Date: Sun, 14 Nov 2004 22:12:49 -0500 (EST) From: "kalin mintchev" <kalin@el.net> To: freebsd-questions@freebsd.org Subject: Re: panic: page fault Message-ID: <62167.24.90.34.93.1100488369.squirrel@el.net> In-Reply-To: <20041115022132.GA30236@xor.obsecurity.org> References: <61839.24.90.34.93.1100484272.squirrel@el.net> <20041115022132.GA30236@xor.obsecurity.org>
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> On Sun, Nov 14, 2004 at 09:04:32PM -0500, kalin mintchev wrote: >> ok... about every 6 - 7 days the machine reboots because of this: >> >> /kernel: Fatal trap 12: page fault while in kernel mode >> /kernel: fault virtual address = 0xbeff2 >> /kernel: fault code = supervisor read, page not present >> /kernel: instruction pointer = 0x8:0xc0305ed3 >> /kernel: stack pointer = 0x10:0xd7ec9e18 >> /kernel: frame pointer = 0x10:0xd7ec9e20 >> /kernel: code segment = base 0x0, limit 0xfffff, type 0x1b >> /kernel: = DPL 0, pres 1, def32 1, gran 1 >> /kernel: processor eflags = interrupt enabled, resume, IOPL = 0 >> /kernel: current process = 29374 (perl) >> /kernel: interrupt mask = net tty bio cam >> /kernel: trap number = 12 >> /kernel: panic: page fault >> >> where do i look? >> >> thanks.......... > > You forgot to mention what version of FreeBSD you're running..if it's > old, upgrade to the latest version, because bugs are located and fixed > all the time. thank you Kris. you are right. sorry. FreeBSD4.6-RELEASE well.. i'm pretty sure the problem is caused by the courier imap server. it wasn't doing it before i installed qmail and courier. the courier starts executing a command called 'ulimit' the original script uses the -v flag to the command to assign virtual memory. the thing is this bsd version ulimit doesn't support _any_ flags. when i was starting it with the flag i was getting error message that the flag is not supported and the machine was crashing after a while with a message about virtual memory problems. so i took the flag out... now it crashes with this panic... i looked under 5.2.x for the ulimit command but it's the same - no flags and only under sh. so even if i upgrade to 4.10 i won't get the -v flag for ulimit... i posted a question to the courier list about it but was told to research how ulimit works on my system and adjust the flags. not much of a help there... how can i solve this? is there another command instead of ulimit i can use for the same purpose as ulimit -v ? thanks a lot... > > Is the issue repeatable under defined conditions? Is the page fault > always the same? Either way, you'll also need to rule out hardware > failure. > > Otherwise, see the chapter on kernel debugging in the developers > handbook on the website for more information on how to obtain > necessary debugging information suitable for inclusion in a PR. > > Kris > --
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