From: Shaohua Li <shaohua.li@intel.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Andi Kleen <andi@firstfloor.org>, "hpa@zytor.com" <hpa@zytor.com>
Subject: Re: [RFC 4/4]x86: avoid tlbstate lock if no enough cpus
Date: Wed, 03 Nov 2010 15:19:55 +0800 [thread overview]
Message-ID: <1288768795.23014.123.camel@sli10-conroe> (raw)
In-Reply-To: <1288768330.2467.660.camel@edumazet-laptop>
On Wed, 2010-11-03 at 15:12 +0800, Eric Dumazet wrote:
> Le mercredi 03 novembre 2010 à 15:06 +0800, Shaohua Li a écrit :
> > just don't want to include the non-present cpus here. I wonder why we
> > haven't a variable to record online cpu number.
>
> What prevents a 256 cpus machine, to have 8 online cpus that all use the
> same TLB vector ?
>
> (Max 32 vectors, so 8 cpus share each vector, settled at boot time)
>
> Forget about 'online', and think 'possible' ;)
Hmm, the spread vectors to node already merged, how could the 8 cpus
share a vector?
next prev parent reply other threads:[~2010-11-03 7:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-03 6:44 Shaohua Li
2010-11-03 6:59 ` Eric Dumazet
2010-11-03 7:06 ` Shaohua Li
2010-11-03 7:12 ` Eric Dumazet
2010-11-03 7:19 ` Shaohua Li [this message]
2010-11-03 7:25 ` Eric Dumazet
2010-11-03 7:31 ` Eric Dumazet
[not found] ` <1288773716.23014.124.camel@sli10-conroe>
2010-11-03 9:08 ` Eric Dumazet
2010-11-04 5:21 ` Shaohua Li
2010-11-04 5:42 ` Eric Dumazet
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