[Bug 793] mkfs: can't specify agcount with su,sw

[bugzilla-daemon at oss.sgi.com]

http://oss.sgi.com/bugzilla/show_bug.cgi?id=793





------- Additional Comments From peter at cordes.ca  2008-10-01 13:52 CST -------
(In reply to comment #4)
> Created an attachment (id=246)
 --> (http://oss.sgi.com/bugzilla/attachment.cgi?id=246&action=view) [edit]
> potential patch
> 
> Maybe like this ...

 Where previously mkfs.xfs would have refused to create the FS, this creates
filesystems that don't mount.  (i.e. with -d su=64k,sw=6,agcount=8.  No other
options seem to matter for this.)

mkfs.xfs version 2.10.1 (+ this patch) compiled on Ubuntu Hardy (gcc 4.2,
Ubuntu's Linux 2.6.24-21 server.)

sudo umount /data; sudo
/opt/perun/src/debian/xfsprogs/xfsprogs-2.10.1/mkfs/mkfs.xfs -f -L data -d
su=64k,sw=6,agcount=8  /dev/sdb2 && sudo mount /dev/sdb2 /data  && echo success
agsize rounded to 70172672, swidth = 96
meta-data=/dev/sdb2              isize=256    agcount=8, agsize=70172672 blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=561381403, imaxpct=5
         =                       sunit=16     swidth=96 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =internal log           bsize=4096   blocks=32768, version=2
         =                       sectsz=512   sunit=16 blks, lazy-count=0
realtime =none                   extsz=4096   blocks=0, rtextents=0
mount: Structure needs cleaning

[53220.208292] XFS: SB sanity check 2 failed
[53220.208297] XFS: SB validate failed

 Maybe the Linux kernel something else is checking alignments.  At least it's
handy for getting an agsize that I can pass to mkfs.xfs; that still works fine.

sudo umount /data; sudo
/opt/perun/src/debian/xfsprogs/xfsprogs-2.10.1/mkfs/mkfs.xfs -f -L data -d
su=64k,sw=6,agsize=$((70172672*4096))  /dev/sdb2 && sudo mount /dev/sdb2 /data 
&& echo success
umount: /data: not mounted
meta-data=/dev/sdb2              isize=256    agcount=8, agsize=70172672 blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=561381376, imaxpct=5
         =                       sunit=16     swidth=96 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =internal log           bsize=4096   blocks=32768, version=2
         =                       sectsz=512   sunit=16 blks, lazy-count=0
realtime =none                   extsz=4096   blocks=0, rtextents=0
success

[53380.401312] XFS mounting filesystem sdb2
[53380.409735] Ending clean XFS mount for filesystem: sdb2


 (BTW, I did try patching the 2.9.8 Debian source, with the same results.)

 You should be able to test this on any machine, unless the problem was specific
 to my 2.2TiB block device.  Just specify su=64k,sw=6.


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