I'm trying to test code paths dealing with fragmented memory, so I'd
like to have a simple way to cause fragmented memory in the kernel. Is
there any API in the kernel that would let me allocate two contiguous
pages, then free one of them?
I tried the following, but it triggers an oops in free_page():
unsigned long addr =
__get_free_pages(GFP_KERNEL|__GFP_NORETRY|__GFP_NOWARN, 1);
if (!addr)
break;
free_page(addr+4096);
Thanks,
Chris
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