From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Add a manual page describing xfs_spaceman's behavior. Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> --- man/man8/xfs_spaceman.8 | 102 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 man/man8/xfs_spaceman.8 diff --git a/man/man8/xfs_spaceman.8 b/man/man8/xfs_spaceman.8 new file mode 100644 index 0000000..c1d19c0 --- /dev/null +++ b/man/man8/xfs_spaceman.8 @@ -0,0 +1,102 @@ +.TH xfs_spaceman 8 +.SH NAME +xfs_spaceman \- show free space information about an XFS filesystem +.SH SYNOPSIS +.B xfs_spaceman +[ +.B \-c +.I cmd +] +.I file +.br +.B xfs_spaceman \-V +.SH DESCRIPTION +.B xfs_spaceman +reports and controls free space usage in an XFS filesystem. +.SH OPTIONS +.TP 1.0i +.BI \-c " cmd" +.B xfs_spaceman +commands may be run interactively (the default) or as arguments on +the command line. Multiple +.B \-c +arguments may be given. The commands are run in the sequence given, +then the program exits. + +.SH COMMANDS +.TP +.BI "freesp [ \-sr ] [ \-b | \-e bsize | \-h h1 [ \-m bmult ]] [-a agno]" +With no arguments, +.B freesp +shows a histogram of all free space extents in the filesystem. +The +.B -b +argument establishes that the histogram bins are successive powers of two. +This is the default. +The +.BR -h " and " -m +options can be used to specify a custom histogram bin size as well as a +multiplication factor for subsequent bin sizes. +The +.BR -e +option fixes the histogram size to a particular value. +The +.BR -a " and " -r +options constrain the free space information report to a particular AG +or the realtime device, respectively. The +.B -a +option may be specified multiple times. +A summary of free space information will be printed if the +.B -s +option is given. +.TP +.BR "help [ " command " ]" +Display a brief description of one or all commands. +.TP +.BI "prealloc [ \-ugp id ] [ \-m minlen ] [ \-s ]" +Controls speculative preallocation. The +.BR -u "," +.BR -g "," +and +.B -p +options will clear all speculative preallocations for a given user, +group, or project ID, respectively. +The +.B -m +option causes the operation to ignore any file with a size smaller than +.BR minlen "." +The +.B -s +option will flush all dirty data and metadata to disk. +.TP +.B print +Display a list of all open files. +.TP +.B quit +Exit +.BR xfs_spaceman . +.TP +.BI "trim [ \-f ] [ \-a agno ] [ \-m minlen ] [" " offset length " ] +Instructs the underlying storage device to release all storage that may +be backing free space in the filesystem. +The +.B -f +option trims all free space in the entire filesystem. +The +.B -a +option trims only the free space in a given AG. +The +.B -m +option only trims free space extents that are longer than +.IR minlen "." +The +.IR offset " and " length +arguments trim all free space between +.I offset +and +.IR "offset+length" "." +The +.BR -a " and " -f +options are mutually exclusive with each other as well as with the +.IR offset " and " length +arguments. -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
