rd.o module refcount problem
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.
Regards,
Maneesh
Signature · 5 lines
Maneesh Soni IBM Linux Technology Center, IBM India Software Lab, Bangalore. Phone: +91-80-5044999 email: [email protected] http://lse.sourceforge.net/
Quoted 14 lines · Maneesh Soni
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]# lsmodModule Size Used by rd 5568 1 - Live 0xf88b5000
Quoted 7 lines
mount/umount of
/dev/ram0does not change the rd.o module ref count.So, who is supposed to release the rd.o module gracefully? Also mount
/dev/ram0should 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.
Signature · 2 lines
Russell King ([email protected]) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html