Thanks for the replies. Well my problem is that I don't seem to be spawning the owner thread. i.e. I printed all the thread-ids I'm spawning (including the mutex._opaque[0] value each time it is entered and exited) and none of them matches the actual owner thread id of the mutex. Any idea how I can find out who its parent is? Regards, Bhaskar.
-----Original Message----- From: Sean Sprague [mailto:s...@cvok.co.uk] Sent: Thursday, October 08, 2009 4:39 PM To: Jayaraman, Bhaskar Cc: opensolaris-code@opensolaris.org; Sean Sprague Subject: Re: [osol-code] Crash in kernel code! Bhaskar, > Hi I'm getting the following crash in mutex_exit which is being done > in the kernel. > > > ::status > > debugging crash dump vmcore.0 (32-bit) from solaris-devx > > operating system: 5.11 snv_72 (i86pc) > > panic message: mutex_exit: not owner, lp=d0eb3c94 owner=f6c4f510 > thread=d0eb3de0 > > dump content: kernel pages only > > > ::stack > > vpanic(fe8ad938, fe8ad8b0, d0eb3c94, f6c4f510, d0eb3de0) > > mutex_panic+0x55(fe8ad8b0, d0eb3c94) > > mutex_vector_exit+0x2d(d0eb3c94) > > taskq_ent_free+0x2c(d0eb3c74, cd7e9240) > > taskq_thread+0x1d8(cd7ec0a8, 0) > > thread_start+8() > > I'm spawning threads in the kernel which seems to be causing this. Is > there any anything you could help me out with about what is going > wrong here? > From this stack backtrace, I guess that the answer is generically "no", and supplementally "you can always write code that can generate a panic, but please don't try too hard to do so". ICBWT. Check your code more thoroughly - this cannot really be attributed to a *Solaris (you didn't state any *Solaris release; and this is an OpenSolaris code thread) fault. Regards... Sean. Just spotted (at the last second - one year old with chicken pox is tiring me substantially) "mutex_exit: "not owner"; hmmm... Is your driver trying to modify Kernel data structures directly? The panic is from http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/os/mutex.c#517 and suggests that the current thread is not the owner of the mutex (and I can only think by some odd mod of a struct). I am waaay out of my depth here, but thought I would make a vague suggestion anyway - at least consult the source code as refrernced above. R'S. _______________________________________________ opensolaris-code mailing list opensolaris-code@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/opensolaris-code
