bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

net: Extend NAPI threaded polling to allow kthread based busy polling

Browse Source 
Add a new state NAPI_STATE_THREADED_BUSY_POLL to the NAPI state enum to
enable and disable threaded busy polling.

When threaded busy polling is enabled for a NAPI, enable
NAPI_STATE_THREADED also.

When the threaded NAPI is scheduled, set NAPI_STATE_IN_BUSY_POLL to
signal napi_complete_done not to rearm interrupts.

Whenever NAPI_STATE_THREADED_BUSY_POLL is unset, the
NAPI_STATE_IN_BUSY_POLL will be unset, napi_complete_done unsets the
NAPI_STATE_SCHED_THREADED bit also, which in turn will make the kthread
go to sleep.

Signed-off-by: Samiullah Khawaja <skhawaja@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Acked-by: Martin Karsten <mkarsten@uwaterloo.ca>
Tested-by: Martin Karsten <mkarsten@uwaterloo.ca>
Link: https://patch.msgid.link/20251028203007.575686-2-skhawaja@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Samiullah Khawaja
2025-10-28 20:30:05 +00:00
committed by Jakub Kicinski
parent 998b5d9683
commit c18d4b190a
8 changed files with 109 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
Documentation/netlink/specs/netdev.yaml
View File

@@ -88,7 +88,7 @@ definitions:
-
name: napi-threaded
type: enum
entries: [disabled, enabled]
entries: [disabled, enabled, busy-poll]
attribute-sets:
-
@@ -291,7 +291,8 @@ attribute-sets:
name: threaded
doc: Whether the NAPI is configured to operate in threaded polling
mode. If this is set to enabled then the NAPI context operates
in threaded polling mode.
in threaded polling mode. If this is set to busy-poll, then the
threaded polling mode also busy polls.
type: u32
enum: napi-threaded
-