From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: "'Thierry Reding'" <thierry.reding@avionic-design.de>,
"'Michal Nazarewicz'" <mina86@mina86.com>,
linux-kernel@vger.kernel.org,
Peter Ujfalusi <peter.ujfalusi@ti.com>
Subject: Re: CMA broken in next-20120926
Date: Thu, 27 Sep 2012 18:49:40 +0100 [thread overview]
Message-ID: <20120927174939.GA5460@sirena.org.uk> (raw)
In-Reply-To: <000601cd9cc9$100428c0$300c7a40$%szyprowski@samsung.com>
On Thu, Sep 27, 2012 at 05:59:19PM +0200, Marek Szyprowski wrote:
> On Thursday, September 27, 2012 1:29 PM Thierry Reding wrote:
> > any idea why CMA might be broken in next-20120926. I see that there
> > haven't been any major changes to CMA itself, but there's been quite a
> > bit of restructuring of various memory allocation bits lately. I wasn't
> > able to track the problem down, though.
> > What I see is this during boot (with CMA_DEBUG enabled):
> > [ 0.266904] cma: dma_alloc_from_contiguous(cma db474f80, count 64, align 6)
> > [ 0.284469] cma: dma_alloc_from_contiguous(): memory range at c09d7000 is busy, retrying
> > [ 0.293648] cma: dma_alloc_from_contiguous(): memory range at c09d7800 is busy, retrying
> > ...
> > [ 2.648619] DMA: failed to allocate 256 KiB pool for atomic coherent allocation
> > ...
> > [ 4.196193] WARNING: at /home/thierry.reding/src/kernel/linux-ipmp.git/arch/arm/mm/dma-
> > mapping.c:485 __alloc_from_pool+0xdc/0x110()
> > [ 4.207988] coherent pool not initialised!
> > So the pool isn't getting initialized properly because CMA can't get at
> > the memory. Do you have any hints as to what might be going on? If it's
> > any help, I started seeing this with next-20120926 and it is in today's
> > next as well.
> Thanks for the report, I will check this issue asap.
Myself and Peter have seen the same thing, though neither of us drilled
down enough to make a sensible report.
next prev parent reply other threads:[~2012-09-27 17:50 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-27 11:29 Thierry Reding
2012-09-27 15:59 ` Marek Szyprowski
2012-09-27 17:49 ` Mark Brown [this message]
2012-09-27 22:11 ` Andrew Morton
2012-09-28 5:43 ` Minchan Kim
2012-09-28 6:10 ` Thierry Reding
2012-09-28 7:44 ` Peter Ujfalusi
2012-09-28 7:56 ` Mel Gorman
2012-09-28 8:09 ` Mel Gorman
2012-09-28 8:37 ` Mel Gorman
2012-09-28 8:48 ` Peter Ujfalusi
2012-09-28 10:27 ` Mel Gorman
2012-09-28 10:32 ` Thierry Reding
2012-09-28 10:38 ` Thierry Reding
2012-09-28 10:51 ` Thierry Reding
2012-09-28 11:07 ` Mel Gorman
2012-09-28 11:39 ` Thierry Reding
2012-09-28 12:43 ` Mel Gorman
2012-10-01 14:24 ` Thierry Reding
2012-10-02 12:48 ` Thierry Reding
2012-10-02 14:41 ` Mel Gorman
2012-10-02 15:03 ` Thierry Reding
2012-10-02 15:12 ` Mel Gorman
2012-10-08 8:06 ` Minchan Kim
2012-10-08 8:48 ` Mel Gorman
2012-10-09 8:40 ` Bartlomiej Zolnierkiewicz
2012-10-09 10:11 ` Mel Gorman
2012-10-09 11:02 ` Thierry Reding
2012-10-09 11:08 ` Bartlomiej Zolnierkiewicz
2012-10-09 11:32 ` Mel Gorman
2012-10-09 11:38 ` Thierry Reding
2012-09-28 10:52 ` Mel Gorman
2012-10-04 14:00 ` [PATCH] mm: compaction: Iron out isolate_freepages_block() and isolate_freepages_range() -fix1 Mel Gorman
2012-10-05 9:59 ` [PATCH] mm: compaction: Iron out isolate_freepages_block() and isolate_freepages_range() -fix2 Mel Gorman
2012-10-08 6:50 ` Minchan Kim
2012-10-08 6:53 ` [PATCH] mm: compaction: Iron out isolate_freepages_block() and isolate_freepages_range() -fix1 Minchan Kim
2012-10-04 14:03 ` [PATCH] mm: compaction: Cache if a pageblock was scanned and no pages were isolated -fix3 Mel Gorman
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