ahci-test: improve rw buffer patterns
My pattern was cyclical every 256 bytes, so it missed a fairly obvious failure case. Add some rand() pepper into the test pattern, and for large patterns that exceed 256 sectors, start writing an ID per-sector so that we never generate identical sector patterns. Signed-off-by:John Snow <jsnow@redhat.com> Reviewed-by:
Stefan Hajnoczi <stefanha@redhat.com> Tested-by:
Andreas Färber <afaerber@suse.de> Message-id: 1426811056-2202-5-git-send-email-jsnow@redhat.com
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