[CRIU] [PATCH v3 12/12] test: add test for anon shmem dedup

[Laurent Dufour]

On 07/08/2016 15:11, Eugene Batalov wrote:
> Main test features:
> - Non trivial ps tree with non trivial anon shmem regions
>   (no such test exists now).
> - Each ps tree process continuously writes parts of anon shmem
>   vmas and validates these writes after restore
>   (required for dedup testing).
> - Checking simultaneous changing of anon shmem contents in different
>   processes.
> 
> Signed-off-by: Eugene Batalov <eabatalov89 at gmail.com>


This test is not working at all on PowerPC, because the PAGE_SIZE is 64k
by default, and the test is not using the same magnitude when dealing
with the memory area's size and when dealing with this size.

In the test, MEM_PERIOD is defined based on PAGE_SIZE, while the size of
the memory area are define based on 1UL arbitrary shift.

On PowerPC this leads to a core dump of the test in proc13_func()
because mem2_size become negative !

I tried to fix that by applying the attached patched but the size of the
manage memory areas become very large on PowerPC, about 60G of memory
allocated for this test.

Could you please review this test to manage the memory area size's order
using PAGE_SIZE ?

Thanks,
Laurent.


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