linux-kernel - Re: [REGRESSION] funny sched_domain build failure during resume

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Message-ID: <20140514170238.GB15690@htj.dyndns.org>
Date:	Wed, 14 May 2014 13:02:38 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	Johannes Weiner <hannes@...xchg.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Juri Lelli <juri.lelli@...il.com>
Subject: Re: [REGRESSION] funny sched_domain build failure during resume

On Wed, May 14, 2014 at 04:00:34PM +0200, Peter Zijlstra wrote:
> Does something like the below help any? I noticed those things (cpudl
> and cpupri) had [NR_CPUS] arrays, which is always 'fun'.
> 
> The below is a mostly no thought involved conversion of cpudl which
> boots, I'll also do cpupri and then actually stare at the algorithms to
> see if I didn't make any obvious fails.

Yeah, should avoid large allocation on reasonably sized machines and I
don't think 2k CPU machines suspend regularly.  Prolly good / safe
enough for -stable port?  It'd be still nice to avoid allocations if
possible during online tho given that the operation happens while mm
is mostly crippled.

Thanks.

-- 
tejun
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