Subject: Re: [PATCH 03/33] mm: slub: add knowledge of reserve pages

From: Peter Zijlstra <[email-masked]>
Date: Wed, 31 Oct 2007 14:08:43 +0100

On Wed, 2007-10-31 at 13:54 +0100, Peter Zijlstra wrote:
> On Wed, 2007-10-31 at 22:25 +1100, Nick Piggin wrote:

> > What I'm saying is that the slab allocator slowpath should always
> > just check watermarks against the current task. Instead of this
> > ->reserve stuff.
> 
> So what you say is to allocate a slab every time we take the slow path,
> even when we already have one?

BTW, a task that does not have reserve permissions will already attempt
to allocate a new slab - this is done to probe the current watermarks.
If this succeeds the reserve status is lifted.