1. 19 May, 2009 1 commit
    • Jesse Barnes's avatar
      drm/i915: allocate large pointer arrays with vmalloc · 8e7d2b2c
      Jesse Barnes authored
      For awhile now, many of the GEM code paths have allocated page or
      object arrays with the slab allocator.  This is nice and fast, but
      won't work well if memory is fragmented, since the slab allocator works
      with physically contiguous memory (i.e. order > 2 allocations are
      likely to fail fairly early after booting and doing some work).
      
      This patch works around the issue by falling back to vmalloc for
      >PAGE_SIZE allocations.  This is ugly, but much less work than chaining
      a bunch of pages together by hand (suprisingly there's not a bunch of
      generic kernel helpers for this yet afaik).  vmalloc space is somewhat
      precious on 32 bit kernels, but our allocations shouldn't be big enough
      to cause problems, though they're routinely more than a page.
      
      Note that this patch doesn't address the unchecked
      alloc-based-on-ioctl-args in GEM; that needs to be fixed in a separate
      patch.
      
      Also, I've deliberately ignored the DRM's "area" junk.  I don't think
      anyone actually uses it anymore and I'm hoping it gets ripped out soon.
      
      [Updated: removed size arg to new free function.  We could unify the
      free functions as well once the DRM mem tracking is ripped out.]
      
      fd.o bug #20152 (part 1/3)
      Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
      Signed-off-by: default avatarEric Anholt <eric@anholt.net>
      8e7d2b2c
  2. 16 May, 2009 1 commit
  3. 15 May, 2009 38 commits