Re: rd.o module refcount problem

[Russell King]

On Thu, May 29, 2003 at 03:55:10PM +0530, Maneesh Soni wrote:
> The module ref count for rd.o module is not adjusted and remains 1 while
> doing the following things. 
> 
> [root@llm01 mod]# insmod /sdb/linux-2.5.70/drivers/block/rd.o
> [root@llm01 mod]# lsmod
> Module                  Size  Used by
> rd                      5568  0 - Live 0xf88b5000
> [root@llm01 mod]# mkfs -t ext2 /dev/ram0
> .
> .
> [root@llm01 mod]# lsmod
> Module                  Size  Used by
> rd                      5568  1 - Live 0xf88b5000
> 
> mount/umount of /dev/ram0 does not change the rd.o module ref count. 
> 
> So, who is supposed to release the rd.o module gracefully? 
> Also mount /dev/ram0 should hold a ref and umount should release the same.
> 
> Same test on 2.4.20 looks correct and mount increments the ref count and
> umount decrements the ref count.

I think you'll find you have to tell the ramdisk to invalidate its contents
before the module count drops.

-- 
Russell King ([e-mail])                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html