Messages in this thread | | | Date | Fri, 6 Jan 2006 01:31:30 +0100 | From | Francois Romieu <> | Subject | Re: [2.6.13.3] occasional oops mostly in iget_locked |
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Folkert van Heusden <folkert@vanheusden.com> : [...] > Well that problem seems to be solved in 2.6.15 so does this problem > matter anymore? I'm a little hesitant to play a lot with that system as > it'll make some people really upset.
If you experience random crashes and netconsole is not able to catch anything, you want to disable netconsole and use a serial console instead (whenever possible).
I'd say that you do not want netconsole on a non-devel or production SMP machine.
Side note: even if it does not hit your system, you can probably report the sequence below to the maintainer of the zaptel module (extracted from the default branch of current cvs):
static void zt_free_pseudo(struct zt_chan *pseudo) { unsigned long flags; if (pseudo) { spin_lock_irqsave(&bigzaplock, flags); zt_chan_unreg(pseudo); [...]
static void zt_chan_unreg(struct zt_chan *chan) { [...] unregister_hdlc_device(chan->hdlcnetdev->netdev);
void unregister_hdlc_device(struct net_device *dev) { rtnl_lock();
-> sleep with spinlock held.
static int zt_ctl_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long data) { [...] spin_lock_irqsave(&chans[ch.chan]->lock, flags); #ifdef CONFIG_ZAPATA_NET if (chans[ch.chan]->flags & ZT_FLAG_NETDEV) { if (ztchan_to_dev(chans[ch.chan])->flags & IFF_UP) { spin_unlock_irqrestore(&chans[ch.chan]->lock, flags); printk(KERN_WARNING "Can't switch HDLC net mode on channel %s, since current interface is up\n", chans[ch.chan]->name); return -EBUSY; } #ifdef LINUX26 [...] #else unregister_hdlc_device(&chans[ch.chan]->hdlcnetdev->netdev);
-> same thing (btw #ifdef are not fun to review :o| )
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