On Thu, 2015-10-08 at 12:29 +0100, Tomas Elf wrote: > > Could someone clarify what this means from the TDR point of view, > please? When you say "context blew up" I'm guessing that you mean that > come context caused the fault handler to get involved somehow? > > Does this imply that the offending context will hang and the driver will > have to detect this hang? If so, then yes - if we have the per-engine > hang recovery mode as part of the upcoming TDR work in place then we > could handle it by stepping over the offending batch buffer and moving > on with a minimum of side-effects on the rest of the driver/GPU.
I don't think the context does hang. I've made the page-request code artificially fail and report that it was an invalid page fault. The gem_svm_fault test seems to complete (albeit complaining that the test failed). Whereas if I just don't service the page-request at all, *then* the GPU hang is detected. I haven't actually looked at precisely what *is* happening. -- dwmw2
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