UFS lockups

[Sławek Żak]

Sławek Żak <szak at era.pl> writes:

> I observe UFS lockups under heavy I/O. To reproduce the problem run around
> 10 copies of cp -Rp /usr/some-random-dir. All cp's after some time are hanging
> on getblk. du's running concurrently are hanging in ufs state. The filesystems
> are UFS2. The Server is running 5.2-BETA on SMP Dell 2650. Filesystems are laid
> on Adaptec RAID controller (aac). Any ideas how to trace the problem?

    I managed to obtain trace of one of the processes hung in the ufs
    state. Sorry for the form, I can't make a text dump of the messages.

/S