virtio-net: fill only rx queues which are being used
authorSasha Levin <sasha.levin@oracle.com>
Mon, 29 Apr 2013 02:30:08 +0000 (12:00 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Mon, 29 Apr 2013 03:17:05 +0000 (12:47 +0930)
commit55257d72bd1c51f25106350f4983ec19f62ed1fa
tree5a8017d9fbebfe3f225a77bc2aabae2d4a6f859d
parent6b39271746de131366a14bcf04f5740cdc4abdef
virtio-net: fill only rx queues which are being used

Due to MQ support we may allocate a whole bunch of rx queues but
never use them. With this patch we'll safe the space used by
the receive buffers until they are actually in use:

sh-4.2# free -h
             total       used       free     shared    buffers     cached
Mem:          490M        35M       455M         0B         0B       4.1M
-/+ buffers/cache:        31M       459M
Swap:           0B         0B         0B
sh-4.2# ethtool -L eth0 combined 8
sh-4.2# free -h
             total       used       free     shared    buffers     cached
Mem:          490M       162M       327M         0B         0B       4.1M
-/+ buffers/cache:       158M       331M
Swap:           0B         0B         0B

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
drivers/net/virtio_net.c