On Wed, Jul 06, 2016 at 10:09:51AM -0700, Roland Dreier wrote: > Hi, > > https://bugzilla.kernel.org/show_bug.cgi?id=111921 describes a > performance regression introduced by commit 9207f9d45b0a ("net: > preserve IP control block during GSO segmentation"). I've recently > run into this when updating my system, since that commit hit stable > kernel 4.4.y — in my case I noticed because scp over an IPoIB link > went from ~200 MB/sec down to below 1 MB/sec. I confirmed that > reverting that change did fix my performance. Same for us. > > Obviously just reverting that commit isn't the right answer, since I > believe the patch description that says the commit fixes a crash. > However before I start working on this myself, I want to make sure I'm > not duplicating anyone else's work. Doug, you mentioned having time > to work on it back in May — did you figure anything out? Or is anyone > else investigating this? Adding Haakon which as far as i recall has some insights. > > Thanks, > Roland > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
