Re: [PATCH/RFC 0/8] Mapped File Policy Overview

[Christoph Lameter <clameter@sgi.com>]

On Fri, 25 May 2007, Lee Schermerhorn wrote:

> It's easy to fix.  The shared policy support is already there.  We just
> need to generalize it for regular files.  In the process,
> *page_cache_alloc() obeys "file policy", which will allow additional
> features such as you mentioned:  global page cache policy as the default
> "file policy".

A page cache policy would not need to be file based. It would be enough 
to have a global one or one per cpuset. And it would not suffer from the 
vanishing act of the inodes.

> By the way, I think we need the numa_maps fixes in any case because the
> current implementation lies about shmem segments if you look at any task
> that didn't install [all of] the policy on the segment, unless it
> happens to be a child of the task that did install the policy and that
> child was forked after the mbind() calls.  I really dislike all of those
> "ifs" and "unlesses"--I found it humorous in the George Carlin routine,
> but not in user/programming interface design.

Could you separate out a patch that fixes these issues?

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