Access to tape drive caused following backtrace

Scott Long scottl at samsco.org
Sat Jun 16 18:26:47 UTC 2007


It's fixed, sorry for the trouble.

Scott


Alex Burke wrote:
> Hi,
> 
> I was just doung a tar -tf /dev/sa0 when I got (hand transcribed):
> 
> uma_zalloc_arg: zone "32" with the following non-sleepable locks held:
> exclusive sleep mutex ahc_lock r = 0 (0xc3cb2eb0) locked @
> /usr/src/sys/cam/cam_
> periph.h:182
> KDB: stack backtrace:
> db_trace_self_wrapper(c01afca0,df502850,c076fcfd,c0a20063,df502864,...)
> at db_tr
> ace_self_wrapper+0x26
> kdb_backtrace(c0a20063,df502864,4,1,0,...) at kdb_backtrace+0x29
> witness_warn(5,0,c0a3a76f,c0a408e1,c3b76000,...) at witness_warn+0x41cd
> uma_zalloc_arg(c1472b40,0,102,2,c3ef6400,...) at uma_zalloc_arg+0x34
> malloc(1c,c0a564e0,102,df502900,c09d8343,...) at malloc+0xd2
> sagetparams(c3ef6484,c3ef6480,c3ef6488,df50299f,c3ef6485,...) at
> sagetparams+0x4
> 2c
> samount(c3e81a80,14c,c09d88343,b6,6,...) at samount+0x6df
> saopen(c3de8900,1,2000,c4080600,c0a56760,...) at sa_open+0x124
> giant_open(c3de8900,1,2000,c4080600,c3f08200,...) at giant_open+0x4f
> devfs_open(df502a8c,c4080600,df502b80,df502b1c,...) at devfs_open+0x230
> VOP_OPEN_APV(c0ac19e0,df502a8c,df502a78,246,c424a000,...) at
> VOP_OPEN_APV+0xa5
> vn_open_cred(df502b80,df502c78,0,c4233180,c4064e58,...) at
> vn_open_cred+0x44b
> vn_open(df502b80,df502c78,0,c4064e58,246,...) at vn_open+0x33
> kern_open(c4080600,df502cfc,c,c,c0ac4918,...) at kern_open+0xc3
> open(c4080600,df502cfc,c,c,c0ac4918,...) at open+0x30
> syscall(df502d38) at syscall+0x288
> Xint0x80_syscall() at Xint0x80_syscall+0x20
> --- syscall (5, FreeBSD ELF32, open), eip = 0x28194a7b, esp =
> 0xbfbfe9fc, ebp =
> 0xbfbfea88 ---
> 
> The machine did not panic, seemed to still be responsive. Maybe the
> problem has been fixed since the CURRENT I am running, but I thought I
> should post this anyway.
> 
> Cheers, Alex J Burke.
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