kern/82456: WITNESS warning/backtrace in if_ral

[Pascal Hofstee]

>Number:         82456
>Category:       kern
>Synopsis:       WITNESS warning/backtrace in if_ral
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jun 20 22:00:37 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Pascal Hofstee
>Release:        FreeBSD 6.0-CURRENT amd64
>Organization:
>Environment:
FreeBSD synergy.charterpipeline.net.lan 6.0-CURRENT FreeBSD 6.0-CURRENT #2: Mon Jun 20 01:00:13 PDT 2005     daeron at synergy.charterpipeline.net.lan:/usr/obj/usr/src/sys/SYNERGY  amd64

>Description:
I used to see the following WITNESS warning/backtrace periodically ... though after last nights update i have only seen the warning at boot time.


malloc(M_WAITOK) of "32", forcing M_NOWAIT with the following non-sleepable locks held:
exclusive sleep mutex ral0 (network driver) r = 0 (0xffffffff80c64de8) locked @ /usr/src/sys/dev/ral/if_ral.c:2167
KDB: stack backtrace:
kdb_backtrace() at kdb_backtrace+0x37
witness_warn() at witness_warn+0x2c1
uma_zalloc_arg() at uma_zalloc_arg+0x69
malloc() at malloc+0xf5
ieee80211_ioctl_setoptie() at ieee80211_ioctl_setoptie+0x4b
ieee80211_ioctl_set80211() at ieee80211_ioctl_set80211+0x64e
ieee80211_ioctl() at ieee80211_ioctl+0x125
ral_ioctl() at ral_ioctl+0xa4
in_control() at in_control+0xc2f
ifioctl() at ifioctl+0x1f6
soo_ioctl() at soo_ioctl+0x38c
ioctl() at ioctl+0x476
syscall() at syscall+0x332
Xfast_syscall() at Xfast_syscall+0xa8
--- syscall (54, FreeBSD ELF64, ioctl), rip = 0x8007c2d4c, rsp = 0x7fffffffe038, rbp = 0x18 ---

>How-To-Repeat:
At least the first time my ral0 interface goes UP i get this warning ...
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: