>>-----Original Message-----
>>From: [email protected] [mailto:[email protected]] On Behalf Of Zou Nan hai
>>Sent: 2006年3月2日 12:33
>>
>>Really, then how about the following patch?
>>
>>Let normal bootmem allocator go above 4G first.
>>This will save more memory with address less than 4G.
>>
>>Signed-off-by: Zou Nan hai <[email protected]>
>>
>>--- linux-2.6.16-rc5/mm/bootmem.c 2006-03-03 08:31:52.000000000 +0800
>>+++ b/mm/bootmem.c 2006-03-03 09:05:17.000000000 +0800
>>@@ -381,16 +381,24 @@ unsigned long __init free_all_bootmem (v
>> return(free_all_bootmem_core(NODE_DATA(0)));
>> }
>>
>>+#define LOW32LIMIT 0xffffffff
>>+
>> void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal)
>> {
>> pg_data_t *pgdat = pgdat_list;
>> void *ptr;
>>
>>+ if (goal < LOW32LIMIT) {
On i386, above is always true.
>>+ for_each_pgdat(pgdat)
>>+ if ((ptr = __alloc_bootmem_core(pgdat->bdata, size,
>>+ align, LOW32LIMIT, 0)))
>>+ return(ptr);
>>+ }
-
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