David Miller <da...@davemloft.net> writes: > From: fengguang...@intel.com > Date: Tue, 22 Oct 2013 22:41:29 +0100 > >> We noticed big netperf throughput regressions >> >> a4fe34bf902b8f709c63 2e685cad57906e19add7 >> ------------------------ ------------------------ >> 707.40 -40.7% 419.60 >> lkp-nex04/micro/netperf/120s-200%-TCP_STREAM >> 2775.60 -23.7% 2116.40 >> lkp-sb03/micro/netperf/120s-200%-TCP_STREAM >> 3483.00 -27.2% 2536.00 TOTAL >> netperf.Throughput_Mbps >> >> and bisected it to >> >> commit 2e685cad57906e19add7189b5ff49dfb6aaa21d3 >> Author: Eric W. Biederman <ebied...@xmission.com> >> Date: Sat Oct 19 16:26:19 2013 -0700 >> >> tcp_memcontrol: Kill struct tcp_memcontrol > > Eric please look into this, I'd rather have a fix to apply than revert your > work.
Will do I expect some ordering changed, and that changed the cache line behavior. If I can't find anything we can revert this one particular patch without affecting anything else, but it would be nice to keep the data structure smaller. Fengguag what would I need to do to reproduce this? Eric -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
