summaryrefslogtreecommitdiff
path: root/net/Kconfig
diff options
context:
space:
mode:
authorJoe Damato <jdamato@fastly.com>2022-03-02 10:55:47 +0300
committerDavid S. Miller <davem@davemloft.net>2022-03-03 12:55:28 +0300
commit8610037e8106b48c79cfe0afb92b2b2466e51c3d (patch)
tree32f1b4cdbf620845dcf8f6af2a37319bc0b1f311 /net/Kconfig
parent42f0c1934c7cb3e94c2fe8f5771245fa5631d0e7 (diff)
downloadlinux-8610037e8106b48c79cfe0afb92b2b2466e51c3d.tar.xz
page_pool: Add allocation stats
Add per-pool statistics counters for the allocation path of a page pool. These stats are incremented in softirq context, so no locking or per-cpu variables are needed. This code is disabled by default and a kernel config option is provided for users who wish to enable them. The statistics added are: - fast: successful fast path allocations - slow: slow path order-0 allocations - slow_high_order: slow path high order allocations - empty: ptr ring is empty, so a slow path allocation was forced. - refill: an allocation which triggered a refill of the cache - waive: pages obtained from the ptr ring that cannot be added to the cache due to a NUMA mismatch. Signed-off-by: Joe Damato <jdamato@fastly.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/Kconfig')
-rw-r--r--net/Kconfig13
1 files changed, 13 insertions, 0 deletions
diff --git a/net/Kconfig b/net/Kconfig
index 8a1f9d0287de..6b78f695caa6 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -434,6 +434,19 @@ config NET_DEVLINK
config PAGE_POOL
bool
+config PAGE_POOL_STATS
+ default n
+ bool "Page pool stats"
+ depends on PAGE_POOL
+ help
+ Enable page pool statistics to track page allocation and recycling
+ in page pools. This option incurs additional CPU cost in allocation
+ and recycle paths and additional memory cost to store the statistics.
+ These statistics are only available if this option is enabled and if
+ the driver using the page pool supports exporting this data.
+
+ If unsure, say N.
+
config FAILOVER
tristate "Generic failover module"
help