diff options
| author | Kai-Heng Feng <[email protected]> | 2020-05-07 22:21:07 +0800 |
|---|---|---|
| committer | Jeff Kirsher <[email protected]> | 2020-05-22 18:21:52 -0700 |
| commit | f29801030ac67bf98b7a65d3aea67b30769d4f7c (patch) | |
| tree | 97e41b08076095bb19d0a10c886507c481035eeb | |
| parent | 0c80cdbf33207c7aea1aec9027ad8011bd6178ad (diff) | |
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.
CC: stable <[email protected]>
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]>
Tested-by: Aaron Brown <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index e0b074820b47..66609cf689de 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -5294,6 +5294,10 @@ static void e1000_watchdog_task(struct work_struct *work) /* oops */ break; } + if (hw->mac.type == e1000_pch_spt) { + netdev->features &= ~NETIF_F_TSO; + netdev->features &= ~NETIF_F_TSO6; + } } /* enable transmits in the hardware, need to do this |