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From: Tejun Heo <tj@kernel.org>
To: Aaron Tomlin <atomlin@atomlin.com>
Cc: leitao@debian.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] tools/workqueue/wq_dump.py: Add busy worker inspection and BH pool states
Date: Wed, 23 Sep 2026 09:27:36 -1000	[thread overview]
Message-ID: <731a01cb1a08c0b66af6a772a4cdac10@kernel.org> (raw)
In-Reply-To: <20260923031344.60494-1-atomlin@atomlin.com>

Hello, Aaron.

On Tue, Sep 22, 2026 at 11:13:44PM -0400, Aaron Tomlin wrote:
> +                            fn_name = prog.symbol(func).name
...
> +                        except (drgn.FaultError, LookupError):
> +                            continue

prog.symbol() raises LookupError when drgn has no symbol for the address,
e.g. a work function in a module whose debug info drgn didn't load. That
gets retried like a transient fault and the busy worker is then dropped
without any output. Maybe fall back to the raw address?

    try:
        fn_name = prog.symbol(func).name
    except LookupError:
        fn_name = hex(func)

Thanks.

--
tejun

  reply	other threads:[~2026-09-23 19:27 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-23  3:13 Aaron Tomlin
2026-09-23 19:27 ` Tejun Heo [this message]
2026-09-23 22:04   ` Aaron Tomlin

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