From: Andrew Morton <akpm@linux-foundation.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org, linux-mm@kvack.org,
linaro-mm-sig@lists.linaro.org,
Michal Nazarewicz <mina86@mina86.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Russell King <linux@arm.linux.org.uk>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Ankita Garg <ankita@in.ibm.com>,
Daniel Walker <dwalker@codeaurora.org>,
Mel Gorman <mel@csn.ul.ie>,
Jesse Barker <jesse.barker@linaro.org>,
Jonathan Corbet <corbet@lwn.net>,
Shariq Hasnain <shariq.hasnain@linaro.org>,
Chunsang Jeong <chunsang.jeong@linaro.org>,
Dave Hansen <dave@linux.vnet.ibm.com>
Subject: Re: [PATCHv16 0/9] Contiguous Memory Allocator
Date: Mon, 10 Oct 2011 15:56:42 -0700 [thread overview]
Message-ID: <20111010155642.38df59af.akpm@linux-foundation.org> (raw)
In-Reply-To: <201110071827.06366.arnd@arndb.de>
On Fri, 7 Oct 2011 18:27:06 +0200
Arnd Bergmann <arnd@arndb.de> wrote:
> On Thursday 06 October 2011, Marek Szyprowski wrote:
> > Once again I decided to post an updated version of the Contiguous Memory
> > Allocator patches.
> >
> > This version provides mainly a bugfix for a very rare issue that might
> > have changed migration type of the CMA page blocks resulting in dropping
> > CMA features from the affected page block and causing memory allocation
> > to fail. Also the issue reported by Dave Hansen has been fixed.
> >
> > This version also introduces basic support for x86 architecture, what
> > allows wide testing on KVM/QEMU emulators and all common x86 boxes. I
> > hope this will result in wider testing, comments and easier merging to
> > mainline.
>
> Hi Marek,
>
> I think we need to finally get this into linux-next now, to get some
> broader testing. Having the x86 patch definitely helps here becauses
> it potentially exposes the code to many more testers.
>
> IMHO it would be good to merge the entire series into 3.2, since
> the ARM portion fixes an important bug (double mapping of memory
> ranges with conflicting attributes) that we've lived with for far
> too long, but it really depends on how everyone sees the risk
> for regressions here. If something breaks in unfixable ways before
> the 3.2 release, we can always revert the patches and have another
> try later.
>
> It's also not clear how we should merge it. Ideally the first bunch
> would go through linux-mm, and the architecture specific patches
> through the respective architecture trees, but there is an obvious
> inderdependency between these sets.
>
> Russell, Andrew, are you both comfortable with putting the entire
> set into linux-mm to solve this? Do you see this as 3.2 or rather
> as 3.3 material?
>
Russell's going to hate me, but...
I do know that he had substantial objections to at least earlier
versions of this, and he is a guy who knows of what he speaks.
So I would want to get a nod from rmk on this work before proceeding.
If that nod isn't available then let's please identify the issues and
see what we can do about them.
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next prev parent reply other threads:[~2011-10-10 22:56 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-06 13:54 [PATCHv16 0/9] Contiguous Memory Allocator Marek Szyprowski
2011-10-06 13:54 ` [PATCH 1/9] mm: move some functions from memory_hotplug.c to page_isolation.c Marek Szyprowski
2011-10-14 23:23 ` Andrew Morton
2011-10-18 12:05 ` Mel Gorman
2011-10-06 13:54 ` [PATCH 2/9] mm: alloc_contig_freed_pages() added Marek Szyprowski
2011-10-14 23:29 ` Andrew Morton
2011-10-16 8:01 ` Michal Nazarewicz
2011-10-16 8:31 ` Andrew Morton
2011-10-16 9:39 ` Michal Nazarewicz
2011-10-17 12:21 ` Marek Szyprowski
2011-10-17 18:39 ` Andrew Morton
2011-10-18 12:21 ` Mel Gorman
2011-10-18 17:26 ` Michal Nazarewicz
2011-10-18 17:48 ` Dave Hansen
2011-10-18 18:00 ` Michal Nazarewicz
2011-10-21 10:06 ` Mel Gorman
2011-10-24 1:00 ` Michal Nazarewicz
2011-10-24 4:05 ` Michal Nazarewicz
2011-10-24 4:05 ` Michal Nazarewicz
2011-11-01 15:04 ` Mel Gorman
2011-11-01 18:06 ` Michal Nazarewicz
2011-11-01 18:47 ` Mel Gorman
2011-10-24 4:05 ` Michal Nazarewicz
2011-10-24 4:05 ` Michal Nazarewicz
2011-10-06 13:54 ` [PATCH 3/9] mm: alloc_contig_range() added Marek Szyprowski
2011-10-14 23:35 ` Andrew Morton
2011-10-18 12:38 ` Mel Gorman
2011-10-06 13:54 ` [PATCH 4/9] mm: MIGRATE_CMA migration type added Marek Szyprowski
2011-10-14 23:38 ` Andrew Morton
2011-10-18 13:08 ` Mel Gorman
2011-10-24 19:32 ` Michal Nazarewicz
2011-10-27 9:10 ` Michal Nazarewicz
2011-10-06 13:54 ` [PATCH 5/9] mm: MIGRATE_CMA isolation functions added Marek Szyprowski
2011-10-06 13:54 ` [PATCH 6/9] drivers: add Contiguous Memory Allocator Marek Szyprowski
2011-10-14 23:57 ` Andrew Morton
2011-10-16 10:08 ` Russell King - ARM Linux
2011-10-18 13:43 ` Mel Gorman
2011-10-24 19:39 ` Michal Nazarewicz
2011-11-04 10:41 ` Marek Szyprowski
2011-10-06 13:54 ` [PATCH 7/7] ARM: integrate CMA with DMA-mapping subsystem Marek Szyprowski
2011-10-06 14:18 ` Marek Szyprowski
2011-10-15 0:03 ` Andrew Morton
2011-10-06 13:54 ` [PATCH 7/9] X86: " Marek Szyprowski
2011-10-06 13:54 ` [PATCH 8/9] ARM: " Marek Szyprowski
2011-10-14 4:33 ` [Linaro-mm-sig] " Subash Patel
2011-10-14 9:14 ` Marek Szyprowski
2011-10-06 13:54 ` [PATCH 9/9] ARM: Samsung: use CMA for 2 memory banks for s5p-mfc device Marek Szyprowski
2011-10-07 16:27 ` [PATCHv16 0/9] Contiguous Memory Allocator Arnd Bergmann
2011-10-10 6:58 ` [Linaro-mm-sig] " Ohad Ben-Cohen
2011-10-10 12:02 ` Clark, Rob
2011-10-10 22:56 ` Andrew Morton [this message]
2011-10-11 6:57 ` Marek Szyprowski
2011-10-11 13:52 ` Arnd Bergmann
2011-10-14 23:19 ` Andrew Morton
2011-10-15 14:24 ` Arnd Bergmann
2011-10-10 12:07 ` [Linaro-mm-sig] " Maxime Coquelin
2011-10-11 7:17 ` Marek Szyprowski
2011-10-11 7:30 ` Maxime Coquelin
2011-10-11 10:50 ` Marek Szyprowski
2011-10-11 11:25 ` Maxime Coquelin
2011-10-11 13:05 ` Marek Szyprowski
2011-10-12 11:08 ` [PATCH] fixup: mm: alloc_contig_range: increase min_free_kbytes during allocation Marek Szyprowski
2011-10-12 13:01 ` Maxime Coquelin
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