[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xenstored crashes with SIGSEGV
Hello, On 16.12.2014 11:45, Ian Campbell wrote: > On Mon, 2014-12-15 at 23:29 +0100, Philipp Hahn wrote: >>> I notice in your bugzilla (for a different occurrence, I think): >>>> [2090451.721705] univention-conf[2512]: segfault at ff00000000 ip >>>> 000000000045e238 sp 00007ffff68dfa30 error 6 in python2.6[400000+21e000] >>> >>> Which appears to have faulted access 0xff000000000 too. It looks like >>> this process is a python thing, it's nothing to do with xenstored I >>> assume? >> >> Yes, that's one univention-config, which is completely independent of >> xen(stored). >> >>> It seems rather coincidental that it should be accessing the >>> same sort of address and be faulting. >> >> Yes, good catch. I'll have another look at those core dumps. > > With this in mind, please can you confirm what model of machines you've > seen this on, and in particular whether they are all the same class of > machine or whether they are significantly different. They are all from the same vendor, but I have to check the individual models and firmware versions, which might take some time. > The reason being that randomly placed 0xff values in a field of 0x00 > could possibly indicate hardware (e.g. a GPU) DMAing over the wrong > memory pages. Good catch: that would explain why it only happens for us and no one other has seen that strange bug before. Thanks you again. Philipp Hahn _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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