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| author | Ben Hutchings <bhutchings@solarflare.com> | 2011-01-19 11:03:25 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-24 14:51:56 -0800 |
| commit | c39649c331c70952700f99832b03f87e9d7f5b4b (patch) | |
| tree | 19ba9cea5102595e42bcd043aa53eb666ea834fa /lib/Kconfig | |
| parent | c2df88cbb43c25db27fbbf94e92318bdad018f3e (diff) | |
| download | linux-3.10-c39649c331c70952700f99832b03f87e9d7f5b4b.tar.gz linux-3.10-c39649c331c70952700f99832b03f87e9d7f5b4b.tar.bz2 linux-3.10-c39649c331c70952700f99832b03f87e9d7f5b4b.zip | |
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/Kconfig | 4 |
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 # |