Re: Locking comment on shrink_caches()

From: Dipankar Sarma (
Date: Wed Sep 26 2001 - 00:04:24 EST

In article <> David S. Miller wrote:
> From: Rik van Riel <>
> 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.

John Hawkes from SGI had published some AIM7 numbers that showed
pagecache_lock to be a bottleneck above 4 processors. At 32 processors,
half the CPU cycles were spent on waiting for pagecache_lock. The
thread is at -


Dipankar Sarma  <> Project:
Linux Technology Center, IBM Software Lab, Bangalore, India.
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