linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Keith Busch <keith.busch@intel.com>
To: Andrei Vagin <avagin@virtuozzo.com>
Cc: linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Xiaolong Ye <xiaolong.ye@intel.com>
Subject: Re: irq/affinity: Fix extra vecs calculation
Date: Wed, 19 Apr 2017 18:45:56 -0400	[thread overview]
Message-ID: <20170419224555.GA21311@localhost.localdomain> (raw)
In-Reply-To: <20170419223205.GA29640@outlook.office365.com>

On Wed, Apr 19, 2017 at 03:32:06PM -0700, Andrei Vagin wrote:
> This patch works for me.

Awesome, thank you much for confirming, and again, sorry for the
breakage. I see virtio-scsi is one reliable way to have reproduced this,
so I'll incorporate that into tests before posting future kernel core
patches.

I'll send this fix with change log shortly.

> > ---
> > diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
> > index d052947..eb8b689 100644
> > --- a/kernel/irq/affinity.c
> > +++ b/kernel/irq/affinity.c
> > @@ -98,13 +98,16 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
> >  		int ncpus, v, vecs_to_assign, vecs_per_node;
> >  
> >  		/* Spread the vectors per node */
> > -		vecs_per_node = (affv - curvec) / nodes;
> > +		vecs_per_node = (affv - (curvec - affd->pre_vectors)) / nodes;
> >  
> >  		/* Get the cpus on this node which are in the mask */
> >  		cpumask_and(nmsk, cpu_online_mask, cpumask_of_node(n));
> > --

      reply	other threads:[~2017-04-19 22:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-13 17:28 [PATCH] " Keith Busch
2017-04-13 21:46 ` [tip:irq/urgent] " tip-bot for Keith Busch
2017-04-19 16:20 ` Andrei Vagin
2017-04-19 17:03   ` Keith Busch
2017-04-19 19:11     ` Andrei Vagin
2017-04-19 19:53     ` Andrei Vagin
2017-04-19 21:53       ` Keith Busch
2017-04-19 22:32         ` Andrei Vagin
2017-04-19 22:45           ` Keith Busch [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170419224555.GA21311@localhost.localdomain \
    --to=keith.busch@intel.com \
    --cc=avagin@virtuozzo.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=tglx@linutronix.de \
    --cc=xiaolong.ye@intel.com \
    --subject='Re: irq/affinity: Fix extra vecs calculation' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).