DragonFlyBSD

With recent(*) master I get kernel crash during boot.

This is i386 SMP kernel on UP system.

Turning softdep off (tunefs -n disable FS) on all file systems is work around.

After mounting a FS R/W with softdep enabled, crash is seen after
writing to FS: one small file didn't trigger, more/bigger files did.

• october 8th 2011, e.g. commit 4a568af990f84a14cd90c5fbe6b6f1709d41ca82.
  Problem seems to be in TRIM commit e0fb398bfbef1fb6d12dfb8308cdc83ce663cbc2,
  as I didn't experience problem a few commits before.

- kernel crash; core dump not possible
Fatal trap 12: supervisor read, page not present
..
page fault while in kernel mode
..
- trace
ffs_blkfree+0x18
process_worklist_item+0x17a
softdep_process_worklist+0xb8
bio_ops_sync+0x34
syncer_thread+0xf9
kthread_exit

- another crash had first line in trace different
ffs_blkfree+0x1e