linux-kernel - Re: [i386] Use page allocator to allocate threadinfo structure

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Message-ID: <Pine.LNX.4.64.0704051114100.9800@schroedinger.engr.sgi.com>
Date:	Thu, 5 Apr 2007 11:15:22 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	William Lee Irwin III <wli@...omorphy.com>
cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [i386] Use page allocator to allocate threadinfo structure

On Thu, 5 Apr 2007, William Lee Irwin III wrote:

> On Wed, Apr 04, 2007 at 05:40:31PM -0700, Christoph Lameter wrote:
> > Replace the calls to kmalloc with calls into the page allocator.
> > An alternate solution may be to create a custom slab cache where the 
> > alignment is set to PAGE_SIZE. That would allow slub debugging to be 
> > applied to the threadinfo structure.
> > Signed-off-by: Christoph Lameter <clameter@....com>
> 
> This was originally made a slab allocation as a preparatory cleanup
> for things that were never merged, and are never likely to be. One
> might as well revert it, though it does make stack space usage
> slightly more difficult to account for.

No other platform does account for kernel stack space though. And you got 
two pages per process. Pretty straightforward.
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