On Tue, 20 Nov 2012 15:31:45 +0100 Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> wrote: > dmapool always calls dma_alloc_coherent() with GFP_ATOMIC flag, > regardless the flags provided by the caller. This causes excessive > pruning of emergency memory pools without any good reason. Additionaly, > on ARM architecture any driver which is using dmapools will sooner or > later trigger the following error: > "ERROR: 256 KiB atomic DMA coherent pool is too small! > Please increase it with coherent_pool= kernel parameter!". > Increasing the coherent pool size usually doesn't help much and only > delays such error, because all GFP_ATOMIC DMA allocations are always > served from the special, very limited memory pool. > Is this problem serious enough to justify merging the patch into 3.7? And into -stable kernels? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>