On 10/15/2015 09:16 PM, Anshuman Khandual wrote:
> This adds two tests for memory page migration. One for normal page
> migration which works for both 4K or 64K base page size kernel and
> the other one is for 16MB huge page migration which will work both
> 4K or 64K base page sized 16MB huge pages as and when we support
> huge page migration.
>
> Signed-off-by: Anshuman Khandual <khand...@linux.vnet.ibm.com>
> ---
> - Works for normal page migration on both 64K and 4K base pages
> - Works for 16MB huge page migration (64K) on Aneesh's V2 PTE changes
>
> +
> +int test_migration(unsigned long length)
> +{
> + unsigned long failed;
> + void *addr;
> + int ret;
> +
> + addr = mmap(MMAP_ADDR, length, MMAP_PROT, MMAP_FLAGS, -1, 0);
> + if (addr == MAP_FAILED) {
> + perror("mmap() failed");
> + exit(-1);
> + }
Will add a mlock() call here as well. Some times soft offline
fails while trying to move a huge chunk of memory on a system
because of swapping. With a mlock() in there the problem gets
resolved.
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