Re: kern/53624 (dom0 freeze on domU exit)

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR kern/53624; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: Emmanuel Dreyfus <manu%netbsd.org@localhost>
Subject: Re: kern/53624 (dom0 freeze on domU exit)
Date: Wed, 5 Dec 2018 10:35:18 +0200

 I reproduced the freeze using xenkernel411.   Here's some ddb output:
 
   db> ps
   PID    LID S CPU     FLAGS       STRUCT LWP *               NAME WAIT
   11125    1 3   0        80   ffffa30001f3f740           vnconfig fstcnt
   10492    1 3   0         0   ffffa300020c34e0           vnconfig biowait
   [...]
   0      126 3   0       200   ffffa300020834a0               vnd4 vndbp
   0      125 3   0       200   ffffa3000204e040               vnd3 fstchg
   0      124 3   0       200   ffffa30000ed1660               vnd2 vndbp
   0      123 3   0       200   ffffa30002031840               vnd1 fstchg
   0       66 3   0       200   ffffa3000088a8e0               vnd0 vndbp
   [...]
   db> call fstrans_dump
   Fstrans locks by lwp:
   [ 87719.6801535] 10492.1  (/) shared 1 cow 0
   [ 87719.6801535] Fstrans state by mount:
   [ 87719.6801535] /                state suspending
   0
   db>
 
 If there are other ddb commands I can run to help debug this, please
 let me know.  I will try to keep the system at the ddb prompt for the
 next 24 hours at least.
 -- 
 Andreas Gustafsson, gson%gson.org@localhost