e1000e: Disable TSO for buffer overrun workaround

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Commit b10effb92e ("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.

CC: stable <stable@vger.kernel.org>
Fixes: b10effb92e ("e1000e: fix buffer overrun while the I219 is processing DMA transactions")
BugLink: https://bugs.launchpad.net/bugs/1802691
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

...

This commit is contained in:

Kai-Heng Feng 2020-05-07 22:21:07 +08:00 • committed by Jeff Kirsher

parent 0c80cdbf33

commit f29801030a

1 changed files with 4 additions and 0 deletions

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drivers/net/ethernet/intel/e1000e/netdev.c

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