Messages in this thread | | | From | "Stephen C. Tweedie" <> | Date | Fri, 23 Apr 1999 15:07:31 +0100 (BST) | Subject | Re: RFC: Early freeing of page tables - 2.2.5 patch |
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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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