linux-kernel - Re: [PATCH 2/2] printk: Allocate kernel log buffer earlier v2

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Message-ID: <4D949FCA.70503@sgi.com>
Date:	Thu, 31 Mar 2011 08:37:46 -0700
From:	Mike Travis <travis@....com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Jack Steiner <steiner@....com>, Robin Holt <holt@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 2/2] printk: Allocate kernel log buffer earlier v2



Ingo Molnar wrote:
> * Mike Travis <travis@....com> wrote:
> 
>> Subject: printk: Allocate kernel log buffer earlier v2
>>
>> On larger systems, because of the numerous ACPI, Bootmem and EFI
>> messages, the static log buffer overflows before the larger one
>> specified by the log_buf_len param is allocated.  Minimize the
>> overflow by allocating the new log buffer as soon as possible.
>>
>> The allocation method is passed in as an argument to make
>> backporting to "pre-memblock" kernels easier.
> 
> Hm, all that allocation pointer magic looks a tad too complex and non-obvious.
> 
> Why not just make it as simple and obvious as possible for the current kernel - 
> and we can still mark it -stable and you backport it to the non-memblock 
> kernel? That keeps compatibility complexity out of upstream ...
> 
> Thanks,
> 
> 	Ingo

Sure, I can do that.

THanks,
Mike
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