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Date: Mon, 14 Apr 2014 16:48:39 -0400 (EDT) From: David Miller <davem@...emloft.net> To: dborkman@...hat.com Cc: netdev@...r.kernel.org, linux-sctp@...r.kernel.org, matija.glavinic-pecotic.ext@....com, alexander.sverdlin@....com, vyasevich@...il.com Subject: Re: [PATCH net] Revert "net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer" From: Daniel Borkmann <dborkman@...hat.com> Date: Mon, 14 Apr 2014 21:45:17 +0200 > This reverts commit ef2820a735f7 ("net: sctp: Fix a_rwnd/rwnd management > to reflect real state of the receiver's buffer") as it introduced a > serious performance regression on SCTP over IPv4 and IPv6, though a not > as dramatic on the latter. Measurements are on 10Gbit/s with ixgbe NICs. > > Current state: ... > With the reverted patch applied, the SCTP/IPv4 performance is back > to normal on latest upstream for IPv4 and IPv6 and has same throughput > as 3.4.2 test kernel, steady and interval reports are smooth again. > > Fixes: ef2820a735f7 ("net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer") > Reported-by: Peter Butler <pbutler@...usnet.com> > Reported-by: Dongsheng Song <dongsheng.song@...il.com> > Reported-by: Fengguang Wu <fengguang.wu@...el.com> > Tested-by: Peter Butler <pbutler@...usnet.com> > Signed-off-by: Daniel Borkmann <dborkman@...hat.com> Applied and queued up for -stable. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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