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authorDavid S. Miller <davem@davemloft.net>2008-03-24 20:50:48 +1100
committerPaul Mackerras <paulus@samba.org>2008-04-15 21:22:17 +1000
commitc50f68c8aea421267ba7995b1c485c281b28add6 (patch)
tree38d72f3d6c9e43a4653cc7e330af0aa0dfca3dd5 /include/linux/lmb.h
parent4b1d99b37f608b8cc03550033b16212ca9362efd (diff)
downloadop-kernel-dev-c50f68c8aea421267ba7995b1c485c281b28add6.zip
op-kernel-dev-c50f68c8aea421267ba7995b1c485c281b28add6.tar.gz
[LMB] Add lmb_alloc_nid()
A variant of lmb_alloc() that tries to allocate memory on a specified NUMA node 'nid' but falls back to normal lmb_alloc() if that fails. The caller provides a 'nid_range' function pointer which assists the allocator. It is given args 'start', 'end', and pointer to integer 'this_nid'. It places at 'this_nid' the NUMA node id that corresponds to 'start', and returns the end address within 'start' to 'end' at which memory assosciated with 'nid' ends. This callback allows a platform to use lmb_alloc_nid() in just about any context, even ones in which early_pfn_to_nid() might not be working yet. This function will be used by the NUMA setup code on sparc64, and also it can be used by powerpc, replacing it's hand crafted "careful_allocation()" function in arch/powerpc/mm/numa.c If x86 ever converts it's NUMA support over to using the LMB helpers, it can use this too as it has something entirely similar. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/linux/lmb.h')
-rw-r--r--include/linux/lmb.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index 632717c..271153d 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -42,6 +42,8 @@ extern void __init lmb_init(void);
extern void __init lmb_analyze(void);
extern long __init lmb_add(u64 base, u64 size);
extern long __init lmb_reserve(u64 base, u64 size);
+extern u64 __init lmb_alloc_nid(u64 size, u64 align, int nid,
+ u64 (*nid_range)(u64, u64, int *));
extern u64 __init lmb_alloc(u64 size, u64 align);
extern u64 __init lmb_alloc_base(u64 size,
u64, u64 max_addr);
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