Ext3 is supported not well at 2.6.28 for external SD card removal

[schen@mvista.com (Steve Chen)]

On Mon, 2009-10-19 at 16:29 +0800, Peter Chen wrote:
> Uwe Kleine-K?nig wrote:
> > Hello,
> > 
> > On Mon, Oct 19, 2009 at 03:46:11PM +0800, Peter Chen wrote:
> >> Marek Vasut wrote:
> >>> Dne Po 19. ??jna 2009 07:38:35 Peter Chen napsal(a):
> >>> You popped the card out without unmounting the filesystem I guess ?
> >> We don't execute umount at 2.6.27/23 either, and it has little error:
> >> [   32.541208] Buffer I/O error on device mmcblk1p1, logical block 0
> >> [   32.544784] lost page write due to I/O error on mmcblk1p1
> >>
> >> Besides, the remove card is ok after suspend at 2.6.27 and 2.6.23.
> >>
> >> Usually, the remove card(ext3) without umount is forbiddon or not?
> > You shouldn't remove the card without unmounting first.  And you should
> > unmount with .23 and .27, too.  Just because these kernels don't wail it
> > doesn't mean you cannot loose data.
> > 
> > Best regards
> > Uwe
> > 
> I find the system still will be deadlock if i use sync before go to suspend.
> I wonder why system will go to deadlock even there is not card at slot.
> 

Is this specific to ext3?  Does it happen to other file systems such as
xfs?

Regards,

Steve