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From: Ingo Molnar <mingo@kernel.org>
To: Dave Young <dyoung@redhat.com>
Cc: matt.fleming@intel.com, hpa@zytor.com, akpm@linux-foundation.org,
	x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ignore ,keep for efi earlyprintk
Date: Thu, 24 Apr 2014 12:45:40 +0200	[thread overview]
Message-ID: <20140424104540.GA5834@gmail.com> (raw)
In-Reply-To: <20140424093658.GA7158@dhcp-16-198.nay.redhat.com>


* Dave Young <dyoung@redhat.com> wrote:

> earlyprint=efi,keep results a kernel hang after "Freeing unused kernel memory"

That's a bug.

> 
> Actually efi earlyprintk is using __init functions such as early_ioremap etc.
> Thus efi earlyconsole can not be kept.
> 
> So just ignore it and give out a warning to user.

So, bugs should be fixed, not worked around.

earlyprintk=,keep is really useful for the occasional difficult low 
level bug in the printk code or similar, because earlyprintk is a 
completely separate code path from printk().

Thanks,

	Ingo

  reply	other threads:[~2014-04-24 10:45 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-24  9:36 [PATCH] ignore ,keep for efi earlyprintk Dave Young
2014-04-24 10:45 ` Ingo Molnar [this message]
2014-04-25  1:53   ` Dave Young
     [not found] ` <20140424093658.GA7158-je1gSBvt1Tc/CGXRbJeUwh/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
2014-04-25 11:53   ` Matt Fleming
2014-04-25 11:53     ` Matt Fleming
     [not found]     ` <20140425115345.GC26088-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-04-26  7:28       ` Dave Young
2014-04-26  7:28         ` Dave Young
     [not found]         ` <20140426072821.GA2286-4/PLUo9XfK/1wF9wiOj0lkEOCMrvLtNR@public.gmane.org>
2014-04-29  9:45           ` Matt Fleming
2014-04-29  9:45             ` Matt Fleming
     [not found]             ` <20140429094539.GD26088-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-04-29 10:03               ` Dave Young
2014-04-29 10:03                 ` Dave Young
2014-04-29 10:21               ` Thomas Gleixner
2014-04-29 10:21                 ` Thomas Gleixner
     [not found]                 ` <alpine.DEB.2.02.1404291217380.6261-3cz04HxQygjZikZi3RtOZ1XZhhPuCNm+@public.gmane.org>
2014-04-30  1:12                   ` Dave Young
2014-04-30  1:12                     ` Dave Young

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