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| author | Thomas Karlsson <thomas.karlsson@paneda.se> | 2020-12-02 21:49:58 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-12-03 19:21:29 +0300 |
| commit | d4bff72c8401e6f56194ecf455db70ebc22929e2 (patch) | |
| tree | 6fd44a6c6afc0784de37e344ea1f138134927b96 /include/linux/if_macvlan.h | |
| parent | cec85994c6b4fa6beb5de61dcd03e23001b9deb5 (diff) | |
| download | linux-d4bff72c8401e6f56194ecf455db70ebc22929e2.tar.xz | |
macvlan: Support for high multicast packet rate
Background:
Broadcast and multicast packages are enqueued for later processing.
This queue was previously hardcoded to 1000.
This proved insufficient for handling very high packet rates.
This resulted in packet drops for multicast.
While at the same time unicast worked fine.
The change:
This patch make the queue length adjustable to accommodate
for environments with very high multicast packet rate.
But still keeps the default value of 1000 unless specified.
The queue length is specified as a request per macvlan
using the IFLA_MACVLAN_BC_QUEUE_LEN parameter.
The actual used queue length will then be the maximum of
any macvlan connected to the same port. The actual used
queue length for the port can be retrieved (read only)
by the IFLA_MACVLAN_BC_QUEUE_LEN_USED parameter for verification.
This will be followed up by a patch to iproute2
in order to adjust the parameter from userspace.
Signed-off-by: Thomas Karlsson <thomas.karlsson@paneda.se>
Link: https://lore.kernel.org/r/dd4673b2-7eab-edda-6815-85c67ce87f63@paneda.se
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/if_macvlan.h')
| -rw-r--r-- | include/linux/if_macvlan.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/if_macvlan.h b/include/linux/if_macvlan.h index a367ead4bf4b..96556c64c95d 100644 --- a/include/linux/if_macvlan.h +++ b/include/linux/if_macvlan.h @@ -30,6 +30,7 @@ struct macvlan_dev { enum macvlan_mode mode; u16 flags; unsigned int macaddr_count; + u32 bc_queue_len_req; #ifdef CONFIG_NET_POLL_CONTROLLER struct netpoll *netpoll; #endif |