Re: [PATCH 00/25] Vm Pageout Scalability Improvements (V8) -continued
From: Andrew Morton
Date: Thu May 29 2008 - 16:18:21 EST
On Thu, 29 May 2008 15:50:30 -0400
Lee Schermerhorn <lee.schermerhorn@xxxxxx> wrote:
>
> The patches to follow are a continuation of the V8 "VM pageout scalability
> improvements" series that Rik van Riel posted to LKML on 23May08. These
> patches apply atop Rik's series with the following overlap:
>
> Patches 13 through 16 replace the corresponding patches in Rik's posting.
>
> Patch 13, the noreclaim lru infrastructure, now includes Kosaki Motohiro's
> memcontrol enhancements to track nonreclaimable pages.
>
> Patches 14 and 15 are largely unchanged, except for refresh. Includes
> some minor statistics formatting cleanup.
>
> Patch 16 includes a fix for an potential [unobserved] race condition during
> SHM_UNLOCK.
>
<head spins a bit>
>
> Additional patches in this series:
>
> Patches 17 through 20 keep mlocked pages off the normal [in]active LRU
> lists using the noreclaim lru infrastructure. These patches represent
> a fairly significant rework of an RFC patch originally posted by Nick Piggin.
>
> Patches 21 and 22 are optional, but recommended, enhancements to the overall
> noreclaim series.
>
> Patches 23 and 24 are optional enhancements useful during debug and testing.
>
> Patch 25 is a rather verbose document describing the noreclaim lru
> infrastructure and the use thereof to keep ramfs, SHM_LOCKED and mlocked
> pages off the normal LRU lists.
>
> ---
>
> The entire stack, including Rik's split lru patches, are holding up very
> well under stress loads. E.g., ran for over 90+ hours over the weekend on
> both x86_64 [32GB, 8core] and ia64 [32GB, 16cpu] platforms without error
> over last weekend.
>
> I think these are ready for a spin in -mm atop Rik's patches.
I was >this< close to getting onto Rik's patches (honest) but a few
other people have been kicking the tyres and seem to have caused some
punctures so I'm expecting V9?
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