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From: dave@linux.vnet.ibm.com (Dave Hansen)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/9] mm: alloc_contig_freed_pages() added
Date: Tue, 18 Oct 2011 10:48:46 -0700	[thread overview]
Message-ID: <1318960126.4465.249.camel@nimitz> (raw)
In-Reply-To: <op.v3j5ent03l0zgt@mpn-glaptop>

On Tue, 2011-10-18 at 10:26 -0700, Michal Nazarewicz wrote:
> > You can do this in a more general fashion by checking the
> > zone boundaries and resolving the pfn->page every MAX_ORDER_NR_PAGES.
> > That will not be SPARSEMEM specific.
> 
> I've tried doing stuff that way but it ended up with much more code.

I guess instead of:

>> +static inline bool zone_pfn_same_memmap(unsigned long pfn1, unsigned long pfn2)
>> +{
>> +    return pfn_to_section_nr(pfn1) == pfn_to_section_nr(pfn2);
>> +}

You could do:

static inline bool zone_pfn_same_maxorder(unsigned long pfn1, unsigned long pfn2)
{
	unsigned long mask = MAX_ORDER_NR_PAGES-1;
	return (pfn1 & mask) == (pfn2 & mask);
}

I think that works.  Should be the same code you have now, basically.

-- Dave

  reply	other threads:[~2011-10-18 17:48 UTC|newest]

Thread overview: 61+ 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 [this message]
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
2011-11-01 15:04       ` Mel Gorman
2011-11-01 18:06         ` Michal Nazarewicz
2011-11-01 18:47           ` Mel Gorman
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
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
  -- strict thread matches above, loose matches on Subject: below --
2011-08-12 10:58 [PATCHv14 0/9] Contiguous Memory Allocator Marek Szyprowski
2011-08-12 10:58 ` [PATCH 2/9] mm: alloc_contig_freed_pages() added Marek Szyprowski

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