[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [xen-unstable test] 16788: regressions - FAIL
>>> On 04.03.13 at 18:14, Tim Deegan <tim@xxxxxxx> wrote: > At 16:34 +0000 on 04 Mar (1362414893), Jan Beulich wrote: >> So apparently xl doesn't set the shadow size early enough, as by >> the time domain creation fails, I can't observe any invocation of >> shadow_domctl(), i.e. also not libxl__arch_domain_create()'s >> XEN_DOMCTL_SHADOW_OP_SET_ALLOCATION. > > Hmmm. libxl__arch_domain_create() seems to be called from > domcreate_attach_pci(), of all places -- oh, because the whole > process is a series of tail-calls -- and that's very late in > domain build. I'm pretty sure xend allocated shadow RAM up front. While I having looked at this last must date back a couple of years, I'm also relatively certain that xend did this earlier. > Or maybe we're only now getting to see VMs big enough that this is a > problem. Less likely. But presumably the test system should be using bigger guests, or have a case of a bigger guest added? Ian - any chance you could look into both the xl and the test suite aspects? >> That's all very unsatisfying, the more with the failure not easily >> being recognizable as an out of (shadow) memory related one. > > How annoying. I'll add at least a one-time console warning and look > into some more sensible error propagation Thanks! >> And in the end, Tim, it doesn't look like Linux HVM guests exercise >> the cross-page-boundary emulation path, so I can't really test the >> code. Shall I put it in nevertheless, or would you be able to give >> this a go beforehand? > > Unfortunately there's no chance I can do any testing this week before > Thursday. I think the patch should go in anyway -- it's not going to > make the situation any worse for VMs that do hit that path. Okay, committed - after having sent the mail I too realized that having the patch in won't make matters worse. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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