> On Jan 13, 2017, at 5:42 PM, Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx> wrote: > >>>> >>>>> (haven't looked in detail at your patches...sorry). Our QA ran > testing on >>> 4.9 >>>>> and didn't see this issue, so that's why I'm asking. They have not > yet >>> run >>>>> NFS/RDMA testing on 4.9-rc. I've asked them to do a quick regression >> test >>> asap. >>>> >>> >>> Correction: I meant 4.10-rc above. >>> >>> But still, I believe Chelsio tested 4.9, so perhaps it isn't the "mount" > that >>> causes a failure but trying to send something with an SGE > 4 that > happens >>> immediately after the mount? And since cxgb4 supports up to 17, the >> failure >>> wouldn't be seen until some inline message was attempted that required >> 18 >>> sges... >> >> The original check for 18 or 19 was too aggressive (that's the >> bug here). With the default inline threshold settings, RPC-over-RDMA >> won't ever use more than 4 (or at most 5) SGEs for RDMA Send. >> >> So if somehow the mount was allowed, and no changes were made to the >> default settings, everything should still work fine for cxgb4. >> > > Hey Chuck, Chelsio confirmed mounts fail with 4.10-rc. So can you get a fix > in 4.10-rc (and back to 4.9 if the regression is there) to ensure at least a > max_sge of 4 is supported? Posted earlier today: Available in the "nfs-rdma-for-4.10-rc" topic branch of this git repo: git://git.linux-nfs.org/projects/cel/cel-2.6.git -- Chuck Lever -- 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
