Re: VM fixes [2/4]
From: Nick Piggin (nickpiggin_at_yahoo.com.au)
Date: 12/30/04
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- In reply to: Andrea Arcangeli: "VM fixes [2/4]"
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Date: Fri, 31 Dec 2004 08:12:42 +1100 To: Andrea Arcangeli <andrea@suse.de>
Andrea Arcangeli wrote:
> This is the forward port to 2.6 of the lowmem_reserved algorithm I
> invented in 2.4.1*, merged in 2.4.2x already and needed to fix workloads
> like google (especially without swap) on x86 with >1G of ram, but it's
> needed in all sort of workloads with lots of ram on x86, it's also
> needed on x86-64 for dma allocations. This brings 2.6 in sync with
> latest 2.4.2x.
>
This looks OK to me. It really simplifies the code there a lot too.
The only questions I have are: should it be on by default? I don't think
we ever reached an agreement. I'd say yes, after a run in -mm because it
does potentially fix corner cases where lower zones get filled with un-
freeable memory which could have been satisfied with higher zones.
And second, any chance you could you port it to the mm patches already in
-mm? Won't be a big job, just some clashes in __alloc_pages...
mm-keep-count-of-free-areas.patch
mm-higher-order-watermarks.patch
mm-higher-order-watermarks-fix.patch
mm-teach-kswapd-about-higher-order-areas.patch
Thanks,
Nick
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- Previous message: Jason Gaston: "[PATCH] SATA support for Intel ICH7 - 2.6.10 - repost"
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