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 16:28:23 +0100

 Mindaugas Rasiukevicius <rmind%netbsd.org@localhost> wrote:
 > 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..
 
 Latest 5.0/i386 with reverted sys_pipe.c to 1.105 revision:
 
 http://www.netbsd.org/~rmind/hbtest.2.txt
 
 Seems to be fine? I am missing something.
 
 -- 
 Best regards,
 Mindaugas