From: "Chen, Gong" <gong.chen@linux.intel.com>
To: Prarit Bhargava <prarit@redhat.com>
Cc: Tony Luck <tony.luck@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
X86-ML <x86@kernel.org>, Michel Lespinasse <walken@google.com>,
Andi Kleen <ak@linux.intel.com>,
Seiji Aguchi <seiji.aguchi@hds.com>,
Yang Zhang <yang.z.zhang@intel.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
janet.morgan@intel.com, "Yu, Fenghua" <fenghua.yu@intel.com>
Subject: Re: [PATCH] x86: Add check for number of available vectors before CPU down [v2]
Date: Fri, 20 Dec 2013 02:18:20 -0500 [thread overview]
Message-ID: <20131220071820.GC4571@gchen.bj.intel.com> (raw)
In-Reply-To: <52B336D4.8010809@redhat.com>
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On Thu, Dec 19, 2013 at 01:11:32PM -0500, Prarit Bhargava wrote:
>
> Yep. The question really is this: is the irq mapped to a single vector or
> multiple vectors. (I think)
>
> P.
>
Yes, this is the original thought I want to express on the bugzilla. On an
ideal environment, without irq balance, all vector_irq should own same
values, say, 0xffffffff. So when one CPU is off-lined, your patch will
considers no places to contain these to-be-migrated irqs but the fact is
they are shared on different CPUs. So if we can answer this question,
the answer will be clear :-).
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next prev parent reply other threads:[~2013-12-20 7:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-18 19:29 [PATCH] x86: Add check for number of available vectors before CPU down [v2] Prarit Bhargava
2013-12-18 19:50 ` Tony Luck
2013-12-19 18:05 ` Tony Luck
2013-12-19 18:11 ` Prarit Bhargava
2013-12-20 7:18 ` Chen, Gong [this message]
2013-12-20 9:41 ` rui wang
2013-12-20 10:49 ` Prarit Bhargava
2013-12-28 17:10 ` Prarit Bhargava
2013-12-30 7:44 ` Chen, Gong
2013-12-30 15:09 ` Prarit Bhargava
2013-12-30 12:56 ` rui wang
2013-12-30 15:08 ` Prarit Bhargava
2013-12-31 2:58 ` rui wang
2013-12-31 21:22 ` Prarit Bhargava
2014-01-02 2:41 ` Chen, Gong
2014-01-02 12:57 ` Prarit Bhargava
2014-01-02 16:04 ` Prarit Bhargava
2013-12-30 17:22 ` Prarit Bhargava
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