[PATCH 0/2] ALSA: memalloc: Fix for Xen PV and non-IOMMU systems

Hi,

this is a patch series to address the recent regression on Xen PV (and possibly non-IOMMU) systems about the SG-buffer memory allocation. We switched to use dma_alloc_noncontiguous() as hoped it handling everything right, but it turned out that this doesn't work always. So this is one step back, use the explicit SG-buffer with dma_alloc_coherent() calls, but in a bit more optimized ways, and also applying only for those systems.

Takashi

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Takashi Iwai (2): ALSA: memalloc: Explicit SG-allocations for Xen PV and non-IOMMU systems ALSA: memalloc: Use coherent DMA allocation for fallback again

sound/core/memalloc.c | 68 +++++++++++++++++++++++++++++++++---------- 1 file changed, 53 insertions(+), 15 deletions(-)