linux-kernel - Re: [PATCH 07/10] bootmem: add free_bootmem

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Message-ID: <20091108100029.GD2845@elte.hu>
Date:	Sun, 8 Nov 2009 11:00:29 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	linux-kernel@...r.kernel.org, chrisw@...s-sol.org,
	dwmw2@...radead.org, joerg.roedel@....com,
	akpm@...ux-foundation.org, yinghai@...nel.org,
	torvalds@...ux-foundation.org, tj@...nel.org,
	a.p.zijlstra@...llo.nl, penberg@...helsinki.fi,
	vegard.nossum@...il.com, hpa@...or.com, tglx@...utronix.de
Subject: Re: [PATCH 07/10] bootmem: add free_bootmem_late


* FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> wrote:

> On Wed, 28 Oct 2009 08:48:32 +0100
> Ingo Molnar <mingo@...e.hu> wrote:
> 
> > 
> > * FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> wrote:
> > 
> > > From: Chris Wright <chrisw@...s-sol.org>
> > > 
> > > Add a new function for freeing bootmem after the bootmem allocator has
> > > been released and the unreserved pages given to the page allocator.
> > > This allows us to reserve bootmem and then release it if we later
> > > discover it was not needed.
> > > 
> > > Reviewed-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
> > > Signed-off-by: Chris Wright <chrisw@...s-sol.org>
> > > ---
> > >  include/linux/bootmem.h |    1 +
> > >  mm/bootmem.c            |   43 ++++++++++++++++++++++++++++++++++++++-----
> > >  2 files changed, 39 insertions(+), 5 deletions(-)
> > 
> > Hm, we are now further complicating the bootmem model.
> 
> Yeah, agreed. But reorganizing the allocator during boot is not easy. 
> I'll investigate it later on but VT-d people want to fix this IOMMU 
> issue now. Can we accept this for now?

Since the patchset weighs heavily towards the iommu and x86 side i can 
do that in tip:core/iommu tree, if there's an Acked-by for this 
bootmem.c patch from at least one of these gents:

 Johannes Weiner <hannes@...xchg.org>
 Pekka Enberg <penberg@...helsinki.fi>
 Andrew Morton <akpm@...ux-foundation.org>
 Tejun Heo <tj@...nel.org>

Thanks,

	Ingo
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