linux-kernel - Re: [PATCH tip:irq/core v1] genirq: remove auto-set of the mask when setting the hint

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Date:   Fri, 21 May 2021 17:15:53 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Nitesh Lal <nilal@...hat.com>
Cc:     Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Robin Murphy <robin.murphy@....com>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
        intel-wired-lan@...ts.osuosl.org, jbrandeb@...nel.org,
        "frederic\@kernel.org" <frederic@...nel.org>,
        "juri.lelli\@redhat.com" <juri.lelli@...hat.com>,
        Alex Belits <abelits@...vell.com>,
        "linux-api\@vger.kernel.org" <linux-api@...r.kernel.org>,
        "bhelgaas\@google.com" <bhelgaas@...gle.com>,
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        "rostedt\@goodmis.org" <rostedt@...dmis.org>,
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        "davem\@davemloft.net" <davem@...emloft.net>,
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        netdev@...r.kernel.org, chris.friesen@...driver.com,
        Marc Zyngier <maz@...nel.org>,
        Neil Horman <nhorman@...driver.com>, pjwaskiewicz@...il.com
Subject: Re: [PATCH tip:irq/core v1] genirq: remove auto-set of the mask when setting the hint

On Fri, May 21 2021 at 09:46, Nitesh Lal wrote:
> On Fri, May 21, 2021 at 7:56 AM Thomas Gleixner <tglx@...utronix.de> wrote:
>> >> - Driver use this API to force a certain affinity mask
>> >>   + In this case we have to replace the API with the irq_force_affinity()
>>
>> irq_set_affinity() or irq_set_affinity_and_hint()
>
> Ah yes! my bad. _force_ doesn't check the mask against the online CPUs.
> Hmm, I didn't realize that you also added irq_set_affinity_and_hint()
> in your last patchset.

I did not. It just exposed irq_set_affinity().

See https://lore.kernel.org/r/87wnrs9tvp.ffs@nanos.tec.linutronix.de
for the new hint interface I came up with.

Thanks,

        tglx