Re: [patch 1/3] slob: rework freelist handling

Matt Mackall
2007-05-24T17:44:07Z

On Thu, May 24, 2007 at 10:27:54AM -0700, Christoph Lameter wrote:
> On Thu, 24 May 2007, Matt Mackall wrote:
>
> > That's C) above. But you haven't answered the real question: why
> > bother? RECLAIMABLE is a bogus number and the VM treats it as such. We
> > can make no judgment on how much memory we can actually reclaim from
> > looking at reclaimable - it might very easily all be pinned.
>
> The memory was allocated from a slab that has SLAB_ACCOUNT_RECLAIM set. It
> is the responsibility of the slab allocator to properly account for these.

You keep asserting this, but the fact is if I ripped out all the
SLAB_ACCOUNT_RECLAIM logic, the kernel would be unaffected.

Because RECLAIM IS JUST A HINT. And not a very good one.

--
Mathematics is the supreme nostalgia of our time.