or
.BR clone (2).
-These system calls only have an effect when used
+These system calls have an effect only when used
in conjunction with an I/O scheduler that supports I/O priorities.
As at kernel 2.6.17 the only such scheduler is the Completely Fair Queuing
(CFQ) I/O scheduler.
One can view the current I/O scheduler via the
.I /sys
-file system.
+filesystem.
For example, the following command
displays a list of all schedulers currently loaded in the kernel:
.sp
on two assertions:
.TP
.B "Process ownership"
-An unprivileged process may only set the I/O priority of a process
+An unprivileged process may set only the I/O priority of a process
whose real UID
matches the real or effective UID of the calling process.
A process which has the
.I Documentation/block/ioprio.txt
in the Linux kernel source tree
+.SH COLOPHON
+This page is part of release 3.68 of the Linux
+.I man-pages
+project.
+A description of the project,
+information about reporting bugs,
+and the latest version of this page,
+can be found at
+\%http://www.kernel.org/doc/man\-pages/.