing of page tables - 2.2.5 patch
Hi,

On Wed, 21 Apr 1999 18:34:37 +0200 (CEST), Jakub Jelinek
<jj@sunsite.ms.mff.cuni.cz> said:

> As I hope 2.3 time is getting close, I've started to code a clearly 2.3
> thing: instead of the free_pgtable hack free always page tables as you go.
> As we have the page table cache, those page tables will be ressurected from
> there if needed, so usually no page clearing nor allocation/freeing will
> actually happen.

...

> What do you think about this?

Looks sensible. It's far cheaper to detect whether a page
table/directory is empty by looking at the surrounding vmas than by
examining the directory tree.

> The patch is against 2.2.5, I'll update it soon to 2.2.6. It won't apply
> cleanly to 2.2.6.

OK, I'll give it a spin on SMP Intel if you want once you have a 2.2.6
version.

--Stephen

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