>Number:         35071
>Category:       kern
>Synopsis:       panic: mpt_get_request: corrupted request free list (xfer)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Nov 18 10:45:00 +0000 2006
>Originator:     Tracy Di Marco White
>Release:        NetBSD 4.0_BETA
>Organization:
Iowa State University
>Environment:
System: NetBSD blackhole.ait.iastate.edu 4.0_BETA NetBSD 4.0_BETA (GENERIC) #0: Mon Sep 11 09:48:17 CDT 2006 root@blackhole.ait.iastate.edu:/usr/obj/usr/src/sys/arch/i386/compile/GENERIC i386
Architecture: i386
Machine: i386
>Description:
panic: mpt_get_request: corrupted request free list (xfer)

Stopped in pid 21393.1 (tibsmnt) at     netbsd:cpu_Debugger+0x4:        leave
db>  t
cpu_Debugger(dcb8fa48,10002,0,cf2c2828,c4bc9400) at netbsd:cpu_Debugger+0x4
panic(c08317f8,6,da8b96a4,0,1) at netbsd:panic+0x141
mpt_get_request(c4bc9400,10002,cf2c286c,c042a7f0,dcb8f9d8) at netbsd:mpt_get_request+0x5b
mpt_scsipi_request(c4bc96dc,0,c4298f44,0,cf2c2900) at netbsd:mpt_scsipi_request+0x4d
scsipi_run_queue(da8b96a4,0,c4d65100,c4bc96dc,0) at netbsd:scsipi_run_queue+0x184
scsipi_execute_xs(c4298f44,cf2c2982,6,0,0) at netbsd:scsipi_execute_xs+0x17e
scsipi_test_unit_ready(c4d65100,a0,0,dcb8f9d8,dcb8f9d8) at netbsd:scsipi_test_unit_ready+0x4d
stopen(e11,801,2000,dd9ff4ec,dcb8f9d8) at netbsd:stopen+0xd6
spec_open(cf2c2a78,cf31cb58,4d2,0,4d2) at netbsd:spec_open+0x1df
VOP_OPEN(dcb8f9d8,801,cf31cb58,dd9ff4ec,dd9ff4ec) at netbsd:VOP_OPEN+0x2f
vn_open(cf2c2b68,801,d60,dd9ff4ec,c0886444) at netbsd:vn_open+0x266
sys_open(dd9ff4ec,cf2c2c00,cf2c2c68,bba50000,23) at netbsd:sys_open+0xa0
linux_sys_open(dd9ff4ec,cf2c2c48,cf2c2c68,8563f70,8050000) at netbsd:linux_sys_open+0x70
linux_syscall_plain(cf2c2c88,bba7002b,bba7002b,bfbf002b,bbbf002b) at netbsd:linux_syscall_plain+0xa8

Same machine and version as in PR #34892
http://gendalia.public.iastate.edu/blackhole.dmesg.txt

>How-To-Repeat:
Don't think I've repeated this panic on this version of NetBSD.
>Fix: