Fix race on io_u->flags

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 662ebe32acf2e10c1956f8f768171da2f92de244..cdd6473b28f3574f7a8eca445715cb3d7156b93e 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -811,6 +811,8 @@ verify=str  If writing to a file, fio can verify the file contents
 
                        sha256  Use sha256 as the checksum function.
 
 
                        sha256  Use sha256 as the checksum function.
 

+                       sha1    Use optimized sha1 as the checksum function.
+

                        meta    Write extra information about each io
                                (timestamp, block number etc.). The block
                                number is verified.
                        meta    Write extra information about each io
                                (timestamp, block number etc.). The block
                                number is verified.


@@ -821,7 +823,11 @@ verify=str If writing to a file, fio can verify the file contents
 
                This option can be used for repeated burn-in tests of a
                system to make sure that the written data is also
 
                This option can be used for repeated burn-in tests of a
                system to make sure that the written data is also

-               correctly read back.
+               correctly read back. If the data direction given is
+               a read or random read, fio will assume that it should
+               verify a previously written file. If the data direction
+               includes any form of write, the verify will be of the
+               newly written data.

 
 verifysort=bool        If set, fio will sort written verify blocks when it deems
                it faster to read them back in a sorted manner. This is
 
 verifysort=bool        If set, fio will sort written verify blocks when it deems
                it faster to read them back in a sorted manner. This is


@@ -840,13 +846,14 @@ verify_interval=int       Write the verification header at a finer granularity
                        size of header_interval. blocksize should divide this
                        evenly.
 
                        size of header_interval. blocksize should divide this
                        evenly.
 

-verify_pattern=int     If set, fio will fill the io buffers with this
+verify_pattern=str     If set, fio will fill the io buffers with this

                pattern. Fio defaults to filling with totally random
                bytes, but sometimes it's interesting to fill with a known
                pattern for io verification purposes. Depending on the
                width of the pattern, fio will fill 1/2/3/4 bytes of the
                pattern. Fio defaults to filling with totally random
                bytes, but sometimes it's interesting to fill with a known
                pattern for io verification purposes. Depending on the
                width of the pattern, fio will fill 1/2/3/4 bytes of the

-               buffer at the time. The verify_pattern cannot be larger than
-               a 32-bit quantity.
+               buffer at the time(it can be either a decimal or a hex number).
+               The verify_pattern if larger than a 32-bit quantity has to
+               be a hex number that starts with either "0x" or "0X".

 
 verify_fatal=bool      Normally fio will keep checking the entire contents
                before quitting on a block verification failure. If this
 
 verify_fatal=bool      Normally fio will keep checking the entire contents
                before quitting on a block verification failure. If this