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From: Borislav Petkov <bp@alien8.de>
To: Wei Yang <richard.weiyang@gmail.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
	tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
	tj@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [Patch V2 2/2] x86/mm/numa: remove the numa_nodemask_from_meminfo()
Date: Thu, 6 Apr 2017 20:48:38 +0200
Message-ID: <20170406184838.z4pa4j33z2rp4mrg@pd.tnic> (raw)
In-Reply-To: <20170406182147.mwifrukq7ylczi6i@node.shutemov.name>

On Thu, Apr 06, 2017 at 09:21:47PM +0300, Kirill A. Shutemov wrote:
> > Long story short, something as trivial as this helps here:
> 
> Yep. Works for me.
> 
> Reported-and-tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>

Thanks.

Now, I'd really like to have more test coverage and be sure this
"cleanup" doesn't break anything else so Wei, please grab tip/master,
apply the oneliner from two messages ago, take Kirill's qemu cmdline
and run all fake numa scenarios you can think of to make sure your
cleanup doesn't break anything else.

Qemu can emulate real numa too, for example you can boot with:

-smp 64 \
-numa node,nodeid=0,cpus=1-8 \
-numa node,nodeid=1,cpus=9-16 \
-numa node,nodeid=2,cpus=17-24 \
-numa node,nodeid=3,cpus=25-32 \
-numa node,nodeid=4,cpus=0 \
-numa node,nodeid=4,cpus=33-39 \
-numa node,nodeid=5,cpus=40-47 \
-numa node,nodeid=6,cpus=48-55 \
-numa node,nodeid=7,cpus=56-63

after configuring the kernel accordingly.

Then, test baremetal too.

numa_emulation() should give you an idea about possible options
numa=fake takes. Documentation/x86/x86_64/boot-options.txt has some
(all?) too.

Thanks.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-14  3:08 [Patch V2 1/2] x86/mm/numa: trivial fix on typo and error message Wei Yang
2017-03-14  3:08 ` [Patch V2 2/2] x86/mm/numa: remove the numa_nodemask_from_meminfo() Wei Yang
2017-04-03  9:58   ` [tip:x86/mm] x86/mm/numa: Remove numa_nodemask_from_meminfo() tip-bot for Wei Yang
2017-04-06 12:44   ` [Patch V2 2/2] x86/mm/numa: remove the numa_nodemask_from_meminfo() Kirill A. Shutemov
2017-04-06 14:59     ` Borislav Petkov
2017-04-06 15:42       ` Kirill A. Shutemov
2017-04-06 18:01         ` Borislav Petkov
2017-04-06 18:21           ` Kirill A. Shutemov
2017-04-06 18:48             ` Borislav Petkov [this message]
2017-04-09  3:12               ` Wei Yang
2017-04-10 12:43                 ` Borislav Petkov
2017-04-10 16:39                   ` Wei Yang
2017-04-03  9:57 ` [tip:x86/mm] x86/mm/numa: Improve alloc_node_data() error path message tip-bot for Wei Yang

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