From: ebiederm@xmission.com (Eric W. Biederman)
To: "H. Peter Anvin" <hpa@zytor.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 20:13:50 -0800 [thread overview]
Message-ID: <m1ei91usg1.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <4D1A4469.2060000@zytor.com> (H. Peter Anvin's message of "Tue, 28 Dec 2010 12:11:21 -0800")
"H. Peter Anvin" <hpa@zytor.com> writes:
> 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.
What motivates your trampoline rewrite?
Eric
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next prev parent reply other threads:[~2010-12-29 4:14 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
2010-12-29 4:13 ` Eric W. Biederman [this message]
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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