diff options
Diffstat (limited to 'schedutils/ionice.1')
| -rw-r--r-- | schedutils/ionice.1 | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/schedutils/ionice.1 b/schedutils/ionice.1 index 4f9cd5041..f2219535e 100644 --- a/schedutils/ionice.1 +++ b/schedutils/ionice.1 @@ -27,7 +27,7 @@ io scheduling class and priority for that process. If no class is given than .I COMMAND -will be executed with "best effort" scheduling class. The default +will be executed with "best-effort" scheduling class. The default priority argument is 4. As of this writing, a process can be in one of three scheduling classes: @@ -37,7 +37,7 @@ program has asked for disk io for a defined grace period. The impact of idle io processes on normal system activity should be zero. This scheduling class does not take a priority argument. Presently, this scheduling class is permitted for an ordinary user (since kernel 2.6.25). -.IP "\fBBest effort\fP" +.IP "\fBBest-effort\fP" This is the effective scheduling class for any process that has not asked for a specific io priority. This class takes a priority argument from \fI0-7\fR, with lower @@ -54,7 +54,7 @@ For kernels after 2.6.26 with CFQ io scheduler a process that has not asked for an io priority inherits CPU scheduling class. The io priority is derived from the cpu nice level of the process (same as before kernel 2.6.26). -.IP "\fBReal time\fP" +.IP "\fBRealtime\fP" The RT scheduling class is given first access to the disk, regardless of what else is going on in the system. Thus the RT class needs to be used with some care, as it can starve other processes. As with the best effort class, @@ -63,8 +63,8 @@ will receive on each scheduling window. This scheduling class is not permitted for an ordinary (i.e., non-root) user. .SH OPTIONS .TP -\fB\-c\fR, \fB\-\-class\fR \fINUM\fR -The scheduling class. \fI0\fR for none, \fI1\fR for real time, \fI2\fR for +\fB\-c\fR, \fB\-\-class\fR \fICLASS\fR +The scheduling class name or number. \fI0\fR for none, \fI1\fR for realtime, \fI2\fR for best-effort, \fI3\fR for idle. .TP \fB\-n\fR, \fB\-\-classdata\fR \fINUM\fR @@ -105,7 +105,10 @@ Prints the class and priority of the processes with PID 89 and 91. Linux supports io scheduling priorities and classes since 2.6.13 with the CFQ io scheduler. .SH AUTHORS +.nf Jens Axboe <jens@axboe.dk> +Karel Zak <kzak@redhat.com> +.fi .SH AVAILABILITY The ionice command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. |