Re: Locking comment on shrink_caches()

Andrew Morton (akpm@zip.com.au)
Tue, 25 Sep 2001 14:05:04 -0700

"David S. Miller" wrote:
>
> From: Rik van Riel <riel@conectiva.com.br>
> Date: Tue, 25 Sep 2001 17:24:21 -0300 (BRST)
>
> Or were you measuring loads which are mostly read-only ?
>
> When Kanoj Sarcar was back at SGI testing 32 processor Origin
> MIPS systems, pagecache_lock was at the top.

But when I asked kumon to test it on his 8-way Xeon,
page_cache_lock contention proved to be insignificant.

Seems to only be a NUMA thing.
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