Kevin Wolf wrote: > Am 07.12.2009 15:50, schrieb Jan Kiszka: >> Jan Kiszka wrote: >>> And now it happened again (qemu-kvm head, during kernel installation >>> from network onto local qcow2-disk). Any clever idea how to proceed with >>> this? >>> >>> I could try to run the step in a loop, hopefully retriggering it once in >>> a (likely longer) while. But then we need some good instrumentation first. >>> >> Maybe I'm seeing ghosts, and I don't even have a minimal clue about what >> goes on in the code, but this looks fishy: >> >> preallocate() invokes qcow2_alloc_cluster_offset() passing &meta, a >> stack variable. It seems that qcow2_alloc_cluster_offset() may insert >> this structure into cluster_allocs and leave it there. So we corrupt the >> queue as soon as preallocate() returns, no? > > preallocate() is about metadata preallocation during image creation. It > is only ever run by qemu-img. Apart from that it calls > run_dependent_requests() which removes the request from the list again. OK, I see - was far too easy anyway. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
