On Tue, 3 Apr 2001, Simon Kirby wrote: > Three times now I've had 2.4.3 freeze on my dual CPU box while doing a > "dd if=/dev/zero of=/dev/hdc bs=1024k" (a drive to be RMA'd :)). I got > bored and opened an rxvt, and as the machine was swapping in (I assume), > everything froze. The mouse still moved for about 5 seconds before the > freeze, and the window was visible as it was attempting to start tcsh. > > I'm guessing that what's happening is something is waiting on a lock and > blocking interrupts (?) for five seconds while it is swapping in, and the > NMI lockup detector is kicking in and really breaking it. I've noticed the same thing. I was doing a rather sadistic test, checking a memory chip. one window: make -j in 2.4.2 src; and in another, dd if=/dev/hda of=/dev/null bs=4096k. The third window was running top, and froze. A fourth window wouldn't get past login: -- -- John E. Jasen ([EMAIL PROTECTED]) -- In theory, theory and practise are the same. In practise, they aren't. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/