13 Jul, 2007
1 commit
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This patch updates some of the documentation about DMA buffer management
for USB, and ways to avoid extra copying. Our understanding of the issues
has improved over time.- Most drivers should *avoid* the dma-coherent allocators. There are
a few exceptions (like the HID driver).- Some methods are currently commented out; it seems folk writing
USB drivers aren't doing performance tuning at that level yet.- Just avoid highmem; there's no good way to pass an "I can do highmem
DMA" capability through a driver stack. This is easy, everything
already avoids highmem. But it'd be nice if x86_32 systems with much
physical memory could use it directly with network adapters and mass
storage devices. (Patch, anyone?)Signed-off-by: David Brownell
Signed-off-by: Greg Kroah-Hartman
17 Apr, 2005
1 commit
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.Let it rip!
