Anton Shterenlikht wrote: >>> 4) I have the following in my 7-stable kernel >>> The long and the short of it is I don't get any dumps. >>> I read somewhere that you can't dump onto a gmirror device. >>> >> That is incorrect, but I don't know the cause of your problem. I run >> nothing but gmirror and dumps happen here. >> > I was also told that > "you won't get a valid dump if your dumpdev > is on a GEOM_MIRROR device" > On 7.x, you have a 'legal' way to run gmirror -v prefer before savecore is run. In -current, the corresponding rc file (alas, I forgot its name) is removed. I tried adding "gmirror -v prefer /dev/mirror0" to savecore rc.d file, but to no such luck. The problem here is the order of startup for the drives inside the mirror; the first drive in the array that started during the boot when the panic occurred has to be the preferred device during savecore - and when this condition is met, you will get a valid dump. i.e. let's assume that the system boots like GEOM_MIRROR: Device gm0: provider ada0 detected. GEOM_MIRROR: Device gm0: provider ada0 activated. GEOM_MIRROR: Device gm0: provider ada1 detected. GEOM_MIRROR: Device gm0: provider ada1 activated. GEOM_MIRROR: Device gm0: provider mirror/mirror0 launched. This makes us think that ada0 is the first drive to launch. Therefore, it's the drive where the dump will be saved during a panic. So we add gmirror configure -v prefer /dev/mirror/mirror0 /dev/ada0 (correct my syntax if I'm wrong here; tried it a month ago) to /etc/rc.d/savecore right before the savecore call. We do stuff, configure, build kernels, rebuild 'em, etc, reboot, and the system comes up GEOM_MIRROR: Device gm0: provider ada1 detected. GEOM_MIRROR: Device gm0: provider ada1 activated. GEOM_MIRROR: Device gm0: provider ada0 detected. GEOM_MIRROR: Device gm0: provider ada0 activated. GEOM_MIRROR: Device gm0: provider mirror/mirror0 launched. without us noticing. And that's it; if it panics now, savecore won't save the crash dump because ada0 doesn't have it. -- Kamigishi Rei KREI-RIPEReceived on Fri Jul 31 2009 - 06:56:03 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:39:53 UTC