engines/io_uring: add support for registered files

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index 3e872bcea7ce332ab3c07060c0b24d06bc51b930..e0283f7f93ce8030ea3f82a21a7222fbcee1e6f1 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -1791,6 +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