From: David Miller <davem@xxxxxxxxxxxxx>
Date: Tue, 09 Jun 2015 00:34:14 -0700 (PDT)
> Your test is faulty.
>
> You cannot use ASI_BLK_P loads or stores without appropriate memory
> barriers around them.
>
> The rules for when and where you need the memory barriers are
> complicated, especially if you want to incur the cost of the memory
> barrier as infrequently as possible.
FWIW, you're probably hitting the bug fixed by the following commit in
glibc:
commit 834caf06f33d79be54cff63c274fba2845513593
Author: Jose E. Marchesi <jose.marchesi@xxxxxxxxxx>
Date: Sat May 17 11:20:27 2014 -0700
Fix sparc memcpy data corruption when using niagara2 optimized routines.
* sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S: Add missing
membar to avoid block loads/stores to overlap previous stores.
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