From: Shaohua Li <shaohua.li@intel.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>,
lkml <linux-kernel@vger.kernel.org>,
"Chen, Tim C" <tim.c.chen@intel.com>
Subject: Re: [patch]x86: spread tlb flush vector between nodes
Date: Wed, 20 Oct 2010 09:13:41 +0800 [thread overview]
Message-ID: <1287537221.15980.3.camel@sli10-conroe.sh.intel.com> (raw)
In-Reply-To: <20101019133426.GB11654@basil.fritz.box>
On Tue, 2010-10-19 at 21:34 +0800, Andi Kleen wrote:
> >
> > +static int tlb_vector_offset[NR_CPUS] __read_mostly;
>
> Never use NR_CPUS. Always use per cpu data.
>
> Otherwise you waste a lot of space on a CONFIG_MAX_SMP
> kernel running on a smaller box.
ha, I want it to be __read_mostly to avoid cache pollution, apparently
we have no per cpu API to do this. Maybe I need add one.
Thanks,
Shaohua
next prev parent reply other threads:[~2010-10-20 1:13 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-13 7:41 Shaohua Li
2010-10-13 8:16 ` Andi Kleen
2010-10-13 8:39 ` Shaohua Li
2010-10-13 11:19 ` Ingo Molnar
2010-10-19 5:39 ` Shaohua Li
2010-10-19 6:21 ` H. Peter Anvin
2010-10-19 8:44 ` Ingo Molnar
2010-10-19 8:55 ` Shaohua Li
2010-10-19 10:37 ` Ingo Molnar
2010-10-19 13:28 ` Shaohua Li
2010-10-19 13:34 ` Andi Kleen
2010-10-20 1:13 ` Shaohua Li [this message]
2010-10-20 2:39 ` H. Peter Anvin
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