From: Joerg Roedel <joerg.roedel@amd.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>, Tejun Heo <tj@kernel.org>,
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
linux-kernel@vger.kernel.org, chrisw@sous-sol.org,
dwmw2@infradead.org, Andrew Morton <akpm@linux-foundation.org>,
Yinghai Lu <yinghai@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Vegard Nossum <vegard.nossum@gmail.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>, Mel Gorman <mel@csn.ul.ie>
Subject: Re: [PATCH 07/10] bootmem: add free_bootmem_late
Date: Mon, 16 Nov 2009 11:27:14 +0100 [thread overview]
Message-ID: <20091116102714.GC3328@amd.com> (raw)
In-Reply-To: <20091108095719.GC2845@elte.hu>
On Sun, Nov 08, 2009 at 10:57:19AM +0100, Ingo Molnar wrote:
> Page tables is the main dependency. x86 boots with a limited set of page
> tables, the real ones are set up later.
>
> We'd need to see what bootmem allocations are done before page table
> init in practice. I think i did such tests a few years ago and i think
> it's rather limited (if it happens at all).
>
> If that's mapped out we can just convert x86 to an 'emulated' bootmem
> allocator: buddy and slab is set up right when pagetables are set up,
> and bootmem can just use kmalloc.
That sounds like a good idea. But keep in mind that support for 1GB
pages currently depends on the bootmem allocator because the buddy
system can not allocate 1GB of physically contiguous memory.
But I think this could also be handled from x86 arch code without the
bootmem allocator.
Joerg
next prev parent reply other threads:[~2009-11-16 10:27 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-28 6:47 [PATCH 0/10] x86: handle HW IOMMU initialization failure gracely FUJITA Tomonori
2009-10-28 6:47 ` [PATCH 01/10] Add iommu_init to x86_init_ops FUJITA Tomonori
2009-11-09 20:02 ` Pekka Enberg
2009-11-09 20:11 ` FUJITA Tomonori
2009-11-10 4:45 ` Ingo Molnar
2009-10-28 6:47 ` [PATCH 02/10] Calgary: convert detect_calgary to use iommu_init hook FUJITA Tomonori
2009-10-28 13:38 ` Muli Ben-Yehuda
2009-10-28 6:47 ` [PATCH 03/10] GART: convert gart_iommu_hole_init " FUJITA Tomonori
2009-10-28 6:47 ` [PATCH 04/10] amd_iommu: convert amd_iommu_detect " FUJITA Tomonori
2009-10-28 6:47 ` [PATCH 05/10] intel-iommu: convert detect_intel_iommu " FUJITA Tomonori
2009-10-28 6:47 ` [PATCH 06/10] bootmem: refactor free_all_bootmem_core FUJITA Tomonori
2009-10-28 7:34 ` Ingo Molnar
2009-10-28 7:36 ` Ingo Molnar
2009-10-28 6:47 ` [PATCH 07/10] bootmem: add free_bootmem_late FUJITA Tomonori
2009-10-28 7:48 ` Ingo Molnar
2009-10-28 8:00 ` Tejun Heo
2009-10-28 11:38 ` Pekka Enberg
2009-10-28 12:12 ` Tejun Heo
2009-10-29 11:19 ` Pekka Enberg
2009-11-08 9:57 ` Ingo Molnar
2009-11-16 10:27 ` Joerg Roedel [this message]
2009-11-06 1:50 ` FUJITA Tomonori
2009-11-08 10:00 ` Ingo Molnar
2009-11-09 19:22 ` FUJITA Tomonori
2009-11-09 20:13 ` Pekka Enberg
2009-11-09 20:21 ` Pekka Enberg
2009-11-09 21:47 ` FUJITA Tomonori
2009-11-10 8:05 ` Pekka Enberg
2009-11-13 21:11 ` Chris Wright
2009-10-28 6:47 ` [PATCH 08/10] swiotlb: add swiotlb_free function FUJITA Tomonori
2009-10-28 6:47 ` [PATCH 09/10] swiotlb: export swiotlb_print_info FUJITA Tomonori
2009-10-28 6:47 ` [PATCH 10/10] x86: handle HW IOMMU initialization failure gracely FUJITA Tomonori
2009-10-28 13:21 ` [PATCH 0/10] " Joerg Roedel
2009-10-29 8:27 ` FUJITA Tomonori
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