linux-kernel - Re: Question with maxcpus= parameter.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 8 Nov 2015 22:12:03 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Zhenzhong Duan <zhenzhong.duan@...cle.com>
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Ashok Raj <ashok.raj@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Feng Jin <joe.jin@...cle.com>
Subject: Re: Question with maxcpus= parameter.

On Sun, Nov 8, 2015 at 9:47 PM, Zhenzhong Duan
<zhenzhong.duan@...cle.com> wrote:
> Tried nr_cpus=4, works.
>

nr_cpus and maxcpus are different.

maxcpus=4 means kernel will only bring up 4 cpus, but other cpus still
can be brought up online.
if there are more cpu are there according acpi MADT.

nr_cpus=4 that means 4 is hard limit, just like you compiled kernel
with CONFIG_NR_CPUS=4.

Yinghai
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/