Re: kern/40750 (hackbench screws up 5.0 kernel)

[Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>]

rmind%NetBSD.org@localhost wrote:
> Synopsis: hackbench screws up 5.0 kernel
> 
> State-Changed-From-To: open->feedback
> State-Changed-By: rmind%NetBSD.org@localhost
> State-Changed-When: Sun, 29 Mar 2009 05:08:21 +0000
> State-Changed-Why:
> Might not be a problem in 5.0 RC3.  Need more information.
> 

FYI: I could not reproduce the problem on -current and NetBSD 5.0_RC3:

http://www.netbsd.org/~rmind/hbtest.sh
http://www.netbsd.org/~rmind/hbtest.txt

One of the major changes between RC2 and RC3 was KVA cache for pipe direct
write (which was also disabled), though I do not see why it would send any
signals, if pipe_pgid == 0. With enabled direct write in -current, problem
does not occur, however. I have not tried reverting KVA cache changes yet..

-- 
Best regards,
Mindaugas