diff options
| author |   Eric Dumazet <edumazet@google.com> | 2018-09-27 09:32:00 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-09-28 11:12:29 -0700 |
| commit | a4f570be654de779eaf626a79c4e0aa5a790505f (patch) | |
| tree | 78ea33a09a2817acd3a286aaa760f0db22e6af0f /drivers/net/ethernet/ibm/ibmvnic.c | |
| parent | sfc: remove ndo_poll_controller (diff) | |
| download | linux-dev-a4f570be654de779eaf626a79c4e0aa5a790505f.tar.xz linux-dev-a4f570be654de779eaf626a79c4e0aa5a790505f.zip | |
sfc-falcon: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.
sfc-falcon uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Solarflare linux maintainers <linux-net-drivers@solarflare.com>
Cc: Edward Cree <ecree@solarflare.com>
Cc: Bert Kenward <bkenward@solarflare.com>
Acked-By: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions