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Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/performance/322602')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/performance/322602 | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/performance/322602 b/results/classifier/deepseek-2-tmp/output/performance/322602 deleted file mode 100644 index bc21babb..00000000 --- a/results/classifier/deepseek-2-tmp/output/performance/322602 +++ /dev/null @@ -1,16 +0,0 @@ - -Snapshot usage makes qcow2 image unusable due to large tables - -To reproduce with 0.9.1 and svn: -- Create a 20G (or some size much greater than system RAM) qcow2 image -- Inside VM, install some OS, formatting whole drive -- Create snapshot with savevm -- Inside VM, reformat and reinstall OS -- Create snapshot with savevm -[...] - -Eventually, qemu crashes, then neither qemu-img nor qemu can open the image because memory is exhausted. The reason is that the whole refcount_table is loaded into memory, and this refcount_table has now become much bigger than the size of memory. - -The refcount_table really needs to be loaded and used in fixed size chunks to avoid this problem. - -Alternatively, there needs to be a way to "rollback" a snapshot without loading the whole disk image normally, so that a snapshot which has made the image unusable in this way can be reversed. \ No newline at end of file |