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authorDimitri Sivanich <sivanich@sgi.com>2010-03-11 17:08:56 -0500
committerThomas Gleixner <tglx@linutronix.de>2010-03-24 09:10:03 -0400
commit92d6b71ab906be706f3679353b30a8d2c3831144 (patch)
tree2b82cc7f065f947f4a6430e0de3bc63a4870907d /Documentation/filesystems
parent220bf991b0366cc50a94feede3d7341fa5710ee4 (diff)
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
566IRQs which have not yet been allocated/activated, and hence which lack a 566IRQs which have not yet been allocated/activated, and hence which lack a
567/proc/irq/[0-9]* directory. 567/proc/irq/[0-9]* directory.
568 568
569The node file on an SMP system shows the node to which the device using the IRQ
570reports itself as being attached. This hardware locality information does not
571include information about any possible driver locality preference.
572
569prof_cpu_mask specifies which CPUs are to be profiled by the system wide 573prof_cpu_mask specifies which CPUs are to be profiled by the system wide
570profiler. Default value is ffffffff (all cpus). 574profiler. Default value is ffffffff (all cpus).
571 575