Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [RFC] mm: generic adaptive large memory allocation APIs | Date | Thu, 13 May 2010 13:45:35 +0900 (JST) |
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Hi
> void *kvmalloc(size_t size) > { > void *ptr; > > if (size < PAGE_SIZE) > return kmalloc(PAGE_SIZE, GFP_KERNEL); > ptr = alloc_pages_exact(size, GFP_KERNEL | __GFP_NOWARN);
low order GFP_KERNEL allocation never fail. then, this doesn't works as you expected.
> if (ptr != NULL) > return ptr; > > return vmalloc(size);
On x86, vmalloc area is only 128MB address space. it is very rare resource than physical ram. vmalloc fallback is not good idea.
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