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d0a81f67cd
The default TX queue length of Ethernet devices have been a magic constant of 1000, ever since the initial git import. Looking back in historical trees[1][2] the value used to be 100, with the same comment "Ethernet wants good queues". The commit[3] that changed this from 100 to 1000 didn't describe why, but from conversations with Robert Olsson it seems that it was changed when Ethernet devices went from 100Mbit/s to 1Gbit/s, because the link speed increased x10 the queue size were also adjusted. This value later caused much heartache for the bufferbloat community. This patch merely moves the value into a defined constant. [1] https://git.kernel.org/cgit/linux/kernel/git/davem/netdev-vger-cvs.git/ [2] https://git.kernel.org/cgit/linux/kernel/git/tglx/history.git/ [3] https://git.kernel.org/tglx/history/c/98921832c232 Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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