On Thu, Jun 19, 2014 at 03:33:52PM +1000, Dave Chinner wrote: > From: Dave Chinner <dchinner@xxxxxxxxxx> > > Because they are missing. > > Reported-by: Matthias Schniedermeyer <ms@xxxxxxx> > Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx> > --- > man/man8/mkfs.xfs.8 | 47 +++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 47 insertions(+) > > diff --git a/man/man8/mkfs.xfs.8 b/man/man8/mkfs.xfs.8 > index 8184e10..4ba07bf 100644 > --- a/man/man8/mkfs.xfs.8 > +++ b/man/man8/mkfs.xfs.8 > @@ -7,6 +7,9 @@ mkfs.xfs \- construct an XFS filesystem > .B \-b > .I block_size > ] [ > +.B \-m > +.I global_metadata_options > +] [ > .B \-d > .I data_section_options > ] [ > @@ -125,6 +128,50 @@ The default value is 4096 bytes (4 KiB), the minimum is 512, and the > maximum is 65536 (64 KiB). > XFS on Linux currently only supports pagesize or smaller blocks. > .TP > +.BI \-m " global_metadata_options" > +These options specify metadata format options that either apply to the entire > +filesystem or aren't easily characterised by a specific functionality group. The > +valid > +.I global_metadata_options > +are: > +.RS 1.2i > +.TP > +.BI crc= value > +This is used to create a filesystem which maintains and checks CRC information > +in all metadata objects on disk. The value is either 0 to disable the feature, > +or 1 to enable the use of CRCs. > +.IP > +CRCs enable enhanced error detection due to > +hardware issues, whilst the format changes also improves crash recovery > +algorithms and the ability of various tools to validate and repair metadata ^ extra space The rest looks good to me. Thanks for writing up the finobt bits! Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx> > +corruptions when they are found. > +The CRC algorithm used is CRC32c, so the overhead is dependent on CPU > +architecture as some CPUs have hardware acceleration of this algorithm. > +Typically the overhead of calculating and checking the CRCs is not noticable in > +normal operation. > +.IP > +By default, > +.B mkfs.xfs > +will not enable metadata CRCs. > +.TP > +.BI finobt= value > +This option enables the use of a separate free inode btree index in each > +allocation group. The value is either 0 to disable the feature, or 1 to create > +a free inode btree in each allocation group. > +.IP > +The free inode btree mirrors the existing allocated inode btree index which > +indexes both used and free inodes. The free inode btree does not index used > +inodes, allowing faster, more consistent inode allocation performance as > +filesystems age. > +.IP > +By default, > +.B mkfs.xfs > +will not create free inode btrees. This feature is also currently only available > +for filesystems created with the > +.B \-m crc=1 > +option set. > +.RE > +.TP > .BI \-d " data_section_options" > These options specify the location, size, and other parameters of the > data section of the filesystem. The valid > -- > 2.0.0 > > _______________________________________________ > xfs mailing list > xfs@xxxxxxxxxxx > http://oss.sgi.com/mailman/listinfo/xfs _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
