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Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/1459.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/1459.toml | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/1459.toml b/gitlab/issues/target_missing/host_missing/accel_missing/1459.toml new file mode 100644 index 00000000..24fa0b51 --- /dev/null +++ b/gitlab/issues/target_missing/host_missing/accel_missing/1459.toml @@ -0,0 +1,43 @@ +id = 1459 +title = "analyze-migration.py doesn't account for saved blocks" +state = "opened" +created_at = "2023-01-23T23:45:30.101Z" +closed_at = "n/a" +labels = ["Migration"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/1459" +host-os = "Linux" +host-arch = "N/A" +qemu-version = "7.x" +guest-os = "n/a" +guest-arch = "n/a" +description = """""" +reproduce = """1. Make a migration snapshot that includes incremental block device (from HMP: `migrate -i "exec: cat > snap"`) +2. Load the snapshot: `scripts/analyze-migration.py -f snap` + + +``` +Traceback (most recent call last): + File "scripts/analyze-migration.py", line 605, in <module> + dump.read(dump_memory = args.memory) + File "scripts/analyze-migration.py", line 539, in read + classdesc = self.section_classes[section_key] +KeyError: ('block', 0) +```""" +additional = """Here's pseudocode derived from `block_load` in `migration/block.c`: + +``` +N blocks of the following: + + read 64 bits: sector number and flags + (blk->sector << BDRV_SECTOR_BITS) | flags + + if flags & BLK_MIG_FLAG_EOS: + break + if flags & BLK_MIG_FLAG_PROGRESS + continue + if flags & BLK_MIG_FLAG_DEVICE_BLOCK + byte: name length + length bytes: device name string + if not flags & BLK_MIG_FLAG_ZERO_BLOCK: + read (1 << 20) bytes +```""" |