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Open Source and information security mailing list archives
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Date: Fri, 13 Feb 2015 22:58:54 +0000 From: Russell King - ARM Linux <linux@....linux.org.uk> To: Magnus Damm <magnus.damm@...il.com> Cc: Stephen Boyd <sboyd@...eaurora.org>, Simon Horman <horms@...ge.net.au>, linux-kernel <linux-kernel@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, Mark Rutland <mark.rutland@....com>, Nicolas Pitre <nico@...aro.org>, Dave Martin <Dave.Martin@....com>, SH-Linux <linux-sh@...r.kernel.org> Subject: Re: [PATCH v2] ARM: smp: Only expose /sys/.../cpuX/online if hotpluggable On Fri, Feb 13, 2015 at 08:54:22PM +0000, Magnus Damm wrote: > Thanks for your efforts. Can you please tell me where that limitation > is located? I'm quite sure I've brought CPU cores up and down > including CPU0, but maybe something is missing? If you don't provide a cpu_disable function, by default only the non-boot (iow, non-CPU0) CPUs can be hotplugged. If you provide a cpu_disable function, it can instruct the system that fewer or more CPUs can be hotplugged, including the boot CPU. The system will then restrict you to a minimum of any one CPU online. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- 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/
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