Re: [RFC 0/2] Delay initializing of large sections of memory

From: Yinghai Lu
Date: Fri Jun 21 2013 - 16:28:17 EST

On Fri, Jun 21, 2013 at 12:19 PM, Nathan Zimmer <nzimmer@xxxxxxx> wrote:
> On 06/21/2013 02:10 PM, Yinghai Lu wrote:
>> in this way we can keep all numa etc on the place when online ram, cpu,
>> pci...
>> For example if we have 32 sockets system, most time for boot is with
>> *BIOS*
>> instead of OS. In those kind of system boot is like this way:
>> only first two sockets get booted from bios to OS.
>> later use hot add every other two sockets.
>> that will also make BIOS simpler, and it need to support hot-add for
>> services purpose anyway.
> Yes the hot add path was one option we looked at and it did shorten boot
> times but the goal I had here is to get from power on to having the full
> machine available as quick as possible. Several clients need significant
> portions of ram for their key workloads. So that guided my thoughts on this
> patch.

you mean boot small number sockets + hot add still take more time?
hot add ram still in serialize mode?

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