Re: [PATCH] bootmem speedup from the IA64 tree

[William Lee Irwin III <wli@holomorphy.com>]

On Thu, Apr 10, 2003 at 01:43:34PM -0700, Andrew Morton wrote:
> Agreed.  I've updated the patch thusly.
> Bootmem igornamus says:
> Do we have a problem with using an `unsigned long' byte address in there on
> ia32 PAE?  Or are we guaranteed that this will only ever be used in the lower
> 4G of physical memory?

It's only ever used for lowmem on ia32, which is even below 1GB.


On Thu, Apr 10, 2003 at 01:43:34PM -0700, Andrew Morton wrote:
> Does the last_success cache ever need to be updated if someone frees some
> previously-allocated memory?

Setting preferred only puts a finger on where to begin a search. The
search (and validity checking) are still carried out as usual. It could
be suboptimal to set it to somewhere that's not as good as possible
after a free, but it's only advice as to where to start a search and so
doesn't affect correctness so long as it's in-bounds.

I'm just going to grab a barfbag and run now.


-- wli
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