Hi, I've just found what it seems to me an error somewhere in the KLD modules implementation affecting both 4-STABLE and 5-CURRENT. Following course of actions makes kernel panic on both releases: 1. Load vn module into kernel 2. Configure vn device using vnconfig 3. Mount vn device 4. Unmount vn device 5. Unconfigure vn device 6. Unload vn kernel module 7. Try to mount vn device. Instead of expected "device not configured" you'll have kernel panic. It seems that vn device failed to deregister itself properly on kldunload. -Maxim Following is script of my session: # kldstat Id Refs Address Size Name 1 2 0xc0100000 1c2f48 kernel 2 1 0xc02c3000 30c8 splash_bmp.ko root@notebook# vnconfig -c /dev/vn0 /tmp/tst root@notebook# kldstat Id Refs Address Size Name 1 3 0xc0100000 1c2f48 kernel 2 1 0xc02c3000 30c8 splash_bmp.ko 3 1 0xc08b9000 3000 vn.ko root@notebook# mount /dev/vn0c /mnt root@notebook# mount /dev/ad0s1a on / (ufs, asynchronous, NFS exported, local, noatime, writes: sync 4 async 41, reads: sync 507 async 22) procfs on /proc (procfs, local) /dev/vn0c on /mnt (ufs, local, writes: sync 2 async 0, reads: sync 1 async 0) root@notebook# umount /mnt root@notebook# vnconfig -u /dev/vn0 root@notebook# kldunload -i 3 root@notebook# kldstat Id Refs Address Size Name 1 2 0xc0100000 1c2f48 kernel 2 1 0xc02c3000 30c8 splash_bmp.ko root@notebook# mount /dev/vn0c /mnt Fatal trap 12: page fault while in kernel mode fault virtual address = 0xc08bb9f0 fault code = supervisor read, page not present instruction pointer = 0x8:0xc016d9b9 stack pointer = 0x10:0xc3313d64 frame pointer = 0x10:0xc3313d70 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 209 (mount) interrupt mask = none trap number = 12 panic: page fault To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
