linux-kernel - Re: [PATCH 1/2] x86 smpboot: fix cpu_init

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Message-ID: <60ad3f7df9604e39d9af180f6b56bb69@teksavvy.com>
Date:	Thu, 05 Nov 2015 21:39:26 -0500
From:	shrybman <shrybman@...savvy.com>
To:	"Len Brown" <lenb@...nel.org>
Cc:	"Len Brown" <len.brown@...el.com>, "X86 ML" <x86@...nel.org>,
	dparsons@...ghtdsl.net, "Linux PM list" <linux-pm@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] x86 smpboot: fix cpu_init_udelay=10000

> > Is this really what you intended? The else is commented out so if init_udelay is quirked
> > to be 0 it will always be reset to UDELAY_10MS_DEFAULT. Also init_udelay is unsigned, so
> > would UINT_MAX be a better choice?
> 
> Hi Shane,
> Thanks for pointing out this flaw.
> Seems it will make 4.3 10ms slower than 4.2 on these boxes, by default.
> We'll send an incremental patch for 4.4.


Sounds good. Thanks Len.

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