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authorDave Barach <dave@barachs.net>2019-03-07 10:06:52 -0500
committerDamjan Marion <dmarion@me.com>2019-03-07 19:39:28 +0000
commit974931f162820bd4ba41a43cae9578171cf0e3d1 (patch)
tree8025ada44b91bb3c2f863bc98e80894794e1fd3b /extras
parentf7c1a70ba502c83d6e5813344c01edbdfbff6738 (diff)
Honor vnet_rewrite_data_t data_bytes == 0
Avoid the cache miss consequences of spraying [functionally harmless] junk into un-prefetched rewrite space. As things stand, several tunnel encap rewrites set rewrite data_bytes = 0, and take a performance hit due to unwanted speculative copying. Should be performance-neutral in speed-path cases, which won't execute the added check. Change-Id: Id83c0325e58c0f31631b4bae5a06457dfc7ed567 Signed-off-by: Dave Barach <dave@barachs.net>
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