From: patchwork-bot+netdevbpf@kernel.org
To: YiFei Zhu <zhuyifei@google.com>
Cc: kuba@kernel.org, davem@davemloft.net, edumazet@google.com,
pabeni@redhat.com, skhawaja@google.com, netdev@vger.kernel.org,
almasrymina@google.com, willemb@google.com, joe@dama.to,
stable@vger.kernel.org
Subject: Re: [PATCH net] net: Fix rcu_tasks stall in threaded busypoll
Date: Tue, 03 Mar 2026 12:50:05 +0000 [thread overview]
Message-ID: <177254220530.856851.6609682429987870648.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260227221937.1060857-1-zhuyifei@google.com>
Hello:
This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@redhat.com>:
On Fri, 27 Feb 2026 22:19:37 +0000 you wrote:
> I was debugging a NIC driver when I noticed that when I enable
> threaded busypoll, bpftrace hangs when starting up. dmesg showed:
>
> rcu_tasks_wait_gp: rcu_tasks grace period number 85 (since boot) is 10658 jiffies old.
> rcu_tasks_wait_gp: rcu_tasks grace period number 85 (since boot) is 40793 jiffies old.
> rcu_tasks_wait_gp: rcu_tasks grace period number 85 (since boot) is 131273 jiffies old.
> rcu_tasks_wait_gp: rcu_tasks grace period number 85 (since boot) is 402058 jiffies old.
> INFO: rcu_tasks detected stalls on tasks:
> 00000000769f52cd: .N nvcsw: 2/2 holdout: 1 idle_cpu: -1/64
> task:napi/eth2-8265 state:R running task stack:0 pid:48300 tgid:48300 ppid:2 task_flags:0x208040 flags:0x00004000
> Call Trace:
> <TASK>
> ? napi_threaded_poll_loop+0x27c/0x2c0
> ? __pfx_napi_threaded_poll+0x10/0x10
> ? napi_threaded_poll+0x26/0x80
> ? kthread+0xfa/0x240
> ? __pfx_kthread+0x10/0x10
> ? ret_from_fork+0x31/0x50
> ? __pfx_kthread+0x10/0x10
> ? ret_from_fork_asm+0x1a/0x30
> </TASK>
>
> [...]
Here is the summary with links:
- [net] net: Fix rcu_tasks stall in threaded busypoll
https://git.kernel.org/netdev/net/c/1a86a1f7d889
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
prev parent reply other threads:[~2026-03-03 12:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-27 22:19 [PATCH net] net: Fix rcu_tasks stall in threaded busypoll YiFei Zhu
2026-02-27 22:56 ` Samiullah Khawaja
2026-03-03 12:50 ` patchwork-bot+netdevbpf [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=177254220530.856851.6609682429987870648.git-patchwork-notify@kernel.org \
--to=patchwork-bot+netdevbpf@kernel.org \
--cc=almasrymina@google.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=joe@dama.to \
--cc=kuba@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=skhawaja@google.com \
--cc=stable@vger.kernel.org \
--cc=willemb@google.com \
--cc=zhuyifei@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox