Add support for the Google xxhash checksumming function
It's a lot faster than the other software defined ones, so will
be a useful alternative for the cases where crc32c-intel isn't
available.
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/HOWTO b/HOWTO
index 9830fa1..bafad93 100644
--- a/HOWTO
+++ b/HOWTO
@@ -1105,6 +1105,10 @@
crc7 Use a crc7 sum of the data area and store
it in the header of each block.
+ xxhash Use xxhash as the checksum function. Generally
+ the fastest software checksum that fio
+ supports.
+
sha512 Use sha512 as the checksum function.
sha256 Use sha256 as the checksum function.