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| author | Saeed Mahameed <saeedm@mellanox.com> | 2019-05-23 22:55:10 +0300 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@mellanox.com> | 2019-05-29 04:25:42 +0300 |
| commit | c0194e2d0ef0e5ce5e21a35640d23a706827ae28 (patch) | |
| tree | 990a847ad9193334d06e3d1feff64cff08b5f9a9 /Documentation/siphash.txt | |
| parent | 24bcd210e272c1e5fc712fbc5e5c21f59a21abf7 (diff) | |
| download | linux-c0194e2d0ef0e5ce5e21a35640d23a706827ae28.tar.xz | |
net/mlx5e: Disable rxhash when CQE compress is enabled
When CQE compression is enabled (Multi-host systems), compressed CQEs
might arrive to the driver rx, compressed CQEs don't have a valid hash
offload and the driver already reports a hash value of 0 and invalid hash
type on the skb for compressed CQEs, but this is not good enough.
On a congested PCIe, where CQE compression will kick in aggressively,
gro will deliver lots of out of order packets due to the invalid hash
and this might cause a serious performance drop.
The only valid solution, is to disable rxhash offload at all when CQE
compression is favorable (Multi-host systems).
Fixes: 7219ab34f184 ("net/mlx5e: CQE compression")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'Documentation/siphash.txt')
0 files changed, 0 insertions, 0 deletions