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authorDavid Gibson <david@gibson.dropbear.id.au>2022-09-13 16:37:43 +1000
committerStefano Brivio <sbrivio@redhat.com>2022-09-13 11:14:29 +0200
commit484652c6322800b32510d6c74d8fc4c8027a106e (patch)
treef3e6d31485ecc79c51d440c600665d76b43da13e /test/pasta/udp
parent6f2db0e34b5aeeba8d303b8bd82e947a2daa9303 (diff)
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udp: Don't pre-initialize msghdr array
In udp_tap_handler() the array of msghdr structures, mm[], is initialized to zero. Since UIO_MAXIOV is 1024, this can be quite a large zero, which is expensive if we only end up using a few of its entries. It also makes it less obvious how we're setting all the control fields at the point we actually invoke sendmmsg(). Rather than pre-initializing it, just initialize each element as we use it. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'test/pasta/udp')
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