Hello all, I'm using CMA to malloc contiguous memory, and I have following failure: __alloc_contig_migrate_range: test_pages_isolated(3bc00, 3c000) failed I try to dump_page, it shows: page:81778620 count:1 mapcount:0 mapping: (null) index:0x88b page flags: 0x40000000() since I am not familiar with mm, can someone give me some hint on this failure? 于 2012年04月03日 22:10, Marek Szyprowski 写道: > Hi, > > This is (yet another) update of CMA patches. I've rebased them onto > recent v3.4-rc1 kernel tree and integrated some minor bugfixes. The > first issue has been pointed by Sandeep Patil - alloc_contig_range > reclaimed two times too many pages, second issue (possible mismatch > between pageblock size and MAX_ORDER pages) has been recently spotted > by Michal Nazarewicz. > > These patches are also available on my git repository: > git://git.linaro.org/people/mszyprowski/linux-dma-mapping.git 3.4-rc1-cma-v24 > > Best regards > Marek Szyprowski > Samsung Poland R&D Center > > Links to previous versions of the patchset: > v23: <http://www.spinics.net/lists/linux-media/msg44547.html> > v22: <http://www.spinics.net/lists/linux-media/msg44370.html> > v21: <http://www.spinics.net/lists/linux-media/msg44155.html> > v20: <http://www.spinics.net/lists/linux-mm/msg29145.html> > v19: <http://www.spinics.net/lists/linux-mm/msg29145.html> > v18: <http://www.spinics.net/lists/linux-mm/msg28125.html> > v17: <http://www.spinics.net/lists/arm-kernel/msg148499.html> > v16: <http://www.spinics.net/lists/linux-mm/msg25066.html> > v15: <http://www.spinics.net/lists/linux-mm/msg23365.html> > v14: <http://www.spinics.net/lists/linux-media/msg36536.html> > v13: (internal, intentionally not released) > v12: <http://www.spinics.net/lists/linux-media/msg35674.html> > v11: <http://www.spinics.net/lists/linux-mm/msg21868.html> > v10: <http://www.spinics.net/lists/linux-mm/msg20761.html> > v9: <http://article.gmane.org/gmane.linux.kernel.mm/60787> > v8: <http://article.gmane.org/gmane.linux.kernel.mm/56855> > v7: <http://article.gmane.org/gmane.linux.kernel.mm/55626> > v6: <http://article.gmane.org/gmane.linux.kernel.mm/55626> > v5: (intentionally left out as CMA v5 was identical to CMA v4) > v4: <http://article.gmane.org/gmane.linux.kernel.mm/52010> > v3: <http://article.gmane.org/gmane.linux.kernel.mm/51573> > v2: <http://article.gmane.org/gmane.linux.kernel.mm/50986> > v1: <http://article.gmane.org/gmane.linux.kernel.mm/50669> > > > Changelog: > > v24: > 1. fixed handling of diffrent sizes of pageblock and MAX_ORDER size > pages > > 2. fixed number of the reclaimed pages before performing the allocation > (thanks to Sandeep Patil for pointing this issue) > > 3. rebased onto Linux v3.4-rc1 > > v23: > 1. fixed bug spotted by Aaro Koskinen (incorrect check inside VM_BUG_ON) > > 2. rebased onto next-20120222 tree from > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > > v22: > 1. Fixed compilation break caused by missing fixup patch in v21 > > 2. Fixed typos in the comments > > 3. Removed superfluous #include entries > > v21: > 1. Fixed incorrect check which broke memory compaction code > > 2. Fixed hacky and racy min_free_kbytes handling > > 3. Added serialization patch to watermark calculation > > 4. Fixed typos here and there in the comments > > v20 and earlier - see previous patchsets. > > > Patches in this patchset: > > Marek Szyprowski (6): > mm: extract reclaim code from __alloc_pages_direct_reclaim() > mm: trigger page reclaim in alloc_contig_range() to stabilise > watermarks > drivers: add Contiguous Memory Allocator > X86: integrate CMA with DMA-mapping subsystem > ARM: integrate CMA with DMA-mapping subsystem > ARM: Samsung: use CMA for 2 memory banks for s5p-mfc device > > Mel Gorman (1): > mm: Serialize access to min_free_kbytes > > Michal Nazarewicz (9): > mm: page_alloc: remove trailing whitespace > mm: compaction: introduce isolate_migratepages_range() > mm: compaction: introduce map_pages() > mm: compaction: introduce isolate_freepages_range() > mm: compaction: export some of the functions > mm: page_alloc: introduce alloc_contig_range() > mm: page_alloc: change fallbacks array handling > mm: mmzone: MIGRATE_CMA migration type added > mm: page_isolation: MIGRATE_CMA isolation functions added > > Documentation/kernel-parameters.txt | 9 + > arch/Kconfig | 3 + > arch/arm/Kconfig | 2 + > arch/arm/include/asm/dma-contiguous.h | 15 ++ > arch/arm/include/asm/mach/map.h | 1 + > arch/arm/kernel/setup.c | 9 +- > arch/arm/mm/dma-mapping.c | 370 ++++++++++++++++++++++++------ > arch/arm/mm/init.c | 23 ++- > arch/arm/mm/mm.h | 3 + > arch/arm/mm/mmu.c | 31 ++- > arch/arm/plat-s5p/dev-mfc.c | 51 +---- > arch/x86/Kconfig | 1 + > arch/x86/include/asm/dma-contiguous.h | 13 + > arch/x86/include/asm/dma-mapping.h | 4 + > arch/x86/kernel/pci-dma.c | 18 ++- > arch/x86/kernel/pci-nommu.c | 8 +- > arch/x86/kernel/setup.c | 2 + > drivers/base/Kconfig | 89 +++++++ > drivers/base/Makefile | 1 + > drivers/base/dma-contiguous.c | 401 +++++++++++++++++++++++++++++++ > include/asm-generic/dma-contiguous.h | 28 +++ > include/linux/device.h | 4 + > include/linux/dma-contiguous.h | 110 +++++++++ > include/linux/gfp.h | 12 + > include/linux/mmzone.h | 47 +++- > include/linux/page-isolation.h | 18 +- > mm/Kconfig | 2 +- > mm/Makefile | 3 +- > mm/compaction.c | 418 +++++++++++++++++++++------------ > mm/internal.h | 33 +++ > mm/memory-failure.c | 2 +- > mm/memory_hotplug.c | 6 +- > mm/page_alloc.c | 409 ++++++++++++++++++++++++++++---- > mm/page_isolation.c | 15 +- > mm/vmstat.c | 3 + > 35 files changed, 1791 insertions(+), 373 deletions(-) > create mode 100644 arch/arm/include/asm/dma-contiguous.h > create mode 100644 arch/x86/include/asm/dma-contiguous.h > create mode 100644 drivers/base/dma-contiguous.c > create mode 100644 include/asm-generic/dma-contiguous.h > create mode 100644 include/linux/dma-contiguous.h > -- B.R Cary Zou -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
