Date: Thu, 29 May 2003 17:37:19 -0400 (EDT) From: Bryan Liesner <bleez@verizon.net> To: Julian Elischer <julian@elischer.org> Cc: freebsd-current@freebsd.org Subject: Re: panic: kern/52718 Message-ID: <20030529173249.K880@gravy.homeunix.net> In-Reply-To: <Pine.BSF.4.21.0305291408410.47588-100000@InterJet.elischer.org> References: <Pine.BSF.4.21.0305291408410.47588-100000@InterJet.elischer.org>
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On Thu, 29 May 2003, Julian Elischer wrote:
> without the correct keywords in your mail, it's unlikely either
> the CAM or Mutex people would see it before then....
>
Here's a copy of my original mail, which was pretty much ignored, with
the exception of Terry Lambert. I feel that the subject was pretty
clear. If it wasn't clear enough, then I stand corrected.
Date: Mon, 26 May 2003 12:11:35 -0400 (EDT)
From: Bryan Liesner <bleez@verizon.net>
To: freebsd-current@freebsd.org
Subject: panic since changes to kern_umtx.c
The change from kern_umtx.c rev 1.2 to 1.3 brought out the following
panic on my system. The panic does not occur if I revert back to 1.2
or if I turn off my USB hard drive (uses EHCI) and run with rev 1.3
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0135b0a7
stack pointer = 0x10:0xd68f2c48
frame pointer = 0x10:0xd68f2c64
code segment = base 0x0 limit 0xffff, type 0x1b
processor eflags = interrupt enabled, resume, IOPL=0
current process = 12 (swi7: tty:sio clock)
trap number = 12
panic page fault
DDB says it was in heap_up+0x27
...
(kgdb) l *heap_up+0x27
0xc0136be7 is in heap_up (../../../cam/cam_queue.c:345).
340 * equal too, or greater than j respectively.
341 */
342 static __inline int
343 queue_cmp(cam_pinfo **queue_array, int i, int j)
344 {
345 if (queue_array[i]->priority == queue_array[j]->priority)
346 return ( queue_array[i]->generation
347 - queue_array[j]->generation );
348 else
349 return ( queue_array[i]->priority
(kgdb)
350 - queue_array[j]->priority );
351 }
352
353 /*
354 * swap: Given an array of cam_pinfo* elements and indexes i and j,
355 * exchange elements i and j.
356 */
357 static __inline void
358 swap(cam_pinfo **queue_array, int i, int j)
359 {
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