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authorBen Hutchings <bhutchings@solarflare.com>2011-01-19 11:03:25 +0000
committerDavid S. Miller <davem@davemloft.net>2011-01-24 14:51:56 -0800
commitc39649c331c70952700f99832b03f87e9d7f5b4b (patch)
tree19ba9cea5102595e42bcd043aa53eb666ea834fa /lib/Kconfig
parentc2df88cbb43c25db27fbbf94e92318bdad018f3e (diff)
downloadlinux-c39649c331c70952700f99832b03f87e9d7f5b4b.tar.gz
lib: cpu_rmap: CPU affinity reverse-mapping
When initiating I/O on a multiqueue and multi-IRQ device, we may want to select a queue for which the response will be handled on the same or a nearby CPU. This requires a reverse-map of IRQ affinity. Add library functions to support a generic reverse-mapping from CPUs to objects with affinity and the specific case where the objects are IRQs. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/Kconfig')
-rw-r--r--lib/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 0ee67e08ad3..8334342e0d0 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -201,6 +201,10 @@ config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
depends on EXPERIMENTAL && BROKEN
+config CPU_RMAP
+ bool
+ depends on SMP
+
#
# Netlink attribute parsing support is select'ed if needed
#