re: kern/45647: kill from ddb broken

[matthew green <mrg%eterna.com.au@localhost>]

The following reply was made to PR kern/45647; it has been noted by GNATS.

From: matthew green <mrg%eterna.com.au@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
    netbsd-bugs%netbsd.org@localhost
Subject: re: kern/45647: kill from ddb broken
Date: Thu, 01 Dec 2011 15:42:50 +1100

 > Trying to kill a process from ddb fails:
 > 
 > db{1}> kill 0t507
 > Skipping crash dump on recursive panic
 > panic: kernel diagnostic assertion "mutex_owned(proc_lock)" failed: file 
 > "../../../../kern/kern_proc.c", line 590 
 
 this is non trivial to solve.
 
 simply taking proc_lock (and more!) isn't going to work if some cpu
 was stopped mid-lock of these.
 
 perhaps a solution would be to have ddb create a thread that will go
 away that will send the signal asap...
 
 
 .mrg.