Thank you Neal. Most likely I will test the patch on Monday and report back the result.
As for the TcpExtTCPSACKReneging counter, attached is the captured counter value on a 1-second interval for 10 minutes. Thanks, Grant
reneg.log
Description: Binary data
> On May 30, 2015, at 10:29 AM, Neal Cardwell <ncardw...@google.com> wrote: > > On Fri, May 29, 2015 at 3:53 PM, Grant Zhang <gzh...@fastly.com> wrote: >> Hi Neal, >> >> I will be more happy to test the patch. Please send it my way. > > Great. Thank you so much for being willing to do this. Attached is a > patch for testing. I generated it and tested it relative to Linux > v3.14.39, since your stack trace seemed to suggest that you were > seeing this on some variant of v3.14.39. (Newer kernels would need a > slightly different patch, since the reneging code path has changed a > little since 3.14.) > > Can you please try it out and see if it makes that warning go away? > > Also, I would be interested in seeing the value of your > TcpExtTCPSACKReneging counter, and some sense of how fast that value > is increasing, on a machine that's seeing this issue: > nstat -z -a | grep Reneg > > Thanks! > > neal > <0001-RFC-for-tests-on-v3.14.39-tcp-resegment-skbs-that-we.patch>
