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Subject[PATCH] mm: add a nopanic option for low bootmem
This patch adds a no panic option for low bootmem allocs.  This will
allow for a more graceful handling of "out of memory" for those
callers who wish to handle it.

Thanks,
Jon

Signed-off-by: Jon Mason <jdmason@us.ibm.com>

diff -r 307c5ac10c26 include/linux/bootmem.h
--- a/include/linux/bootmem.h Sat Apr 22 12:21:45 2006
+++ b/include/linux/bootmem.h Mon Apr 24 09:59:50 2006
@@ -46,6 +46,7 @@
extern void __init free_bootmem (unsigned long addr, unsigned long size);
extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
extern void * __init __alloc_bootmem_nopanic (unsigned long size, unsigned long align, unsigned long goal);
+extern void * __init __alloc_bootmem_low_nopanic(unsigned long size, unsigned long align, unsigned long goal);
extern void * __init __alloc_bootmem_low(unsigned long size,
unsigned long align,
unsigned long goal);
diff -r 307c5ac10c26 mm/bootmem.c
--- a/mm/bootmem.c Sat Apr 22 12:21:45 2006
+++ b/mm/bootmem.c Mon Apr 24 09:59:50 2006
@@ -463,3 +463,16 @@
{
return __alloc_bootmem_core(pgdat->bdata, size, align, goal, LOW32LIMIT);
}
+
+void * __init __alloc_bootmem_low_nopanic(unsigned long size,
+ unsigned long align, unsigned long goal)
+{
+ bootmem_data_t *bdata;
+ void *ptr;
+
+ list_for_each_entry(bdata, &bdata_list, list)
+ if ((ptr = __alloc_bootmem_core(bdata, size, align, goal,
+ LOW32LIMIT)))
+ return(ptr);
+ return NULL;
+}
-
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