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authorDimitri Sivanich <sivanich@sgi.com>2010-03-11 14:08:56 -0800
committerThomas Gleixner <tglx@linutronix.de>2010-03-24 14:10:03 +0100
commit92d6b71ab906be706f3679353b30a8d2c3831144 (patch)
tree2b82cc7f065f947f4a6430e0de3bc63a4870907d /Documentation/filesystems
parent220bf991b0366cc50a94feede3d7341fa5710ee4 (diff)
downloadlinux-92d6b71ab906be706f3679353b30a8d2c3831144.tar.bz2
genirq: Expose irq_desc->node in proc/irq
Expose irq_desc->node as /proc/irq/*/node. This file provides device hardware locality information for apps desiring to include hardware locality in irq mapping decisions. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/proc.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index a4f30faa4f1f..6507d2ae5236 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -566,6 +566,10 @@ The default_smp_affinity mask applies to all non-active IRQs, which are the
IRQs which have not yet been allocated/activated, and hence which lack a
/proc/irq/[0-9]* directory.
+The node file on an SMP system shows the node to which the device using the IRQ
+reports itself as being attached. This hardware locality information does not
+include information about any possible driver locality preference.
+
prof_cpu_mask specifies which CPUs are to be profiled by the system wide
profiler. Default value is ffffffff (all cpus).