[Bug 224522] New: modprobe mdacon freezes machine
https://bugzilla.novell.com/show_bug.cgi?id=224522 Summary: modprobe mdacon freezes machine Product: openSUSE 10.2 Version: RC 3 Platform: i386 OS/Version: Other Status: NEW Severity: Blocker Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: tarnold@novell.com QAContact: qa@suse.de loading kernelmodule mdacon causes a freeze on i386. found on quake13.suse.de and nunez.suse.de -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=224522 ------- Comment #1 from tarnold@novell.com 2006-11-29 08:48 MST ------- dmesg: mdacon: MDA with 8K of memory detected. Console: switching consoles 1-16 to mono MDA-2 80x25 /var/log/messages: Nov 29 10:31:21 linux-2yud kernel: mdacon: MDA with 8K of memory detected. Nov 29 10:31:21 linux-2yud kernel: Console: switching consoles 1-16 to mono MDA-2 80x25 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=224522 ------- Comment #2 from tarnold@novell.com 2006-11-29 08:49 MST ------- note: ssh still works -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=224522 aj@novell.com changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|Blocker |Critical ------- Comment #3 from aj@novell.com 2006-11-29 11:54 MST ------- mdacon is not a blocker. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=224522 lmb@novell.com changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|Critical |Major ------- Comment #5 from lmb@novell.com 2007-01-02 05:27 MST ------- Does the system really still have an mda card? I somehow doubt it. If not, loading random drivers might not be a good idea. Does it get loaded automatically, or are you loading it manually? If so, loading random drivers might not be a good idea. ;-) We should switch the module to "unsupported", that should take care of it. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=224522 ------- Comment #6 from lmb@novell.com 2007-01-09 10:56 MST ------- Tim? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=224522 ------- Comment #7 from tarnold@novell.com 2007-01-09 11:16 MST ------- Oh Sorry. I didn't realize your last post. I don't think that these machines have a mda card. The problem appeared during one of our standard kerneltests. A little script which detects available kernelmodules and loads and unloads all of them. It only checks whether module loading works fine. It is not an error, if a module can't be loaded due to missing hardware, but I think no machine (or its ttys) should freeze because of loading the wrong module. Have a look at the script: /suse/rd-qa/rd-qa-kernel/misc/try_modules.sh -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=224522 gregkh@novell.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |RESOLVED Info Provider|tarnold@novell.com | Resolution| |WONTFIX ------- Comment #8 from gregkh@novell.com 2007-01-09 19:30 MST ------- Tim, In theory, yes, the kernel should be able to handle loading and unloading any possible module. In reality, we don't, as you have found out. This is just a fact of life for now, and unless we want to take on a lot of engineering resources just to fix up these issues, it is not going to be fixed. Especially as these are issues that have been known by the core kernel developers for a very long time, and the fact that no customer ever sees these problems. If you want, I would suggest that you log these kinds of things against the upstream kernel.org kernel by filing bugs at bugzilla.kernel.org so that maybe the issues do get fixed and we will pull them in automatically for the next release. So, because of this, I'm going to close this bug out. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
https://bugzilla.novell.com/show_bug.cgi?id=224522 User roland.kletzing@materna.de added comment https://bugzilla.novell.com/show_bug.cgi?id=224522#c9 roland kletzing <roland.kletzing@materna.de> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |roland.kletzing@materna.de --- Comment #9 from roland kletzing <roland.kletzing@materna.de> 2008-05-03 05:14:45 MST --- i also came across this several times and it`s an annoyance to some degree. yes,randomly loading/unloading driver modules may sometimes give strange results, but i think it`s a matter of quality: a hardware driver module should not detect something that isn`t there - and it also shouldn`t mess up anything, if the appropriate hardware doesn`t exist. yes, probing hardware can be dangerous and can go wrong....
This is just a fact of life for now, and unless we want to take on a lot of engineering resources just to fix up these issues, it is not going to be fixed.
i`d don`t know if it really takes that much ressources and if it isn`t worth fixing it, though. i`m doing module/load unload tests on a regular basis and catch the one or other bug/oops with that, but from more than 2000 modules there are really really few, which actually seem to mess up something. i hardly can remember, which ones, actually i only know two: mdacon and cfag12864bfb actually, i`m trying to get the mdacon issue fixed. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=224522 User roland.kletzing@materna.de added comment https://bugzilla.novell.com/show_bug.cgi?id=224522#c10 --- Comment #10 from roland kletzing <roland.kletzing@materna.de> 2008-05-04 13:46:07 MST --- fix available at http://bugzilla.kernel.org/show_bug.cgi?id=9822 if somebody likes getting this merged upstream, please help pushing it -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=224522 User roland.kletzing@materna.de added comment https://bugzilla.novell.com/show_bug.cgi?id=224522#c11 --- Comment #11 from roland kletzing <roland.kletzing@materna.de> 2008-05-10 05:12:59 MST --- it`s in -mm now: http://userweb.kernel.org/~akpm/mmotm/broken-out/mdacon-messing-up-default-v... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=224522 User gregkh@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=224522#c12 --- Comment #12 from Greg Kroah-Hartman <gregkh@novell.com> 2008-05-12 09:39:55 MST --- Great, then it will get into our tree for 11.1, thanks for doing this. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=224522 User roland.kletzing@materna.de added comment https://bugzilla.novell.com/show_bug.cgi?id=224522#c13 --- Comment #13 from roland kletzing <roland.kletzing@materna.de> 2008-08-02 11:31:35 MDT --- fyi, my patch has been merged upstream, so the issue is fixed automatically when 2.6.27 is out. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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