> just now when stress testing UDF i got a panic in subr_pool:817 (pool_get). 
> Inspecting this line its a SCHED_ASSERT_UNLOCKED(). I dont have a trace 
> since the machine got wacky but in my recollection it was in vnode or buf 
> shortage and asked for a clean vnode. This vnode was then recycled from FFS 
> and then it got wrong.

the panic means that someone is calling pool_get with sched_lock held.
why do you think it's related to vnode or buf?

YAMAMOTO Takashi