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| author | Keir Fraser <keir.fraser@citrix.com> | 2010-05-04 12:42:21 +0100 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2010-05-04 12:42:21 +0100 |
| commit | a03bd60cee72d1d7f025398c98130da7a011492e (patch) | |
| tree | a485b55482f7215259a0636bd715c9f0deee3eb7 /xen/include/xen/mm.h | |
| parent | c499509ef2595a5daa8ef804168c94291e90ec48 (diff) | |
| download | xen-a03bd60cee72d1d7f025398c98130da7a011492e.tar.gz xen-a03bd60cee72d1d7f025398c98130da7a011492e.tar.bz2 xen-a03bd60cee72d1d7f025398c98130da7a011492e.zip | |
x86: fix Dom0 booting time regression
Unfortunately the changes in c/s 21035 caused boot time to go up
significantly on certain large systems. To rectify this without going
back to the old behavior, introduce a new memory allocation flag so
that Dom0 allocations can exhaust non-DMA memory before starting to
consume DMA memory. For the latter, the behavior introduced in
aforementioned c/s gets retained, while for the former we can now even
try larger chunks first.
This builds on the fact that alloc_chunk() gets called with non-
increasing 'max_pages' arguments, end hence it can store locally the
allocation order last used (as larger order allocations can't succeed
during subsequent invocations if they failed once).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Diffstat (limited to 'xen/include/xen/mm.h')
| -rw-r--r-- | xen/include/xen/mm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h index 94b4aa2000..612a11c39b 100644 --- a/xen/include/xen/mm.h +++ b/xen/include/xen/mm.h @@ -80,6 +80,8 @@ int assign_pages( #define MEMF_populate_on_demand (1U<<_MEMF_populate_on_demand) #define _MEMF_tmem 2 #define MEMF_tmem (1U<<_MEMF_tmem) +#define _MEMF_no_dma 3 +#define MEMF_no_dma (1U<<_MEMF_no_dma) #define _MEMF_node 8 #define MEMF_node(n) ((((n)+1)&0xff)<<_MEMF_node) #define _MEMF_bits 24 |