linux-kernel - Re: [patch 07/32] genirq/msi: Count the allocated MSI descriptors

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Date:   Sun, 28 Nov 2021 20:23:15 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Marc Zygnier <maz@...nel.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Megha Dey <megha.dey@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, linux-pci@...r.kernel.org,
        linux-s390@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Jon Mason <jdmason@...zu.us>,
        Dave Jiang <dave.jiang@...el.com>,
        Allen Hubbe <allenbh@...il.com>, linux-ntb@...glegroups.com
Subject: Re: [patch 07/32] genirq/msi: Count the allocated MSI descriptors

On Sun, Nov 28 2021 at 12:07, Greg Kroah-Hartman wrote:
> On Sat, Nov 27, 2021 at 08:45:18PM +0100, Thomas Gleixner wrote:
>> On Sat, Nov 27 2021 at 20:22, Thomas Gleixner wrote:
>> 
>> > On Sat, Nov 27 2021 at 13:19, Greg Kroah-Hartman wrote:
>> >> On Sat, Nov 27, 2021 at 02:22:38AM +0100, Thomas Gleixner wrote:
>> >>> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
>> >>
>> >> No changelog?
>> >
>> > Bah. This one should not be there at all.
>> >
>> >> Anyway, why do we care about the number of decriptors?
>> 
>> The last part of this really cares about it for the dynamic extension
>> part, but that's core code which looks at the counter under the lock.
>
> Ah, that should be documented well as right now you are saying "this is
> done lockless" in the comment :)

I already zapped the whole patch as the function is not required for the
core code.

Thanks,

        tglx