> From: [email protected] <[email protected]> On > Behalf Of Kai-Heng Feng > Sent: Thursday, May 7, 2020 7:21 AM > To: Kirsher, Jeffrey T <[email protected]> > Cc: Kai-Heng Feng <[email protected]>; David S. Miller > <[email protected]>; Neftin, Sasha <[email protected]>; Dima > Ruinskiy <[email protected]>; Avargil, Raanan > <[email protected]>; moderated list:INTEL ETHERNET DRIVERS <intel- > [email protected]>; open list:NETWORKING DRIVERS > <[email protected]>; open list <[email protected]> > Subject: [PATCH] e1000e: Disable TSO for buffer overrun workaround > > Commit b10effb92e27 ("e1000e: fix buffer overrun while the I219 is > processing DMA transactions") imposes roughly 30% performance penalty. > > The commit log states that "Disabling TSO eliminates performance loss > for TCP traffic without a noticeable impact on CPU performance", so > let's disable TSO by default to regain the loss. > > Fixes: b10effb92e27 ("e1000e: fix buffer overrun while the I219 is processing > DMA transactions") > BugLink: https://bugs.launchpad.net/bugs/1802691 > Signed-off-by: Kai-Heng Feng <[email protected]> > --- > drivers/net/ethernet/intel/e1000e/netdev.c | 4 ++++ > 1 file changed, 4 insertions(+) Tested-by: Aaron Brown <[email protected]>
