From: Marek Szyprowski <m.szyprowski@samsung.com>
To: 'Ohad Ben-Cohen' <ohad@wizery.com>
Cc: "'Clark, Rob'" <rob@ti.com>,
'Daniel Walker' <dwalker@codeaurora.org>,
'Russell King' <linux@arm.linux.org.uk>,
'Arnd Bergmann' <arnd@arndb.de>,
'Jonathan Corbet' <corbet@lwn.net>, 'Mel Gorman' <mel@csn.ul.ie>,
'Jesse Barker' <jesse.barker@linaro.org>,
linux-kernel@vger.kernel.org,
'Michal Nazarewicz' <mina86@mina86.com>,
'Dave Hansen' <dave@linux.vnet.ibm.com>,
linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org,
'Kyungmin Park' <kyungmin.park@samsung.com>,
'KAMEZAWA Hiroyuki' <kamezawa.hiroyu@jp.fujitsu.com>,
'Andrew Morton' <akpm@linux-foundation.org>,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: RE: [Linaro-mm-sig] [PATCH 12/15] drivers: add Contiguous Memory Allocator
Date: Mon, 30 Jan 2012 08:43:55 +0100 [thread overview]
Message-ID: <014101ccdf22$eb610d30$c2232790$%szyprowski@samsung.com> (raw)
In-Reply-To: <CAK=WgbY3L7u0AC1c=iNvoMXX+LSJoz1W-xb=S6gmhqcse5CKaA@mail.gmail.com>
Hello,
On Saturday, January 28, 2012 7:57 PM Ohad Ben-Cohen wrote:
> On Fri, Jan 27, 2012 at 5:17 PM, Marek Szyprowski
> <m.szyprowski@samsung.com> wrote:
> > There have been some vmalloc layout changes merged to v3.3-rc1.
>
> That was dead-on, thanks a lot!
Did you managed to fix this issue?
>
> I did then bump into a different allocation failure which happened
> because dma_alloc_from_contiguous() computes 'mask' before capping the
> 'align' argument.
>
> The early 'mask' computation was added in v18 (and therefore exists in
> v19 too) and I was actually testing v17 previously, so I didn't notice
> it before.
Right, thanks for spotting it, I will squash it to the next release.
> You may want to squash something like this:
>
> diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
> index f41e699..8455cb7 100644
> --- a/drivers/base/dma-contiguous.c
> +++ b/drivers/base/dma-contiguous.c
> @@ -319,8 +319,7 @@ struct page *dma_alloc_from_contiguous(struct device *dev, i
> unsigned int align)
> {
> struct cma *cma = dev_get_cma_area(dev);
> - unsigned long pfn, pageno, start = 0;
> - unsigned long mask = (1 << align) - 1;
> + unsigned long mask, pfn, pageno, start = 0;
> int ret;
>
> if (!cma || !cma->count)
> @@ -329,6 +328,8 @@ struct page *dma_alloc_from_contiguous(struct device *dev, i
> if (align > CONFIG_CMA_ALIGNMENT)
> align = CONFIG_CMA_ALIGNMENT;
>
> + mask = (1 << align) - 1;
> +
> pr_debug("%s(cma %p, count %d, align %d)\n", __func__, (void *)cma,
> count, align);
>
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
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next prev parent reply other threads:[~2012-01-30 7:44 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-26 9:00 [PATCHv19 00/15] Contiguous Memory Allocator Marek Szyprowski
2012-01-26 9:00 ` [PATCH 01/15] mm: page_alloc: remove trailing whitespace Marek Szyprowski
2012-01-30 10:59 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 02/15] mm: page_alloc: update migrate type of pages on pcp when isolating Marek Szyprowski
2012-01-30 11:15 ` Mel Gorman
2012-01-30 15:41 ` Michal Nazarewicz
2012-01-30 16:14 ` Mel Gorman
2012-01-31 16:23 ` Marek Szyprowski
2012-02-02 12:47 ` Mel Gorman
2012-02-02 19:53 ` Michal Nazarewicz
2012-02-03 9:31 ` Marek Szyprowski
2012-02-03 11:27 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 03/15] mm: compaction: introduce isolate_migratepages_range() Marek Szyprowski
2012-01-30 11:24 ` Mel Gorman
2012-01-30 12:42 ` Michal Nazarewicz
2012-01-30 13:25 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 04/15] mm: compaction: introduce isolate_freepages_range() Marek Szyprowski
2012-01-30 11:48 ` Mel Gorman
2012-01-30 11:55 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 05/15] mm: compaction: export some of the functions Marek Szyprowski
2012-01-30 11:57 ` Mel Gorman
2012-01-30 12:33 ` Michal Nazarewicz
2012-01-26 9:00 ` [PATCH 06/15] mm: page_alloc: introduce alloc_contig_range() Marek Szyprowski
2012-01-30 12:11 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 07/15] mm: page_alloc: change fallbacks array handling Marek Szyprowski
2012-01-30 12:12 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 08/15] mm: mmzone: MIGRATE_CMA migration type added Marek Szyprowski
2012-01-30 12:35 ` Mel Gorman
2012-01-30 13:06 ` Michal Nazarewicz
2012-01-30 14:52 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 09/15] mm: page_isolation: MIGRATE_CMA isolation functions added Marek Szyprowski
2012-01-26 9:00 ` [PATCH 10/15] mm: extract reclaim code from __alloc_pages_direct_reclaim() Marek Szyprowski
2012-01-30 12:42 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 11/15] mm: trigger page reclaim in alloc_contig_range() to stabilize watermarks Marek Szyprowski
2012-01-30 13:05 ` Mel Gorman
2012-01-31 17:15 ` Marek Szyprowski
2012-01-26 9:00 ` [PATCH 12/15] drivers: add Contiguous Memory Allocator Marek Szyprowski
2012-01-27 9:44 ` [Linaro-mm-sig] " Ohad Ben-Cohen
2012-01-27 10:53 ` Marek Szyprowski
2012-01-27 14:27 ` Clark, Rob
2012-01-27 14:51 ` Marek Szyprowski
2012-01-27 14:59 ` Ohad Ben-Cohen
2012-01-27 15:17 ` Marek Szyprowski
2012-01-28 18:57 ` Ohad Ben-Cohen
2012-01-30 7:43 ` Marek Szyprowski [this message]
2012-01-30 9:16 ` Ohad Ben-Cohen
2012-01-27 14:56 ` Ohad Ben-Cohen
2012-01-26 9:00 ` [PATCH 13/15] X86: integrate CMA with DMA-mapping subsystem Marek Szyprowski
2012-01-26 9:00 ` [PATCH 14/15] ARM: " Marek Szyprowski
2012-01-26 9:00 ` [PATCH 15/15] ARM: Samsung: use CMA for 2 memory banks for s5p-mfc device Marek Szyprowski
2012-01-26 15:31 ` [PATCHv19 00/15] Contiguous Memory Allocator Arnd Bergmann
2012-01-26 15:38 ` Michal Nazarewicz
2012-01-26 15:48 ` Marek Szyprowski
2012-01-28 0:26 ` Andrew Morton
2012-01-29 18:09 ` Rob Clark
2012-01-29 20:32 ` Anca Emanuel
2012-01-29 20:51 ` Arnd Bergmann
2012-01-30 13:25 ` Mel Gorman
2012-01-30 15:43 ` Michal Nazarewicz
2012-01-31 17:17 ` Benjamin Gaignard
2012-02-01 8:47 ` Marek Szyprowski
2012-02-10 18:10 ` Marek Szyprowski
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