engines/io_uring: add support for registered files

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index c00579bc4a1839f9c63126bdb29d9a382cb4e3a8..e0283f7f93ce8030ea3f82a21a7222fbcee1e6f1 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -773,8 +773,13 @@ device zone size. For a regular block device or file, the specified
 .TP
 .BI zoneskip \fR=\fPint
 For \fBzonemode\fR=strided, the number of bytes to skip after \fBzonesize\fR
-bytes of data have been transferred. This parameter must be zero for
-\fBzonemode\fR=zbd.
+bytes of data have been transferred.
+
+For \fBzonemode\fR=zbd, the \fBzonesize\fR aligned number of bytes to skip
+once a zone is fully written (write workloads) or all written data in the
+zone have been read (read workloads). This parameter is valid only for
+sequential workloads and ignored for random workloads. For read workloads,
+see also \fBread_beyond_wp\fR.
 
 .TP
 .BI read_beyond_wp \fR=\fPbool
@@ -1786,6 +1791,12 @@ release them when IO is done. If this option is set, the pages are pre-mapped
 before IO is started. This eliminates the need to map and release for each IO.
 This is more efficient, and reduces the IO latency as well.
 .TP
+.BI (io_uring)registerfiles
+With this option, fio registers the set of files being used with the kernel.
+This avoids the overhead of managing file counts in the kernel, making the
+submission and completion part more lightweight. Required for the below
+sqthread_poll option.
+.TP
 .BI (io_uring)sqthread_poll
 Normally fio will submit IO by issuing a system call to notify the kernel of
 available items in the SQ ring. If this option is set, the act of submitting IO