Re: [patch 10/10] mm: workingset: keep shadow entries in check

From: Peter Zijlstra
Date: Mon Jun 03 2013 - 04:22:56 EST

On Thu, May 30, 2013 at 02:04:06PM -0400, Johannes Weiner wrote:
> 2. a list of files that contain shadow entries is maintained. If the
> global number of shadows exceeds a certain threshold, a shrinker is
> activated that reclaims old entries from the mappings. This is
> heavy-handed but it should not be a common case and is only there
> to protect from accidentally/maliciously induced OOM kills.

Grrr.. another global files list. We've been trying rather hard to get
rid of the first one :/

I see why you want it but ugh.

I have similar worries for your global time counter, large machines
might thrash on that one cacheline.

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