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Date: Thu, 11 Sep 2008 23:08:47 +0900 From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> To: mingo@...hat.com Cc: linux-kernel@...r.kernel.org, fujita.tomonori@....ntt.co.jp, Alexis Bruemmer <alexisb@...ibm.com>, Muli Ben-Yehuda <muli@...ibm.com> Subject: [PATCH 1/2] x86: avoid unnecessary low zone allocation in Calgary's alloc_coherent x86's common alloc_coherent (dma_alloc_coherent in dma-mapping.h) sets up the gfp flag according to the device dma_mask but Calgary doesn't need it because of virtual mappings. This patch avoids unnecessary low zone allocation. Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> Cc: Alexis Bruemmer <alexisb@...ibm.com> Cc: Muli Ben-Yehuda <muli@...ibm.com> --- arch/x86/kernel/pci-calgary_64.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c index 8415d92..fe7695e 100644 --- a/arch/x86/kernel/pci-calgary_64.c +++ b/arch/x86/kernel/pci-calgary_64.c @@ -491,6 +491,8 @@ static void* calgary_alloc_coherent(struct device *dev, size_t size, npages = size >> PAGE_SHIFT; order = get_order(size); + flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); + /* alloc enough pages (and possibly more) */ ret = (void *)__get_free_pages(flag, order); if (!ret) -- 1.5.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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