From: Philippe Gerum <rpm@xenomai.org>
To: Florian Bezdeka <florian.bezdeka@siemens.com>
Cc: xenomai@lists.linux.dev
Subject: Re: [RFC Dovetail 6.16]: Lockdep warning, IRQ while holding pci_config_lock
Date: Mon, 08 Sep 2025 15:54:31 +0200 [thread overview]
Message-ID: <87a53582y0.fsf@xenomai.org> (raw)
In-Reply-To: <2d7bbdc839cb0f78ddb979b35d491a8f4fb9d0c8.camel@siemens.com> (Florian Bezdeka's message of "Mon, 08 Sep 2025 15:35:43 +0200")
Florian Bezdeka <florian.bezdeka@siemens.com> writes:
> Hi Philippe,
>
> from time to time I can see the following lockdep warning when testing
> on qemu.
>
> I'm not sure if my interpretation is correct. Should we convert
> pci_config_lock into a hard_spin_lock_t?
>
No, we can't convert this lock. This would be a massive trauma, both
with respect to the PCI locking model and latency figures.
--
Philippe.
next prev parent reply other threads:[~2025-09-08 13:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-08 13:35 [RFC Dovetail 6.16]: Lockdep warning, IRQ while holding pci_config_lock Florian Bezdeka
2025-09-08 13:54 ` Philippe Gerum [this message]
2025-09-08 13:56 ` Philippe Gerum
2025-09-08 14:08 ` Philippe Gerum
2025-09-09 14:04 ` Florian Bezdeka
2025-09-10 7:22 ` Philippe Gerum
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