From: Gordon W. <gor...@gm...> - 2007-11-30 22:13:54
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I'm running my home directories off a custom fuse filesystem backed by NFS volumes and I've recently upgraded from debian sarge to ubuntu 7.10. Since the upgrade I've started experiencing freezes, where the whole of X just stops for anything from a minute or so right up to 15-20 minutes and then resumes as if nothing ever happened. If I switch to another virtual terminal during a freeze I can't even log in. However if I have a root account logged in on an alternate virtual terminal it keeps working fine, running top there shows the CPU 100% idle with stacks of free Memory. Running the fuse filesystem with debug in another virtual terminal shows no particular pattern at all. However running of a local copy seems to get rid of the problem, although it comes and goes a bit so it's hard to say for sure. What I'm after at this point is ideas on where to look for further debug info during the freezes, for example is there a way I can tell what processes are blocking and what they are blocking on? what processes have what files open etc thanks Gordon |
From: Miklos S. <mi...@sz...> - 2007-12-03 11:27:36
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> I'm running my home directories off a custom fuse filesystem backed by > NFS volumes and I've recently upgraded from debian sarge to ubuntu > 7.10. Since the upgrade I've started experiencing freezes, where the > whole of X just stops for anything from a minute or so right up to > 15-20 minutes and then resumes as if nothing ever happened. If I > switch to another virtual terminal during a freeze I can't even log > in. However if I have a root account logged in on an alternate virtual > terminal it keeps working fine, running top there shows the CPU 100% > idle with stacks of free Memory. Running the fuse filesystem with > debug in another virtual terminal shows no particular pattern at all. > However running of a local copy seems to get rid of the problem, > although it comes and goes a bit so it's hard to say for sure. > > What I'm after at this point is ideas on where to look for further > debug info during the freezes, for example is there a way I can tell > what processes are blocking and what they are blocking on? what > processes have what files open etc What is the kernel version? Can you try pressing Alt-SysRq-T during the freeze, and send the dmesg output? Thanks, Miklos |