[clug] Ext2 vs Ext3: weird benchmark result

Nathan O'Sullivan nathan at mammoth.com.au
Sat Aug 7 16:56:32 MDT 2010


> You can't remount as ext3 without unmounting, which for the rootfs is not
> trivially possible, so this is "if it was ext3 or ext2" and all.
>
>    

$ cat /proc/cmdline
root=/dev/xvda2 rootfstype=ext2 ro clocksource=tsc

$ dmesg | grep -i ext[23]
Kernel command line: root=/dev/xvda2 rootfstype=ext2 ro clocksource=tsc
EXT2-fs warning (device xvda2): ext2_fill_super: mounting ext3 
filesystem as ext2
VFS: Mounted root (ext2 filesystem) readonly on device 202:2.

$ grep ext /etc/fstab
/dev/xvda2 / ext3 noatime,nodiratime,errors=remount-ro 0 1

$ mount | grep ext
/dev/xvda2 on / type ext3 (rw,noatime,nodiratime,errors=remount-ro)


Is the output of 'mount' wrong, or am I just not understanding what 
you've said?


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