Messages in this thread | | | Date | Wed, 12 Feb 2003 13:56:58 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: Panic `cat /proc/ioports` |
| |
On Wed, 12 Feb 2003, Randy.Dunlap wrote:
> On Wed, 12 Feb 2003 09:22:24 -0800 > Andrew Morton <akpm@digeo.com> wrote: > > | "Richard B. Johnson" <root@chaos.analogic.com> wrote: > | > > | > On Tue, 11 Feb 2003, Andrew Morton wrote: > | > > | > > "Richard B. Johnson" <root@chaos.analogic.com> wrote: > | > > > > | > > > Linux version 2.4.18, after it runs for a few days, will panic > | > > > if I do `cat /proc/ioports`. Has this been reported/fixed in > | > > > later versions? > | > > > > | > > > : Unable to handle kernel paging request at virtual address d48e2fa0 > | > > > | > > This means that some driver which was previously loaded forgot to do a > | > > release_region(). Later, the /proc code tries to read stuff from within the > | > > driver which isn't there any more and oopses. > | > > > | > > | > Yes. I just noticed that most network board drivers in version 2.4.18 > | > do not execute release_region() after they have done a request_region(), > | > if they fail to install because of some error. > | > | Fairly common error. > | > | > The error in this case was > | > the failure to allocate memory because I told the kernel I only had 4 > | > megabytes (exprimental ioremap() of the rest in another module). > | > > | > Is somebody fixing these drivers (do you know). > | > | There is ongoing janitorial work, and things are getting better. > | But I'm not aware of anyone specifically auditing for missing > | release_region()s. And given that it is a box-killer rather than > | just a memory leak, yes, it is worth an audit. > > Dick, > Did you ever determine which driver (or module) was causing this problem? >
Yes! pcnet32 to start. Practically all the network drivers end up doing this if they fail somewhere in the initialization. I didn't get a chance to look at others. I got called away for a "work break".
Cheers, Dick Johnson Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips). Why is the government concerned about the lunatic fringe? Think about it.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |