Messages in this thread Patch in this message | | | Date | Fri, 22 Jun 2007 13:15:19 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: Oops in a driver while using SLUB as a SLAB allocator |
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Here is the corresponding PA-RISC piece. Its as straightforward as the other one since the only way to make this work properly in the past was if the sizes passed to the dma alloc functions are page size based.
PA-RISC: Use page allocator instead of slab allocator.
Slab pages obtained via kmalloc are not cachline aligned. Nor is it advisable to perform VM operations designed for page allocator pages on memory obtained via kmalloc.
So replace the page sized allocations in kernel/pci-dma.c with page allocator pages.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
--- arch/parisc/kernel/pci-dma.c | 4 ++-- include/linux/mm.h | 5 +---- 2 files changed, 3 insertions(+), 6 deletions(-)
Index: linux-2.6/arch/parisc/kernel/pci-dma.c =================================================================== --- linux-2.6.orig/arch/parisc/kernel/pci-dma.c 2007-06-22 13:02:32.000000000 -0700 +++ linux-2.6/arch/parisc/kernel/pci-dma.c 2007-06-22 13:06:39.000000000 -0700 @@ -572,7 +572,7 @@ static void *pa11_dma_alloc_noncoherent( void *addr = NULL; /* rely on kmalloc to be cacheline aligned */ - addr = kmalloc(size, flag); + addr = (void *)__get_free_pages(flag, get_order(size)); if(addr) *dma_handle = (dma_addr_t)virt_to_phys(addr); @@ -582,7 +582,7 @@ static void *pa11_dma_alloc_noncoherent( static void pa11_dma_free_noncoherent(struct device *dev, size_t size, void *vaddr, dma_addr_t iova) { - kfree(vaddr); + free_pages((unsigned long)vaddr, get_order(size)); return; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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