From: Keith Busch <kbusch@kernel.org>
To: Lukas Wunner <lukas@wunner.de>
Cc: "Pali Rohár" <pali@kernel.org>, linux-pci@vger.kernel.org
Subject: Re: PCI service interrupt handlers & access to PCI config space
Date: Sun, 11 Apr 2021 20:25:55 -0600 [thread overview]
Message-ID: <20210412022555.GA41644@C02WT3WMHTD6> (raw)
In-Reply-To: <20210410162622.GA23381@wunner.de>
On Sat, Apr 10, 2021 at 06:26:22PM +0200, Lukas Wunner wrote:
>
> 1.5 sec is definitely too long. This sounds like a quirk of this
> specific hardware. Try to find out if the hardware can be configured
> differently to respond quicker.
While 1.5 sec is long, pcie spec's device control 2 register has an option to
be even longer: up to 64 seconds for a config access timeout! I'm not sure of
the reasoning to allow something that high, but I think the operating system
would be not be too happy with that.
next prev parent reply other threads:[~2021-04-12 2:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-10 12:28 PCI service interrupt handlers & access to PCI config space Pali Rohár
2021-04-10 14:25 ` Lukas Wunner
2021-04-10 15:17 ` Pali Rohár
2021-04-10 16:26 ` Lukas Wunner
2021-04-12 2:25 ` Keith Busch [this message]
2021-04-12 14:04 ` Pali Rohár
2021-04-12 15:09 ` Keith Busch
2021-04-13 9:33 ` Pali Rohár
2021-04-13 9:35 ` Pali Rohár
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