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Diffstat (limited to 'sys-utils/chmem.8')
| -rw-r--r-- | sys-utils/chmem.8 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sys-utils/chmem.8 b/sys-utils/chmem.8 index a116bc9e7..dae7413d4 100644 --- a/sys-utils/chmem.8 +++ b/sys-utils/chmem.8 @@ -5,6 +5,7 @@ chmem \- configure memory .B chmem .RB [ \-h "] [" \-V "] [" \-v "] [" \-e | \-d "]" [\fISIZE\fP|\fIRANGE\fP|\fB\-b\fP \fIBLOCKRANGE\fP] +[-z ZONE] .SH DESCRIPTION The chmem command sets a particular size or range of memory online or offline. . @@ -25,6 +26,19 @@ and <last> is the number of the last memory block in the memory range. Alternatively a single block can be specified. \fIBLOCKRANGE\fP requires the \fB--blocks\fP option. . +.IP "\(hy" 2 +Specify \fIZONE\fP as the name of a memory zone, as shown in the output of the +\fBlsmem -o +ZONES\fP command. The output shows one or more valid memory zones +for each memory range. If multiple zones are shown, then the memory range +currently belongs to the first zone. By default, chmem will set memory online +to the zone Movable, if this is among the valid zones. This default can be +changed by specifying the \fB--zone\fP option with another valid zone. +For memory ballooning, it is recommended to select the zone Movable for memory +online and offline, if possible. Memory in this zone is much more likely to be +able to be offlined again, but it cannot be used for arbitrary kernel +allocations, only for migratable pages (e.g. anonymous and page cache pages). +Use the \fB\-\-help\fR option to see all available zones. +. .PP \fISIZE\fP and \fIRANGE\fP must be aligned to the Linux memory block size, as shown in the output of the \fBlsmem\fP command. @@ -51,6 +65,11 @@ Set the specified \fIRANGE\fP, \fISIZE\fP, or \fIBLOCKRANGE\fP of memory offline .BR \-e ", " \-\-enable Set the specified \fIRANGE\fP, \fISIZE\fP, or \fIBLOCKRANGE\fP of memory online. .TP +.BR \-z ", " \-\-zone +Select the memory \fIZONE\fP where to set the specified \fIRANGE\fP, \fISIZE\fP, +or \fIBLOCKRANGE\fP of memory online or offline. By default, memory will be set +online to the zone Movable, if possible. +.TP .BR \-h ", " \-\-help Print a short help text, then exit. .TP |