git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-04-23 08:55:56 -04:00
Code Issues Packages Projects Releases Wiki Activity

netdevsim: call napi_schedule from a timer context

Browse Source 
The netdevsim driver was experiencing NOHZ tick-stop errors during packet
transmission due to pending softirq work when calling napi_schedule().
This issue was observed when running the netconsole selftest, which
triggered the following error message:

  NOHZ tick-stop error: local softirq work is pending, handler #08!!!

To fix this issue, introduce a timer that schedules napi_schedule()
from a timer context instead of calling it directly from the TX path.

Create an hrtimer for each queue and kick it from the TX path,
which then schedules napi_schedule() from the timer context.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20250219-netdevsim-v3-1-811e2b8abc4c@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao
2025-02-19 08:41:20 -08:00
committed by Jakub Kicinski
parent 372ab5a5fe
commit bf3624cf1c
2 changed files with 21 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/netdevsim/netdevsim.h
View File

@@ -97,6 +97,7 @@ struct nsim_rq {
struct napi_struct napi;
struct sk_buff_head skb_queue;
struct page_pool *page_pool;
struct hrtimer napi_timer;
};
struct netdevsim {