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

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

The following reply was made to PR kern/40750; it has been noted by GNATS.

From: Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>
To: ad%netbsd.org@localhost
Cc: gnats-bugs%NetBSD.org@localhost, netbsd-bugs%netbsd.org@localhost, 
gnats-admin%netbsd.org@localhost
Subject: Re: kern/40750 (hackbench screws up 5.0 kernel)
Date: Sun, 29 Mar 2009 06:19:34 +0100

 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