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Re: [Xen-devel] segfault in VM

On Jul 19, 2004, at 1:50 AM, James Harper wrote:

where file3 and file4 are around 300mb files, and the vm has 128mb of memory with no swap. This ensures that none of the file is cached so there's lots of I/O.
When i've seen it crash most readily has been when i'm running a few other domains and then start running dom0 out of memory, but nothing conclusive yet.
I'll let this test keep running for another hour (otherwise idle, no other domains running) or so then start my running-out-of-memory program.

similarly, I can reproduce it reasonably reliably if I wait until all the VMs are busy either doing I/o or high CPU utilization and then I start dom0 doing lots of I/o either through an rsync or something along those lines. If I let the system run for a little while to "prime" it, so far I think I can pretty much crash it whenever I want.

I wonder if it is coincidence that we both have smp boxes... each of the domains only sees 1 cpu so I wouldn't have thought that would be a problem unless there's a race in xen itself.

I have another, single-CPU, box that I can play with that I'll try to get to building and deploying Xen tonight and see if it makes any difference.

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