diff options
| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2020-05-07 17:21:07 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-20 11:25:17 +0300 |
| commit | 0253648ff58c01b3d0f1d1068ae6ce7588a02ec3 (patch) | |
| tree | 4c802d880b186467ee9acf2b27b3ed286016972b /drivers/net/ethernet | |
| parent | f66813617843ad128ad2c5b7c64abfb89f408474 (diff) | |
| download | linux-0253648ff58c01b3d0f1d1068ae6ce7588a02ec3.tar.xz | |
e1000e: Disable TSO for buffer overrun workaround
commit f29801030ac67bf98b7a65d3aea67b30769d4f7c upstream.
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 <stable@vger.kernel.org>
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 <kai.heng.feng@canonical.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/ethernet')
| -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 1ad345796e80..a517b81be973 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -5271,6 +5271,10 @@ 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 |