Date: Sat, 12 Aug 2006 16:06:21 GMT From: "O. Hartmann" <ohartman@mail.uni-mainz.de> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/101926: FBSD 6.1-STABLE crashes under heavy disk (ar0) I/O and acces to USB device Message-ID: <200608121606.k7CG6LSU061613@www.freebsd.org> Resent-Message-ID: <200608121610.k7CGAB98030638@freefall.freebsd.org>
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>Number: 101926 >Category: kern >Synopsis: FBSD 6.1-STABLE crashes under heavy disk (ar0) I/O and acces to USB device >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Aug 12 16:10:11 GMT 2006 >Closed-Date: >Last-Modified: >Originator: O. Hartmann >Release: FreeBSD 6.1-STABLE/AMD64 >Organization: >Environment: FreeBSD XXX.XXX.XXX.org 6.1-STABLE FreeBSD 6.1-STABLE #27: Sat Aug 12 14:03:42 UTC 2006 root@XXX.XXX.XXX.org:/usr/obj/usr/src/sys/THOR amd64 >Description: FreeBSD 6.1-STABLE/AMD64 crashes sporadically under heavy disk I/O when accessing USB device (simply mounting is enough to crash the box). This behaviour has now been watched in several situations on an AMD64 based box, when doing a lot of disk I/O due to torrent sharing or just doing a filesystem check after a crash: box crashes without message when just mounting an USB backup harddrive or after mounting this USB HD and doing then a lot of disk I/O both on the USB device and the main RAID 0 (ar0) of the box. It is also very suspicious that doing a lot of disk I/O slows the box down just to be unusuable, reacting very, very slow. This occured after swapping the 'old' SATA disks to new Hitachi T7K250 SATA II HDs. >How-To-Repeat: Do a lot of disk I/O and then just try to mount an USB HD and do disk I/O to this USB HD while box is still under heavy load. It may lead you into a crash. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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