Re: [RFC 3/3] mm: iommu: The Virtual Contiguous Memory Manager

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> Why video4linux can't use the DMA API? Doing DMA with vmalloc'ed
> buffers is a thing that we should avoid (there are some exceptions
> like xfs though).

Vmalloc is about the only API for creating virtually linear memory areas.
The video stuff really needs that to avoid lots of horrible special cases
when doing buffer processing and the like.

Pretty much each driver using it has a pair of functions 'rvmalloc' and
'rvfree' so given a proper "vmalloc_for_dma()" type interface can easily
be switched

Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux