Documentation update

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

diff --git a/HOWTO b/HOWTO
index d320ab3852dbc69942f69ddde8bbacd0aab127ce..3e1e62a0f4d3115fa947471febf2796150eae9f2 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -823,7 +823,9 @@ verify=str  If writing to a file, fio can verify the file contents
                                it in the header of each block.
 
                        crc32c-intel Use hardware assisted crc32c calcuation
                                it in the header of each block.
 
                        crc32c-intel Use hardware assisted crc32c calcuation

-                               provided on SSE4.2 enabled processors.
+                               provided on SSE4.2 enabled processors. Falls
+                               back to regular software crc32c, if not
+                               supported by the system.

 
                        crc32   Use a crc32 sum of the data area and store
                                it in the header of each block.
 
                        crc32   Use a crc32 sum of the data area and store
                                it in the header of each block.

diff --git a/fio.1 b/fio.1
index a42eb98eb1feca84c5442a36bbbb03aa21778e99..e737906f31d2fd0d4b5457bae6f27c8d2fde0738 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -602,7 +602,9 @@ values are:
 .RS
 .TP
 .B md5 crc16 crc32 crc32c crc32c-intel crc64 crc7 sha256 sha512 sha1
 .RS
 .TP
 .B md5 crc16 crc32 crc32c crc32c-intel crc64 crc7 sha256 sha512 sha1

-Store appropriate checksum in the header of each block.
+Store appropriate checksum in the header of each block. crc32c-intel is
+hardware accelerated SSE4.2 driven, falls back to regular crc32c if
+not supported by the system.

 .TP
 .B meta
 Write extra information about each I/O (timestamp, block number, etc.). The
 .TP
 .B meta
 Write extra information about each I/O (timestamp, block number, etc.). The