linux-kernel - Re: [PATCH 04/35] lmb: Add lmb_find

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Date:	Fri, 14 May 2010 18:12:06 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Yinghai <yinghai.lu@...cle.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH 04/35] lmb: Add lmb_find_area()

On Thu, 2010-05-13 at 23:25 -0700, Yinghai wrote:
> >> +u64 __lmb_find_area(u64 ei_start, u64 ei_last, u64 start, u64 end,
> >> +                    u64 size, u64 align);
> >> +u64 lmb_find_area(u64 start, u64 end, u64 size, u64 align);
> > 
> > See my comments about sorting out the return from that function.
> > 
> > Also, I don't understand the need for that __ version. It looks like
> > something you should keep inside x86, I don't see the need for it in
> the
> > generic LMB code, since it just does trivial cropping of the
> arguments.
> 
> otherwise need to export lmb_find_base() and LMB_ERROR

Well, then export lmb_find_base(), and just sanitize the result codes
over all LMB. That's not -that- hard, it's not like there were gazillion
of users yet. I don't have time now to do that myself before monday.

> yes. but need that to keep switch from early_res/nobootmem to
> lmb/nobootmem smooth.
> 
> will clean it after early_res is replaced.

Then make it inline inside the x86 stuff. But really, you should cleanup
that result code. It's something on my TODO list for lmb that I haven't
had a chance to do yet, so please look at that or wait til next week so
I do it myself.

Cheers,
Ben.


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