From: "H. Peter Anvin" <hpa@zytor.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Yinghai Lu <yinghai@kernel.org>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
Vivek Goyal <vgoyal@redhat.com>
Subject: Re: How does kdump deal with trampoline allocation?
Date: Tue, 28 Dec 2010 12:11:21 -0800 [thread overview]
Message-ID: <4D1A4469.2060000@zytor.com> (raw)
In-Reply-To: <m1lj3auyzr.fsf@fess.ebiederm.org>
On 12/27/2010 11:40 PM, Eric W. Biederman wrote:
>>
>> OK, that's straightforward. That presumably means that the low 640K is
>> marked unused in the memory map that memblock sees during early startup.
>> That fits very cleanly with the patches I'm doing.
>
> Additionally we typically start with maxcpus=1 so we don't strictly
> need the trampoline to start other cpus.
>
Well, the trampoline is optional only on 32 bits, and with my changes,
it would be unconditional.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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next prev parent reply other threads:[~2010-12-28 20:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-27 20:31 How does kdump deal with trampoline allocation? H. Peter Anvin
2010-12-28 0:06 ` Vivek Goyal
2010-12-28 0:13 ` H. Peter Anvin
2010-12-28 7:40 ` Eric W. Biederman
2010-12-28 20:11 ` H. Peter Anvin [this message]
2010-12-29 4:13 ` Eric W. Biederman
2010-12-29 6:25 ` H. Peter Anvin
2010-12-29 8:37 ` Eric W. Biederman
2011-01-03 5:01 ` Vivek Goyal
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