when code, must the buffer be aligned with 64? about isa-l

[gbtucker]

We have eliminated most of the alignment restrictions in various units but a few remain in raid functions. The documentation will list any necessary alignment restrictions on input buffers.

[liujiangang01]

In file of erasure_code_test.c, I see the example which allocate buffer align，if not align,can it work well? if not,why must be align?

[gbtucker]

In this unit test we explicitly align so that we can explicitly test the unaligned cases also by shifting buffers up to a page border and running with efence. Malloc will normally align anyway but this will help so that efence_buffer = buffer + buffer_len - test_size will push up against a page boundary and help us test against readover. In your user code, alignment is not a requirement and it should work will without.