[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <Zj5PtvnSMoLPjg0o@kbusch-mbp.dhcp.thefacebook.com>
Date: Fri, 10 May 2024 10:47:50 -0600
From: Keith Busch <kbusch@...nel.org>
To: Ming Lei <ming.lei@...hat.com>
Cc: Keith Busch <kbusch@...a.com>, linux-nvme@...ts.infradead.org,
linux-kernel@...r.kernel.org, hch@....de, tglx@...utronix.de
Subject: Re: [PATCH 1/2] genirq/affinity: remove rsvd check against minvec
On Fri, May 10, 2024 at 11:15:54PM +0800, Ming Lei wrote:
> On Fri, May 10, 2024 at 07:14:58AM -0700, Keith Busch wrote:
> > From: Keith Busch <kbusch@...nel.org>
> >
> > The reserved vectors are just the desired vectors that don't need to be
> > managed.
> >
> > Signed-off-by: Keith Busch <kbusch@...nel.org>
> > ---
> > kernel/irq/affinity.c | 3 ---
> > 1 file changed, 3 deletions(-)
> >
> > diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
> > index 44a4eba80315c..74b7cccb51a16 100644
> > --- a/kernel/irq/affinity.c
> > +++ b/kernel/irq/affinity.c
> > @@ -113,9 +113,6 @@ unsigned int irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
> > unsigned int resv = affd->pre_vectors + affd->post_vectors;
> > unsigned int set_vecs;
> >
> > - if (resv > minvec)
> > - return 0;
> > -
>
> This behavior is introduced in 6f9a22bc5775 ("PCI/MSI: Ignore affinity if pre/post
> vector count is more than min_vecs"), which is one bug fix.
Thanks for the pointer. Probably best I avoid messing with irq code just
for this use case, so I can have the driver disable the PCI_IRQ_AFFINTY
flag instead ... assuming hch doesn't "nak" it. :)
Powered by blists - more mailing lists