* Rex Luo <[EMAIL PROTECTED]> [010821 04:14] wrote:
> Dear,
> 
>    I modifid kernel to write to disk directly after unmount all mounted 
> filesystem in boot() kern/kern_shutdown.c. However, I found that my IO requests
> wouldn't have callback from device interrupt routine. I traced the codes and use
> gdb to find something out. The interesting is after execute 
> 
>      vfs_unmountall() -> dounmount() -> ffs_unmount() -> ffs_flushfiles() ->
>      vflush()-> ??? the interrupt mask is set by splbio() without splx(), 
>      therefore, all my following requests cannot return.
> 
> Notice that, the situation only happens after heavy IO, for example: cp 30 files
> at the same time.
> 
>    I use spl0() to solve the prolbem, but I think it's not the right way to do 
> that. Can anyone provide some clues or suggestions.

That makes no sense.  All you need to do is find the where the splbio()
is that doesn't have a corresponding splx().  You can use the SPLASSERT
functions to do that.

-- 
-Alfred Perlstein [[EMAIL PROTECTED]]
Ok, who wrote this damn function called '??'?
And why do my programs keep crashing in it?

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