linux-kernel - Re: [PATCH 2/2] x86: speed cpu_up by quirking cpu_init

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Message-ID: <CAJvTdKk3TM1PMUgGeWCxThzVknfBc8xMK-dJkbxJrwkWhjGzLg@mail.gmail.com>
Date:	Fri, 8 May 2015 14:15:42 -0400
From:	Len Brown <lenb@...nel.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	X86 ML <x86@...nel.org>, Linux PM list <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 2/2] x86: speed cpu_up by quirking cpu_init_udelay

On Fri, May 8, 2015 at 4:32 AM, Borislav Petkov <bp@...en8.de> wrote:

>> +     pr_debug("cpu_init_udelay quirk to %d, was %d", new_udelay, init_udelay);
>
> Can we make this printk(KERN_DEBUG please?
>
> I'd like to be able to slap "debug" on the command line and not
> recompile the kernel. And no, dyndbg="file smpboot.c +p" or whatever the
> syntax is, simply doesn't scale if I want to see all debug messages from
> early boot.

I agree with you.  Further, you made me think about it, and while it was helpful
when I wrote the patch, I don't think any printk() is needed upstream.

see v3 just sent.

Len Brown, Intel Open Source Technology Center
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