DragonFly kernel List (threaded) for 2008-02
Re: HAMMER update 23-Feb-2008
:I've been playing with it, and while it works nice when working on a small
:amount of files, it often locks up(ctrl+T or ctrl+C won't work) during
:a task like this (I've made sure that this has no problem writing on a UFS
:# cpdup /usr/pkgsrc/. /mnt/HAMMER/.
:I added a few kprintf()'s around tsleep()'s and wakeup()'s in
:hammer_subs.c, and I found that it is often the case that it locked up,
:tsleep() won't return (because I didn't see the kprintf() message after it)
:after being woken up by hammer_lock_downgrade(). ctrl+alt+esc mostly
:works, but it takes very long time to drop into DDB once it locked up.
I think I have reproduced this on my test box, but not in a vkernel yet.
It seems to be triggered fairly reliably if I do the cpdup above in
one xterm, and try to ls -lR the target mount in another xterm.
I wasn't able to break into DDB, though. It looks like a hard loop
somewhere. Is that what you are seeing? Some sort of hard loop in