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Message-ID: <20091116211719.GE21242@ldl.fc.hp.com> Date: Mon, 16 Nov 2009 14:17:19 -0700 From: Alex Chiang <achiang@...com> To: gregkh@...e.de Cc: linux-kernel <linux-kernel@...r.kernel.org> Subject: [PATCH] Documentation: ABI: /sys/devices/system/cpu/cpu#/online Add documentation for CPU hotplug interface. Signed-off-by: Alex Chiang <achiang@...com> --- I forgot to send this patch in the last round of documentation updates, and wanted to send it before it gets misplaced. ;) --- diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index a703b9e..5aace16 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -62,7 +62,6 @@ Description: CPU topology files that describe kernel limits related to See Documentation/cputopology.txt for more information. - What: /sys/devices/system/cpu/cpu#/node Date: October 2009 Contact: Linux memory management mailing list <linux-mm@...ck.org> @@ -77,6 +76,24 @@ Description: Discover NUMA node a CPU belongs to /sys/devices/system/cpu/cpu42/node2 -> ../../node/node2 +What: /sys/devices/system/cpu/cpu#/online +Date: January 2006 +Contact: Linux kernel mailing list <linux-kernel@...r.kernel.org> +Description: Discover and change the online state of a CPU. + + To discover the state: + + cat /sys/devices/system/cpu/cpu#/online + + A value of 0 indicates the CPU is offline. A value of 1 + indicates it is online. To change the state, echo the + desired new state into the file: + + echo [0|1] > /sys/devices/system/cpu/$cpu/online + + For more information, please read Documentation/cpu-hotplug.txt + + What: /sys/devices/system/cpu/cpu#/topology/core_id /sys/devices/system/cpu/cpu#/topology/core_siblings /sys/devices/system/cpu/cpu#/topology/core_siblings_list -- 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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