From: "H. Peter Anvin" <hpa@zytor.com>
To: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: pxeboot broken by commit "x86 setup: handle boot loaders which set up the stack incorrectly"
Date: Wed, 07 Nov 2007 09:53:46 -0800 [thread overview]
Message-ID: <4731FBAA.9020500@zytor.com> (raw)
In-Reply-To: <86802c440711070949pc09d49ar36d0b9f32a506e20@mail.gmail.com>
Yinghai Lu wrote:
>
> good to know. everyone need to update to 3.52 now...
> but i still can not understand why that mcp55 system works but the
> ck804 based doesn't on 3.10
>
The bug is that syslinux incorrectly positions the stack above the
command line (but not the stack pointer register; hence the kernel patch
exposing this bug.) So the stack plus command line end up being limited
to 512 bytes; how much stack gets used depends on the BIOS, so one
BIOS may use a lot more than another.
-hpa
next prev parent reply other threads:[~2007-11-07 17:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200711070708.lA778VtP029664@terminus.zytor.com>
2007-11-07 17:49 ` pxeboot broken by commit "x86 setup: handle boot loaders which set up the stack incorrectly" Yinghai Lu
2007-11-07 17:53 ` H. Peter Anvin [this message]
2007-11-07 0:18 Yinghai Lu
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