Messages in this thread | | | Date | Fri, 1 Jun 2007 22:31:30 +0100 | From | Russell King <> | Subject | Re: dma_alloc_coherent fails |
| |
On Fri, Jun 01, 2007 at 10:16:41PM +0530, Maximus wrote: > Hi, > Am using a linux 2.6.19 kernel for arm. the dma_alloc_coherent > function call in the kernel for 38400 bytes fails. > > Has anyone faced this problem before?. > > What could be make dma_alloc_coherent to success sometimes and fail > sometimes?.
Memory fragmentation. Large allocations (> 1 page) are always unreliable.
-- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: - 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/
| |