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| author | Pekka Enberg <penberg@cs.helsinki.fi> | 2009-06-12 14:03:06 +0300 |
|---|---|---|
| committer | Pekka Enberg <penberg@cs.helsinki.fi> | 2009-06-12 18:53:33 +0300 |
| commit | 7e85ee0c1d15ca5f8bff0f514f158eba1742dd87 (patch) | |
| tree | 8f9c21f0df6bea88740d7dd48834ac9ffc238e93 /include/linux/gfp.h | |
| parent | eb91f1d0a531289e18f5587dc197d12a251c66a3 (diff) | |
| download | linux-7e85ee0c1d15ca5f8bff0f514f158eba1742dd87.tar.gz linux-7e85ee0c1d15ca5f8bff0f514f158eba1742dd87.tar.bz2 linux-7e85ee0c1d15ca5f8bff0f514f158eba1742dd87.zip | |
slab,slub: don't enable interrupts during early boot
As explained by Benjamin Herrenschmidt:
Oh and btw, your patch alone doesn't fix powerpc, because it's missing
a whole bunch of GFP_KERNEL's in the arch code... You would have to
grep the entire kernel for things that check slab_is_available() and
even then you'll be missing some.
For example, slab_is_available() didn't always exist, and so in the
early days on powerpc, we used a mem_init_done global that is set form
mem_init() (not perfect but works in practice). And we still have code
using that to do the test.
Therefore, mask out __GFP_WAIT, __GFP_IO, and __GFP_FS in the slab allocators
in early boot code to avoid enabling interrupts.
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Diffstat (limited to 'include/linux/gfp.h')
| -rw-r--r-- | include/linux/gfp.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 0bbc15f54536..3760e7c5de02 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -85,6 +85,9 @@ struct vm_area_struct; __GFP_NOWARN|__GFP_REPEAT|__GFP_NOFAIL|\ __GFP_NORETRY|__GFP_NOMEMALLOC) +/* Control slab gfp mask during early boot */ +#define SLAB_GFP_BOOT_MASK __GFP_BITS_MASK & ~(__GFP_WAIT|__GFP_IO|__GFP_FS) + /* Control allocation constraints */ #define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE) |