[RFC][CFT] GEOM direct dispatch and fine-grained CAM locking

[Jeremie Le Hen]

On Fri, Sep 06, 2013 at 12:46:27AM +0200, Olivier Cochard-Labbé wrote:
> On Thu, Sep 5, 2013 at 11:38 PM, Alexander Motin <mav at freebsd.org> wrote:
> > I've found and fixed possible double request completion, that could cause
> > such symptoms if happened. Updated patch located as usual:
> > http://people.freebsd.org/~mav/camlock_patches/camlock_20130905.patch
> >
> 
> Good catch!
> this new patch (applied to r255188) fix the problem on my laptop.

With this new one I cannot boot any more (I also updated the source
tree).  This is a hand transcripted version:

Trying to mount root from zfs:zroot/root []...
panic: Batch flag already set
cpuid = 1
KDB: stack backtrace:
db_trace_self_wrapper()
kdb_backtrace()
vpanic()
kassert_panic()
xpt_batch_start()
ata_interrupt()
softclock_call_cc()
softclock()
ithread_loop()
fork_exit()
fork_trampoline()


-- 
Jeremie Le Hen

Scientists say the world is made up of Protons, Neutrons and Electrons.
They forgot to mention Morons.