linux-kernel - Re: [PATCH V2 1/4] ACPI,PCI,IRQ: factor in PCI possible

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Message-ID: <CAJZ5v0j1m4oGJfdOC8uerKc-3ksq6k2e9RdjEnk0sWmsq4RHRQ@mail.gmail.com>
Date:	Wed, 29 Jun 2016 15:13:08 +0200
From:	"Rafael J. Wysocki" <rafael@...nel.org>
To:	Sinan Kaya <okaya@...eaurora.org>
Cc:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Timur Tabi <timur@...eaurora.org>,
	Christopher Covington <cov@...eaurora.org>,
	Jon Masters <jcm@...hat.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	eric.auger@...hat.com, Linux PCI <linux-pci@...r.kernel.org>,
	Andy Gross <agross@...eaurora.org>,
	linux-arm-msm@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, wim@....tudelft.nl,
	perex@...ex.cz, tiwai@...e.com,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 1/4] ACPI,PCI,IRQ: factor in PCI possible

On Wed, Jun 29, 2016 at 10:27 AM, Sinan Kaya <okaya@...eaurora.org> wrote:
> The change introduced in commit 103544d86976 ("ACPI,PCI,IRQ: reduce
> resource requirements") omitted the initially assigned POSSIBLE penalty
> when the IRQ is active.

It would be good to say what can go wrong with that here.

> The original code would assign the POSSIBLE value divided by the number
> of possible IRQs during initialization.
>
> Later, if the IRQ is chosen as the active IRQ or if the IRQ is in use
> by ISA; additional penalties get added.

Thanks,
Rafael