HOWTO: note that crc32c will automatically use hw

- Add note that crc32c checksumming will automatically use hardware
  acceleration if possible.
- Add note that crc32c-intel is just a synonym for crc32c.

Signed-off-by: Sitsofe Wheeler <sitsofe@yahoo.com>

diff --git a/HOWTO b/HOWTO
index 7dc08e26feb129f54615802394bf5a36ac6fb0ac..2007dc04422a07c50008f332a68788aff57e98ad 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -2373,13 +2373,14 @@ Verification
                        header of each block.
 
                **crc32c**
-                       Use a crc32c sum of the data area and store it in the header of each
-                       block.
+                       Use a crc32c sum of the data area and store it in the header of
+                       each block. This will automatically use hardware acceleration
+                       (e.g. SSE4.2 on an x86 or CRC crypto extensions on ARM64) but will
+                       fall back to software crc32c if none is found. Generally the
+                       fatest checksum fio supports when hardware accelerated.
 
                **crc32c-intel**
-                       Use hardware assisted crc32c calculation provided on SSE4.2 enabled
-                       processors. Falls back to regular software crc32c, if not supported
-                       by the system.
+                       Synonym for crc32c.
 
                **crc32**
                        Use a crc32 sum of the data area and store it in the header of each