On Tue, 2016-06-28 at 04:33 +0000, Seymour, Shane M wrote: > In previous commit 01f83d69844d307be2aa6fea88b0e8fe5cbdb2f4 > the following comments were added: > > "When peer uses tiny windows, there is no use in packetizing to sub-MSS > pieces for the sake of SWS or making sure there are enough packets in > the pipe for fast recovery." > > The test should be > TCP_MSS_DEFAULT not >= 512. This allows low end > devices that send an MSS of 536 (TCP_MSS_DEFAULT) to see better network > performance by sending it 536 bytes of data at a time instead of bounding > to half window size (268). Other network stacks work this way, e.g. HP-UX.
Trying to cope with ridiculous windows these days is really a waste of time, as we perform this check for all tcp sendmsg() calls :( Anyway, your patch is reversed.
