On Wed, Oct 25, 2017 at 01:53:11PM -0600, Jason Gunthorpe wrote: > On Wed, Oct 25, 2017 at 10:03:52PM +0300, Leon Romanovsky wrote: > > On Wed, Oct 25, 2017 at 01:58:59PM -0400, Doug Ledford wrote: > > > On Tue, 2017-10-17 at 18:18 +0300, Leon Romanovsky wrote: > > > > From: Noa Osherovich <noaos@xxxxxxxxxxxx> > > > > > > > > There are root complexes that are able to optimize their > > > > performance when incoming data is multiple full cache lines. > > > > > > > > Scatter end padding is the device's ability to pad the ending of > > > > incoming packets (scatter) > > > > > > I hate this naming. I'm sure people inside of Mellanox have gotten > > > used to it, but this feature really has no bearing on scatter/gather at > > > all. This is merely final write padding. You might have a > > > scatter/gather list, you might have a single buffer. Either way, the > > > PCI root complex couldn't care less about scatter/gather or not, it's > > > all a byte stream to it. I would be much happier with a name that > > > reflected what this really does. > > > > Scatter has more broad meaning than "scatter/gather list". The name > > here came from statistical meaning of "scatter", I'll try to come into > > something more descriptive. > > I don't like it either.. We usually call this 'alignment padding' in CS. We can return to our initial internal name - "RX end padding". I'll consult with architecture tomorrow to hear their suggestion. Thanks > > Jason
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