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authorCoco Li <lixiaoyan@google.com>2022-01-05 02:48:38 -0800
committerDavid S. Miller <davem@davemloft.net>2022-01-06 12:27:05 +0000
commiteac1b93c14d645ef147b049ace0d5230df755548 (patch)
tree1cbed37768a8189a8ff3cd4c8ca7e542e3595aca /tools
parent007747a984ea5e895b7d8b056b24ebf431e1e71d (diff)
downloadlinux-eac1b93c14d645ef147b049ace0d5230df755548.tar.bz2
gro: add ability to control gro max packet size
Eric Dumazet suggested to allow users to modify max GRO packet size. We have seen GRO being disabled by users of appliances (such as wifi access points) because of claimed bufferbloat issues, or some work arounds in sch_cake, to split GRO/GSO packets. Instead of disabling GRO completely, one can chose to limit the maximum packet size of GRO packets, depending on their latency constraints. This patch adds a per device gro_max_size attribute that can be changed with ip link command. ip link set dev eth0 gro_max_size 16000 Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Coco Li <lixiaoyan@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools')
-rw-r--r--tools/include/uapi/linux/if_link.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/if_link.h b/tools/include/uapi/linux/if_link.h
index 4ac53b30b6dc..6218f93f5c1a 100644
--- a/tools/include/uapi/linux/if_link.h
+++ b/tools/include/uapi/linux/if_link.h
@@ -347,6 +347,7 @@ enum {
*/
IFLA_PARENT_DEV_NAME,
IFLA_PARENT_DEV_BUS_NAME,
+ IFLA_GRO_MAX_SIZE,
__IFLA_MAX
};