Re: Locking comment on shrink_caches()

David S. Miller (
Tue, 25 Sep 2001 13:29:05 -0700 (PDT)

From: Marcelo Tosatti <>
Date: Tue, 25 Sep 2001 16:02:29 -0300 (BRT)

> It is known that pagecache_lock is the biggest scalability issue on
> large SMP systems, and thus the page cache locking patches Ingo and
> myself did.

Btw, is that one going into 2.5 for sure? (the per-address-space lock).

Well, there are two things happing in that patch. Per-hash chain
locks for the page cache itself, and the lock added to the address
space for that page list.

Linus has indicated it will go into 2.5.x, yes.

Franks a lot,
David S. Miller
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