diff options
| author | Eric Dumazet <[email protected]> | 2018-04-18 11:43:15 -0700 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2018-04-19 13:44:11 -0400 |
| commit | 88078d98d1bb085d72af8437707279e203524fa5 (patch) | |
| tree | bf20f9ebb371aa14ce699ad9be0afc093babd04b /tools/perf/scripts/python/intel-pt-events.py | |
| parent | 292eba02dbb4c41da840e462e51ee97d80d873d1 (diff) | |
net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends
After working on IP defragmentation lately, I found that some large
packets defeat CHECKSUM_COMPLETE optimization because of NIC adding
zero paddings on the last (small) fragment.
While removing the padding with pskb_trim_rcsum(), we set skb->ip_summed
to CHECKSUM_NONE, forcing a full csum validation, even if all prior
fragments had CHECKSUM_COMPLETE set.
We can instead compute the checksum of the part we are trimming,
usually smaller than the part we keep.
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/intel-pt-events.py')
0 files changed, 0 insertions, 0 deletions