NetBSD Problem Report #38165
From woods@once.weird.com Tue Mar 4 19:19:08 2008
Return-Path: <woods@once.weird.com>
Received: from mail.netbsd.org (mail.netbsd.org [204.152.190.11])
by narn.NetBSD.org (Postfix) with ESMTP id 8E18463B863
for <gnats-bugs@gnats.NetBSD.org>; Tue, 4 Mar 2008 19:19:08 +0000 (UTC)
Message-Id: <m1JWcfG-0018LQC@once.weird.com>
Date: Tue, 4 Mar 2008 14:19:02 -0500 (EST)
From: "Greg A. Woods" <woods@planix.com>
Sender: "Greg A. Woods" <woods@once.weird.com>
Reply-To: "Greg A. Woods" <woods@planix.com>
To: gnats-bugs@gnats.NetBSD.org
Subject: pipe(2) failure, then uvm_fault(0x*, 0, 1) -> 0xe (kernel: supervisor trap page fault, code=0)
X-Send-Pr-Version: 3.95
>Number: 38165
>Category: kern
>Synopsis: pipe(2) failure, then uvm_fault(0x*, 0, 1) -> 0xe (kernel: supervisor trap page fault, code=0)
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: kern-bug-people
>State: closed
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Mar 04 19:20:00 +0000 2008
>Closed-Date: Tue Dec 22 00:25:11 +0000 2009
>Last-Modified: Tue Dec 22 00:25:11 +0000 2009
>Originator: Greg A. Woods
>Release: NetBSD 4.0_STABLE 2008/02/18
>Organization:
Planix, Inc.; Toronto, Ontario; Canada
>Environment:
System: NetBSD 4.0_STABLE GENERIC.MP
Architecture: i386
Machine: i386
>Description:
After exhibiting strange pipe(2) failures suggesting that
uvm_km_alloc() was failing despite sysctl reporting that
kern.pipe.kvasize was never even approaching close to
kern.pipe.maxkvasz I then tried to trigger increased pipe()
allocation by running a long chain of cat processes.
cat|cat|cat|cat|cat|cat|cat|cat|cat|cat|cat
The first few times with just a few (4-8?) processes all was
well, but then with a larger the system crashed as follows:
[Tue Mar 4 13:16:25 2008]uvm_fault(0xd98b1e80, 0, 1) -> 0xe
[Tue Mar 4 13:16:25 2008]kernel: supervisor trap page fault, code=0
[Tue Mar 4 13:16:25 2008]Stopped in pid 3279.1 (xterm) at netbsd:ttyinfo+0x10b: cmpb $0,0x3b4(%eax)
[Tue Mar 4 13:16:25 2008]db{0}> trace
[Tue Mar 4 13:16:39 2008]ttyinfo(d0026240,1,60e,202,c0a67274) at netbsd:ttyinfo+0x10b
[Tue Mar 4 13:16:39 2008]ttyinput_wlock(d0026248,c098a228,2ba,d98b1e80,0) at netbsd:ttyinput_wlock+0xbab
[Tue Mar 4 13:16:39 2008]ttyinput(14,d0026240,316,0,d98b0ed4) at netbsd:ttyinput+0x5a
[Tue Mar 4 13:16:39 2008]ptcwrite(601,d984aba0,110,20002,d9391a4c) at netbsd:ptcwrite+0x1fd
[Tue Mar 4 13:16:39 2008]spec_write(d984ab28,10002,2b4,202,0) at netbsd:spec_write+0xba
[Tue Mar 4 13:16:39 2008]VOP_WRITE(d9391a4c,d984aba0,110,d0020aa8,d98b1f40) at netbsd:VOP_WRITE+0x31
[Tue Mar 4 13:16:39 2008]vn_write(d97a61b0,d97a61dc,d984aba0,d0020aa8,1) at netbsd:vn_write+0x113
[Tue Mar 4 13:16:39 2008]dofilewrite(d98b0ed4,4,d97a61b0,83ce980,1) at netbsd:dofilewrite+0xac
[Tue Mar 4 13:16:39 2008]sys_write(d98b0ed4,d984ac48,d984ac68,0,c67c403c) at netbsd:sys_write+0xc9
[Tue Mar 4 13:16:39 2008]syscall_plain() at netbsd:syscall_plain+0x1a8
[Tue Mar 4 13:16:39 2008]--- syscall (number 4) ---
[Tue Mar 4 13:16:39 2008]0x81ae38b:
[Tue Mar 4 13:16:39 2008]db{0}> call simple_lock_dump
[Tue Mar 4 13:17:15 2008]all simple locks:
[Tue Mar 4 13:17:15 2008]0xc0a67274 CPU 0 /rest/work/woods/m-NetBSD-4/sys/kern/kern_lock.c:1550
[Tue Mar 4 13:17:15 2008]0xd0026248 CPU 0 /rest/work/woods/m-NetBSD-4/sys/kern/tty.c:698
[Tue Mar 4 13:17:15 2008]0x80000000
[Tue Mar 4 13:17:15 2008]db{0}> ps
[Tue Mar 4 13:17:22 2008] PID PPID PGRP UID S FLAGS LWPS COMMAND WAIT
[Tue Mar 4 13:17:22 2008] 13242 447 15 0 2 0x4000 1 sleep nanosle
[Tue Mar 4 13:17:22 2008] 12256 11114 12256 1000 2 0x4002 1 sleep nanosle
[Tue Mar 4 13:17:22 2008] 19860 6444 19860 1000 2 0x4001 1 aspell piperd
[Tue Mar 4 13:17:22 2008] 21966 193 21966 1000 2 0x4002 1 tail kqread
[Tue Mar 4 13:17:22 2008] 18628 8374 18628 1000 2 0x4003 1 ksh ttyin
[Tue Mar 4 13:17:22 2008] 8374 551 551 0 2 0x4100 1 rlogind poll
[Tue Mar 4 13:17:22 2008] 20168 13726 20168 0 2 0x4002 1 ksh ttyin
[Tue Mar 4 13:17:22 2008] 13726 9083 13726 1000 2 0x4002 1 ksh pause
[Tue Mar 4 13:17:22 2008] 9083 13974 9083 1000 2 0x4000 1 xterm select
[Tue Mar 4 13:17:22 2008] 13974 551 551 0 2 0x4100 1 rshd poll
[Tue Mar 4 13:17:22 2008] 11114 11046 11114 1000 2 0x4002 1 ksh pause
[Tue Mar 4 13:17:22 2008] 11046 9563 11046 1000 2 0x4000 1 xterm select
[Tue Mar 4 13:17:22 2008] 9563 551 551 0 2 0x4100 1 rshd poll
[Tue Mar 4 13:17:22 2008] 6860 6689 6860 1000 2 0x4000 1 emacsserver select
[Tue Mar 4 13:17:22 2008] 6689 8946 6689 1000 2 0x4000 1 emacs select
[Tue Mar 4 13:17:22 2008] 8946 551 551 0 2 0x4100 1 rshd poll
[Tue Mar 4 13:17:22 2008] 8279 4753 8279 0 2 0x4002 1 ksh ttyin
[Tue Mar 4 13:17:22 2008] 5978 6654 5978 1000 2 0x4002 1 ksh ttyin
[Tue Mar 4 13:17:22 2008] 6654 5520 6654 1000 2 0x4000 1 xterm select
[Tue Mar 4 13:17:22 2008] 5520 551 551 0 2 0x4100 1 rshd poll
[Tue Mar 4 13:17:22 2008] 5529 6444 5529 1000 2 0x4000 1 emacsserver select
[Tue Mar 4 13:17:22 2008] 6444 5279 6444 1000 2 0x4000 1 emacs select
[Tue Mar 4 13:17:22 2008] 5279 551 551 0 2 0x4100 1 rshd poll
[Tue Mar 4 13:17:22 2008] 3711 3279 3711 1000 2 0x4002 1 ksh pause
[Tue Mar 4 13:17:22 2008]>3279 3240 3279 1000 2 0x4000 1 xterm
[Tue Mar 4 13:17:22 2008] 3450 4753 3450 1000 2 0x4002 1 xload poll
[Tue Mar 4 13:17:22 2008] 3240 551 551 0 2 0x4100 1 rshd poll
[Tue Mar 4 13:17:22 2008] 4753 4386 4753 1000 2 0x4002 1 ksh pause
[Tue Mar 4 13:17:22 2008] 4386 4821 4386 1000 2 0x4000 1 xterm select
[Tue Mar 4 13:17:22 2008] 4821 551 551 0 2 0x4100 1 rshd poll
[Tue Mar 4 13:17:22 2008] 195 1 195 0 2 0x4002 1 getty ttyin
[Tue Mar 4 13:17:22 2008] 194 1 194 0 2 0x4002 1 getty ttyin
[Tue Mar 4 13:17:22 2008] 193 1 193 1000 2 0x4002 1 ksh pause
[Tue Mar 4 13:17:22 2008] 192 1 192 0 2 0x4002 1 getty ttyin
[Tue Mar 4 13:17:22 2008] 1894 1 1894 0 2 0x4002 1 getty ttyin
[Tue Mar 4 13:17:22 2008] 2422 1 2422 0 2 0x4002 1 ksh ttyin
[Tue Mar 4 13:17:22 2008] 1834 1 1834 0 2 0x4002 1 getty ttyin
[Tue Mar 4 13:17:22 2008] 2354 1 2354 0 2 0x4002 1 getty ttyin
[Tue Mar 4 13:17:22 2008] 2297 1 2297 0 2 0 1 afpd select
[Tue Mar 4 13:17:22 2008] 2352 1 2352 0 2 0x400 3 apcupsd *
[Tue Mar 4 13:17:22 2008] 1763 1 1763 0 2 0 1 cron nanosle
[Tue Mar 4 13:17:22 2008] 551 1 551 0 2 0 1 inetd kqread
[Tue Mar 4 13:17:22 2008] 1764 1854 2197 111 2 0x4001 1 rrdtool piperd
[Tue Mar 4 13:17:22 2008] 1854 1 2197 111 2 0x100 1 lighttpd poll
[Tue Mar 4 13:17:22 2008] 1707 1 1707 0 2 0 1 papd select
[Tue Mar 4 13:17:22 2008] 1454 1917 1917 0 2 0x1 1 saslauthd lockf
[Tue Mar 4 13:17:22 2008] 1556 1917 1917 0 2 0x1 1 saslauthd lockf
[Tue Mar 4 13:17:23 2008] 2071 1917 1917 0 2 0x1 1 saslauthd lockf
[Tue Mar 4 13:17:23 2008] 1980 1917 1917 0 2 0x1 1 saslauthd lockf
[Tue Mar 4 13:17:23 2008] 1917 1 1917 0 2 0x1 1 saslauthd netcon
[Tue Mar 4 13:17:23 2008] 1517 1 1516 0 2 0 1 snmpd select
[Tue Mar 4 13:17:23 2008] 617 1 617 0 2 0 1 snmptrapd select
[Tue Mar 4 13:17:23 2008] 1811 1 1811 0 2 0 1 sshd2 select
[Tue Mar 4 13:17:23 2008] 1874 1 1874 0 2 0 1 timelord netio
[Tue Mar 4 13:17:23 2008] 232 1 232 0 2 0x1000 1 atalkd select
[Tue Mar 4 13:17:23 2008] 410 1 410 19 2 0x100 1 rwhod poll
[Tue Mar 4 13:17:23 2008] 175 1 175 15 2 0x100 1 ntpd pause
[Tue Mar 4 13:17:23 2008] 629 1 629 0 2 0 1 lpd poll
[Tue Mar 4 13:17:23 2008] 447 1 15 0 2 0x4002 1 sh wait
[Tue Mar 4 13:17:23 2008] 598 1 15 0 2 0 1 arpwatch bpf
[Tue Mar 4 13:17:23 2008] 101 1 101 0 2 0 1 rpc.lockd select
[Tue Mar 4 13:17:23 2008] 97 1 97 0 2 0xa0008 1 rpc.statd select
[Tue Mar 4 13:17:23 2008] 96 504 504 0 2 0 1 nfsd nfsd
[Tue Mar 4 13:17:23 2008] 592 504 504 0 2 0 1 nfsd nfsd
[Tue Mar 4 13:17:23 2008] 567 504 504 0 2 0 1 nfsd nfsd
[Tue Mar 4 13:17:23 2008] 473 504 504 0 2 0 1 nfsd nfsd
[Tue Mar 4 13:17:23 2008] 504 1 504 0 2 0 1 nfsd poll
[Tue Mar 4 13:17:23 2008] 497 1 497 0 2 0 1 mountd select
[Tue Mar 4 13:17:23 2008] 411 0 0 0 2 0x20200 1 nfsio nfsidl
[Tue Mar 4 13:17:23 2008] 350 0 0 0 2 0x20200 1 nfsio nfsidl
[Tue Mar 4 13:17:23 2008] 412 0 0 0 2 0x20200 1 nfsio nfsidl
[Tue Mar 4 13:17:23 2008] 435 0 0 0 2 0x20200 1 nfsio nfsidl
[Tue Mar 4 13:17:23 2008] 413 1 413 0 2 0 1 mount_mfs mfsidl
[Tue Mar 4 13:17:23 2008] 351 1 351 0 2 0 1 rpcbind poll
[Tue Mar 4 13:17:23 2008] 314 1 314 0 2 0 1 syslogd
[Tue Mar 4 13:17:23 2008] 52 0 0 0 2 0x20200 1 physiod physiod
[Tue Mar 4 13:17:23 2008] 14 0 0 0 2 0x20200 1 aiodoned aiodone
[Tue Mar 4 13:17:23 2008] 13 0 0 0 2 0x20200 1 ioflush syncer
[Tue Mar 4 13:17:23 2008] 12 0 0 0 2 0x20200 1 pagedaemon pgdaemo
[Tue Mar 4 13:17:23 2008] 11 0 0 0 2 0x20200 1 atapibus0 sccomp
[Tue Mar 4 13:17:23 2008] 10 0 0 0 2 0x20200 1 cryptoret crypto_
[Tue Mar 4 13:17:23 2008] 9 0 0 0 2 0x20200 1 usbtask-dr usbtsk
[Tue Mar 4 13:17:23 2008] 8 0 0 0 2 0x20200 1 usbtask-hc usbtsk
[Tue Mar 4 13:17:23 2008] 7 0 0 0 2 0x20200 1 usb0 usbevt
[Tue Mar 4 13:17:23 2008] 6 0 0 0 2 0x20200 1 atabus1 atath
[Tue Mar 4 13:17:23 2008] 5 0 0 0 2 0x20200 1 atabus0 atath
[Tue Mar 4 13:17:23 2008] 4 0 0 0 2 0x20200 1 ipmi0 ipmi_po
[Tue Mar 4 13:17:23 2008] 3 0 0 0 2 0x20200 1 apm0 apmev
[Tue Mar 4 13:17:23 2008] 2 0 0 0 2 0x20200 1 sysmon smtaskq
[Tue Mar 4 13:17:23 2008] 1 0 1 0 2 0x4001 1 init wait
[Tue Mar 4 13:17:23 2008] 0 -1 0 0 2 0x20200 1 swapper schedul
[Tue Mar 4 13:17:23 2008] 16972 3711 13609 1000 5 0x6002 0 cat *
[Tue Mar 4 13:17:23 2008] 13778 37 cat *
[Tue Mar 4 13:17:23 2008] 15941 3711 13609 1000 5 0x6002 0 cat *
[Tue Mar 4 13:17:23 2008] 23164 3711 13609 1000 5 0x6002 0 cat *
[Tue Mar 4 13:17:23 2008] 12097 3711 13609 1000 5 0x6002 0 cat *
[Tue Mar 4 13:17:23 2008] 8687 3711 13609 1000 5 0x6002 0 cat *
[Tue Mar 4 13:17:23 2008] 13609 3711 13609 1000 5 0x6002 0 cat *
[Tue Mar 4 13:17:23 2008] 12170 3711 13609 1000 5 0x6002 0 cat *
[Tue Mar 4 13:17:23 2008] 17652 3711 3711 1000 5 0x6002 0 date *
[Tue Mar 4 13:17:23 2008]db{0}> reboot
[Tue Mar 4 13:17:32 2008]syncing disks...
[Tue Mar 4 13:17:34 2008]switching with held simple_lock 0xd0026248 CPU 0 /rest/work/woods/m-NetBSD-4/sys/kern/tty.c:698
[Tue Mar 4 13:17:34 2008]copyright(0,0,c6798800,d98b0ed4,0) at 0xc098778c
[Tue Mar 4 13:17:34 2008]cpu_info_primary(c5eb6f84,c09cce38,c09c9fc0,c09f9c80,0) at 0xc09f9cc0
[Tue Mar 4 13:17:34 2008]Stopped in pid 3279.1 (xterm) at netbsd:cpu_Debugger+0x4: popl %ebp
[Tue Mar 4 13:17:34 2008]db{0}> call simple_lock_dump
[Tue Mar 4 13:17:42 2008]all simple locks:
[Tue Mar 4 13:17:42 2008]0xd0026248 CPU 0 /rest/work/woods/m-NetBSD-4/sys/kern/tty.c:698
[Tue Mar 4 13:17:42 2008]0xc09d9bf4 CPU 0 /rest/work/woods/m-NetBSD-4/sys/kern/kern_synch.c:903
[Tue Mar 4 13:17:42 2008]0x80000000
[Tue Mar 4 13:17:42 2008]db{0}> trace
[Tue Mar 4 13:17:47 2008]cpu_Debugger(c09d9bf4,c0930224,d984a2c8,c0432f31,c09d9bf4) at netbsd:cpu_Debugger+0x4
[Tue Mar 4 13:17:47 2008]simple_lock_switchcheck(c09d9bf4,c092fe19,c098778c,3a7,2) at netbsd:simple_lock_switchcheck+0x1b
[Tue Mar 4 13:17:47 2008]mi_switch(d98b0ed4,0,387,c6796f00,0) at netbsd:mi_switch+0x51
[Tue Mar 4 13:17:47 2008]preempt(1,c098b864,4c1,c095e5fd,d984a350) at netbsd:preempt+0x85
[Tue Mar 4 13:17:47 2008]genfs_do_putpages(f49f900c,0,0,0,0) at netbsd:genfs_do_putpages+0x9ae
[Tue Mar 4 13:17:47 2008]genfs_putpages(d984a4cc,c0985f7c,398,c07c4a60,f49f900c) at netbsd:genfs_putpages+0x3d
[Tue Mar 4 13:17:47 2008]VOP_PUTPAGES(f49f900c,0,0,0,0) at netbsd:VOP_PUTPAGES+0x40
[Tue Mar 4 13:17:47 2008]ffs_fsync(d984a5b4,f49f900c,d984a5d8,c047c332,f49f900c) at netbsd:ffs_fsync+0x41e
[Tue Mar 4 13:17:47 2008]VOP_FSYNC(f49f900c,d0020aa8,0,0,0) at netbsd:VOP_FSYNC+0x49
[Tue Mar 4 13:17:47 2008]ffs_sync(c6b53000,2,d0020aa8,d98b0ed4,c0100d5e) at netbsd:ffs_sync+0x107
[Tue Mar 4 13:17:47 2008]sys_sync(d98b0ed4,0,0,c017e9e0,0) at netbsd:sys_sync+0x130
[Tue Mar 4 13:17:47 2008]vfs_shutdown(20,d983b9bc,0,d98b0ed4,0) at netbsd:vfs_shutdown+0x6a
[Tue Mar 4 13:17:47 2008]cpu_reboot(0,0,d984a738,c04479fc,c07abc20) at netbsd:cpu_reboot+0x22d
[Tue Mar 4 13:17:47 2008]db_reboot_cmd(c045970b,0,c0a2b127,d984a6ec,a) at netbsd:db_reboot_cmd+0x48
[Tue Mar 4 13:17:47 2008]db_command(c091f0c2,0,c0b2264a,0,d983b9bc) at netbsd:db_command+0xb0
[Tue Mar 4 13:17:47 2008]db_command_loop(c045970b,ccf,1,d983bb69,800) at netbsd:db_command_loop+0xe5
[Tue Mar 4 13:17:47 2008]db_trap(6,0,58,c5e9fe58,0) at netbsd:db_trap+0x119
[Tue Mar 4 13:17:47 2008]kdb_trap(6,0,d984a914,1,e) at netbsd:kdb_trap+0x162
[Tue Mar 4 13:17:48 2008]trap() at netbsd:trap+0x30e
[Tue Mar 4 13:17:48 2008]--- trap (number 6) ---
[Tue Mar 4 13:17:48 2008]ttyinfo(d0026240,1,60e,202,c0a67274) at netbsd:ttyinfo+0x10b
[Tue Mar 4 13:17:48 2008]ttyinput_wlock(d0026248,c098a228,2ba,d98b1e80,0) at netbsd:ttyinput_wlock+0xbab
[Tue Mar 4 13:17:48 2008]ttyinput(14,d0026240,316,0,d98b0ed4) at netbsd:ttyinput+0x5a
[Tue Mar 4 13:17:48 2008]ptcwrite(601,d984aba0,110,20002,d9391a4c) at netbsd:ptcwrite+0x1fd
[Tue Mar 4 13:17:48 2008]spec_write(d984ab28,10002,2b4,202,0) at netbsd:spec_write+0xba
[Tue Mar 4 13:17:48 2008]VOP_WRITE(d9391a4c,d984aba0,110,d0020aa8,d98b1f40) at netbsd:VOP_WRITE+0x31
[Tue Mar 4 13:17:48 2008]vn_write(d97a61b0,d97a61dc,d984aba0,d0020aa8,1) at netbsd:vn_write+0x113
[Tue Mar 4 13:17:48 2008]dofilewrite(d98b0ed4,4,d97a61b0,83ce980,1) at netbsd:dofilewrite+0xac
[Tue Mar 4 13:17:48 2008]sys_write(d98b0ed4,d984ac48,d984ac68,0,c67c403c) at netbsd:sys_write+0xc9
[Tue Mar 4 13:17:48 2008]syscall_plain() at netbsd:syscall_plain+0x1a8
[Tue Mar 4 13:17:48 2008]--- syscall (number 4) ---
[Tue Mar 4 13:17:48 2008]0x81ae38b:
[Tue Mar 4 13:17:48 2008]db{0}> reboot
[Tue Mar 4 13:17:53 2008]rebooting...
>How-To-Repeat:
>Fix:
unknown
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback
State-Changed-By: rmind@NetBSD.org
State-Changed-When: Fri, 27 Nov 2009 04:39:02 +0000
State-Changed-Why:
Cannot reproduce in -current. It was likely fixed in netbsd-5/-current.
Do you see any similar problem on recent systems?
From: "Greg A. Woods" <woods@planix.com>
To: NetBSD GNATS <gnats-bugs@NetBSD.org>
Cc: kern-bug-people@netbsd.org,
NetBSD GNATS Administrator <gnats-admin@NetBSD.org>,
rmind@NetBSD.org
Subject: Re: kern/38165 (pipe(2) failure, then uvm_fault(0x*, 0, 1) -> 0xe (kernel: supervisor trap page fault, code=0))
Date: Fri, 27 Nov 2009 12:21:09 -0500
--pgp-sign-Multipart_Fri_Nov_27_12:21:09_2009-1
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: quoted-printable
At Fri, 27 Nov 2009 04:39:03 +0000 (UTC), rmind@NetBSD.org wrote:
Subject: Re: kern/38165 (pipe(2) failure, then uvm_fault(0x*, 0, 1) -> 0xe =
(kernel: supervisor trap page fault, code=3D0))
>=20
> Synopsis: pipe(2) failure, then uvm_fault(0x*, 0, 1) -> 0xe (kernel: supe=
rvisor trap page fault, code=3D0)
>=20
> State-Changed-From-To: open->feedback
> State-Changed-By: rmind@NetBSD.org
> State-Changed-When: Fri, 27 Nov 2009 04:39:02 +0000
> State-Changed-Why:
> Cannot reproduce in -current. It was likely fixed in netbsd-5/-current.
> Do you see any similar problem on recent systems?
Unfortunately I do not have any systems running or in development beyond
netbsd-4 yet. (Go Git Go! ;-))
I would suggest trying to reproduce the problem in netbsd-5, and if
it works there for insanely long pipelines then we can close this PR.
I do see a _lot_ of changes in sys/kern/sys_pipe.c since netbsd-4! :-)
But from what I see, I don't think it would be very easy to factor out a
change which might fix this problem for netbsd-4, if indeed this is
where the bug is in the first place.
--=20
Greg A. Woods
+1 416 218-0098 VE3TCP RoboHack <woods@robohack.ca>
Planix, Inc. <woods@planix.com> Secrets of the Weird <woods@weird.com>
--pgp-sign-Multipart_Fri_Nov_27_12:21:09_2009-1
Content-Type: application/pgp-signature
Content-Transfer-Encoding: 7bit
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (NetBSD)
iD8DBQBLEAqFZn1xt3i/9H8RAm4JAJ0SeH0mbDUS8ndkHdBNzCbZiWdFjQCeIVvv
dBcQwZnsMzw+9aLlsaiQjGI=
=w2OP
-----END PGP SIGNATURE-----
--pgp-sign-Multipart_Fri_Nov_27_12:21:09_2009-1--
From: Matthew Mondor <mm_lists@pulsar-zone.net>
To: gnats-bugs@NetBSD.org
Cc:
Subject: Re: kern/38165 (pipe(2) failure, then uvm_fault(0x*, 0, 1) -> 0xe
(kernel: supervisor trap page fault, code=0))
Date: Fri, 27 Nov 2009 22:01:34 -0500
On Fri, 27 Nov 2009 17:25:02 +0000 (UTC)
"Greg A. Woods" <woods@planix.com> wrote:
> Unfortunately I do not have any systems running or in development beyond
> netbsd-4 yet. (Go Git Go! ;-))
On netbsd-5 I'm unable to reproduce the bug using more than a douzen
consecutive runs of a command containing a hundred piped cat(1)
(feeding them a few lines followed by an EOF).
Assuming that this is enough to trigger the bug on netbsd-4 it seems to
indeed have been fixed since...
I observed various problems if there were enough piped instances to
cause sh vfork errors, in which case STOPed cat(1) processes would
remain pending (possibly an sh(1) bug not handling vfork(2) failures
gracefully?). After enough of them sh(1) also got stuck into an
endless RUN loop, but killing that sh process restored the system to a
normal state.
Thanks,
--
Matt
From: "Greg A. Woods" <woods@planix.com>
To: NetBSD GNATS <gnats-bugs@NetBSD.org>
Cc: NetBSD Kernel Bug People <kern-bug-people@netbsd.org>,
NetBSD GNATS Administrator <gnats-admin@NetBSD.org>
Subject: Re: kern/38165 (pipe(2) failure, then uvm_fault(0x*, 0, 1) -> 0xe (kernel: supervisor trap page fault, code=0))
Date: Mon, 21 Dec 2009 18:46:10 -0500
--pgp-sign-Multipart_Mon_Dec_21_18:46:10_2009-1
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: quoted-printable
I think given Matt's testing on NetBSD-5 I agree we should close this PR.
--=20
Greg A. Woods
+1 416 218-0098 VE3TCP RoboHack <woods@robohack.ca>
Planix, Inc. <woods@planix.com> Secrets of the Weird <woods@weird.com>
--pgp-sign-Multipart_Mon_Dec_21_18:46:10_2009-1
Content-Type: application/pgp-signature
Content-Transfer-Encoding: 7bit
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (NetBSD)
iD8DBQBLMAjCZn1xt3i/9H8RAmdqAJ9S0xRxKDo6EhZD661/mHwB2QQTIQCg6kXM
K57imKm356Dim/UvgXhgYAI=
=DJyQ
-----END PGP SIGNATURE-----
--pgp-sign-Multipart_Mon_Dec_21_18:46:10_2009-1--
State-Changed-From-To: feedback->closed
State-Changed-By: mrg@NetBSD.org
State-Changed-When: Tue, 22 Dec 2009 00:25:11 +0000
State-Changed-Why:
thanks.
>Unformatted:
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD: gnats_config.sh,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
Copyright © 1994-2007
The NetBSD Foundation, Inc. ALL RIGHTS RESERVED.
Home