On Tue, Nov 01, 2016 at 10:50:01AM +0000, Russell King wrote: > The coalesce settings behave badly when changing just one value: > > ... # ethtool -c eth0 > rx-usecs: 249 > ... # ethtool -C eth0 tx-usecs 250 > ... # ethtool -c eth0 > rx-usecs: 248 > > This occurs due to rounding errors when calculating the microseconds > value - the divisons round down. This causes (eg) the rx-usecs to > decrease by one every time the tx-usecs value is set as per the above. > > Fix this by making the divison round-to-nearest. > > Signed-off-by: Russell King <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]> Andrew
