From: shenkai
Date: Tue, 15 Dec 2020 01:58:06 +
Subject: [PATCH] use x86 cpu park to speedup smp_init in kexec situation
In kexec reboot on x86 machine, APs will be halted and then waked up
by the apic INIT and SIPI interrupt. Here we can let APs spin instead
of being halted and boot APs by
在 2020/12/16 5:20, Thomas Gleixner 写道:
On Tue, Dec 15 2020 at 08:31, Andy Lutomirski wrote:
On Tue, Dec 15, 2020 at 6:46 AM shenkai (D) wrote:
From: shenkai
Date: Tue, 15 Dec 2020 01:58:06 +
Subject: [PATCH] use x86 cpu park to speedup smp_init in kexec situation
In kexec reboot on x86
在 2020/12/16 18:12, Thomas Gleixner 写道:
Kai,
On Wed, Dec 16 2020 at 16:45, shenkai wrote:
在 2020/12/16 5:20, Thomas Gleixner 写道:
Thanks for your and Andy's precious comments. I would like to take a try on
reconstructing this patch to make it more decent and generic.
It would be
在 2020/12/16 23:31, Thomas Gleixner 写道:
OTOH, the advantage of INIT/SIPI is that the AP comes up in a well known
state.
We can set APs to a known state explicitly like BSP will do in kexec
case (what we also tried
to do in the patch). Maybe it is not a big problem?
Best regards
Kai
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