On Wed, Jun 25, 2014 at 1:30 AM, Thomas Graf <tg...@noironetworks.com> wrote: > On 06/24/14 at 06:46pm, Jesse Gross wrote: >> Currently, if the network stack provides skb->rxhash then we use it, >> otherwise we compute our own. However, on at least some versions of >> RHEL/CentOS, the stack provides a hash but it is 16 bits rather than >> 32 bits. In cases where we use the upper most bits of the hash this >> is particularly bad because we detect that a hash is present and we >> use it rather than computing our own but the result is always zero. >> >> This is particularly noticible with tunnel ports that use the hash >> to generate a source port, such as VXLAN. On these kernels the source >> port is always zero when using VXLAN. To solve this problem while >> still taking advantage of the procomputed hash, this rehashes the >> hash so that the entropy is spread throughout 32 bits. >> >> Signed-off-by: Jesse Gross <je...@nicira.com> > > Acked-by: Thomas Graf <tg...@noironetworks.com>
Thanks, applied to master and branches back to 2.1. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
