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Date: Fri, 30 May 2014 08:36:25 -0700
Message-ID: <CA+55aFxD=ADreuGpEEr2U1SMJ90U-cJjy7HdenUPmUkQ3GVDQA@mail.gmail.com>
Subject: Re: [RFC 2/2] x86_64: expand kernel stack to 16K
From: Linus Torvalds <torvalds@linux-foundation.org>
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To: Richard Weinberger <richard.weinberger@gmail.com>
Cc: Dave Chinner <david@fromorbit.com>, Jens Axboe <axboe@kernel.dk>, Minchan Kim <minchan@kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, linux-mm <linux-mm@kvack.org>, "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@kernel.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>, Johannes Weiner <hannes@cmpxchg.org>, Hugh Dickins <hughd@google.com>, Rusty Russell <rusty@rustcorp.com.au>, "Michael S. Tsirkin" <mst@redhat.com>, Dave Hansen <dave.hansen@intel.com>, Steven Rostedt <rostedt@goodmis.org>

On Fri, May 30, 2014 at 2:48 AM, Richard Weinberger
<richard.weinberger@gmail.com> wrote:
>
> If we raise the stack size on x86_64 to 16k, what about i386?
> Beside of the fact that most of you consider 32bits as dead and must die... ;)

x86-32 doesn't have nearly the same issue, since a large portion of
stack content tends to be pointers and longs. So it's not like it uses
half the stack, but a 32-bit environment does use a lot less stack
than a 64-bit one.

                Linus

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