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On Sep 29, 2011 6:55 AM, "Dale" <rdalek1967@×××××.com> wrote: |
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> |
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> Mark Knecht wrote: |
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>> |
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>> Hi, |
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>> For the first time in a couple of years I had a total hard hang |
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>> today when a Virtualbox VM was doing some updates to M$ Office. The |
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>> compute server was completely alive& then completely hung. The mouse |
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>> wouldn't move, I couldn't switch to the console and I couldn't log in |
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>> from another machine. I tried Alt-Ctrl-SysRq REISUB but there was no |
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>> response to that either so I went with a hard reset and did some |
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>> fsck's to ensure everything was OK. (It was...) After bringing the |
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>> machine back up I tested that the Magic SysRq worked, and it did, so |
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>> the hang was hard enough to stop even that. |
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>> |
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>> My question about this is what's your guess about where the hang |
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>> occurred? Was it purely in the kernel and I just hit some corner |
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>> condition that caused it? Or could it be that a hang in the VM could |
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>> completely bring the machine to a halt such that the kernel never |
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>> gains control even after waiting 15 minutes? |
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>> |
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>> The kernel was gentoo-sources-3.0.4, not the -r1 that came out today. |
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>> |
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>> Looking forward to all ideas. |
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>> |
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>> Cheers, |
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>> Mark |
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>> |
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>> |
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> |
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> Well, I had a weird one a while back that caused this sort of issue. It |
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turned out that one of my hard drives was having a file system issue. I put |
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a new file system on it, it works fine ever since. Weird but real. |
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> |
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> That said, if the kernel itself locks up, the SysReq keys may not work. I |
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have found that if you can't ssh in or get the SysReq keys to work, it is |
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what I call a hard lock up. Hitting the reset button or pulling the plug is |
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the only option I know of. |
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> |
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> You can set it so that it will reboot automatically when it locks up. |
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Thing is, if the lock up is severe enough, that may not work either. Same |
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as the SysReq keys I guess. |
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> |
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> Having the option to use SysReq keys are nice but sometimes even that |
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doesn't work. It would be nice if one could cross their fingers when using |
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those. I have to use both hands to press mine. Does crossing toes help? |
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lol |
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|
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Naaah. It *must* be the fingers of your hands. Employ your little finger and |
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thumb, freeing the index and middle to do the all-important crossing... |
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|
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;-) |
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|
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Rgds, |
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