On Fri, Aug 05, 2005 at 01:45:55PM +0200, Andi Kleen wrote: > John B?ckstrand <[EMAIL PROTECTED]> writes: > > > I've been trying to hunt down a hard lockup issue with some hardware > > of mine, but I've possibly hit a kernel bug instead. When using > > netconsole on my e1000, if I unplug the cable and then re-plug it, the > > machine locks up hard. It manages to print the "link up" message on > > the screen, but nothing after that. Now, I wonder if this is supposed > > to be so? I tried this on 4 different configurations, 2.6.13-rc5 and > > 2.6.12 with and without "noapic acpi=off", same result on all of > > them. I've tried with 1 and 3 other NICs in the machine at the same > > time. > > I ran into the same problem some time ago on e1000. The problem was > that if the link doesn't come up netconsole ends up waiting forever > for it.
I still don't like this fix. Yes, you're right, it should eventually give up. But here it gives up way too easily - 5 could easily translate to 5 microseconds. This is analogous to giving up on serial transmit if CTS is down for 5 loops. I'd be much happier if there were some udelay or the like in here so that we're not giving up on such a short timeframe. -- Mathematics is the supreme nostalgia of our time. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
