linux-kernel - Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks

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Date:	Mon, 28 Jul 2008 14:23:54 -0700
From:	Eric B Munson <ebmunson@...ibm.com>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, libhugetlbfs-devel@...ts.sourceforge.net
Subject: Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks

On Mon, 28 Jul 2008, Dave Hansen wrote:

> On Mon, 2008-07-28 at 12:17 -0700, Eric Munson wrote:
> > 
> > This patch stack introduces a personality flag that indicates the
> > kernel
> > should setup the stack as a hugetlbfs-backed region. A userspace
> > utility
> > may set this flag then exec a process whose stack is to be backed by
> > hugetlb pages.
> 
> I didn't see it mentioned here, but these stacks are fixed-size, right?
> They can't actually grow and are fixed in size at exec() time, right?
> 
> -- Dave

The stack VMA is a fixed size but the pages will be faulted in as needed.

-- 
Eric B Munson
IBM Linux Technology Center
ebmunson@...ibm.com


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