Subject: kern/37192: netbsd-4 MP kernel hang
To: None <kern-bug-people@netbsd.org, gnats-admin@netbsd.org,>
From: None <anil_public@yahoo.com>
List: netbsd-bugs
Date: 10/24/2007 08:10:01
>Number: 37192
>Category: kern
>Synopsis: netbsd-4 MP kernel hang
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Wed Oct 24 08:10:00 +0000 2007
>Originator: Anil Gopinath
>Release: NetBSD-4
>Organization:
>Environment:
>Description:
After some intense i/o to an an lfs partition, a netbsd-4 based MP kernel appears to hang. There is no response to ping and the console is unresponsive. The kernel is running on a amd64 based platform.
This issue is not reproducible with the single processor kernel.
Here is the info from ddb (always the same for all hangs):
db{0}> bt
cpu_Debugger() at netbsd:cpu_Debugger+0x5
comintr() at netbsd:comintr+0x725
Xintr_ioapic_edge4() at netbsd:Xintr_ioapic_edge4+0xd4
--- interrupt ---
brelvp() at netbsd:brelvp+0xa0
lfs_cluster_aiodone() at netbsd:lfs_cluster_aiodone+0x1d3
uvm_aiodone_daemon() at netbsd:uvm_aiodone_daemon+0xd2
db{0}>
5179 0 0 0 2 0x20200 1 lfs_writer lfswrit
5174 0 0 0 2 0x20200 1 vnd0 vndbp
5151 0 0 0 2 0x20200 1 physiod physiod
19 1 19 0 2 0 1 mount_mfs mfsidl
16 1 16 0 2 0x4002 1 sh wait
>15 0 0 0 2 0x20200 1 aiodoned
14 0 0 0 2 0x20200 1 ioflush syncer
13 0 0 0 2 0x20200 1 pagedaemon pgdaemo
12 0 0 0 2 0x20200 1 atabus3 atath
11 0 0 0 2 0x20200 1 atabus2 atath
10 0 0 0 2 0x20200 1 atabus1 atath
9 0 0 0 2 0x20200 1 atabus0 atath
8 0 0 0 2 0x20200 1 usb3 usbevt
7 0 0 0 2 0x20200 1 usb2 usbevt
6 0 0 0 2 0x20200 1 usb1 usbevt
5 0 0 0 2 0x20200 1 usbtask-dr usbtsk
4 0 0 0 2 0x20200 1 usbtask-hc usbtsk
3 0 0 0 2 0x20200 1 usb0 usbevt
2 0 0 0 2 0x20200 1 sysmon smtaskq
1 0 1 0 2 0x4000 1 init wait
0 -1 0 0 2 0x20200 1 swapper schedul
>How-To-Repeat:
>Fix: