On 11/04/2017 15:57, Kevin Wolf wrote: > Am 11.04.2017 um 15:35 hat 858585 jemmy geschrieben: >> Hi Kevin: >> Can you provide some information about the original bug which you want >> fix? >> >> the original comment: >> Usually guest devices don't like other writers to the same image, so >> they use blk_set_perm() to prevent this from happening. >> >> i don't find where the dest qemu will use blk_set_perm during migration. >> but after apply this patch, blkconf_apply_backend_options don't update the >> blk->root->perm. > > Do I understand correctly that this is not simply live migration, but > block live migration (with 'migrate -b')? > > Can you please post a backtrace not of the successful case, but of the > failing assertion?
Kevin, I've also reproduced this problem without the block live migration while I was testing my patch to fix the virtio-rng migration. Laurent
