Worked on the espressif/qemu repository to enhance migration stability when using compression methods such as QPL and qatzip, focusing on scenarios involving zero pages. Addressed a complex bug where migration data could become incorrect if zero and normal pages changed state during migration, which previously risked data corruption. The solution involved updating the IOV of MultiFDPacket_t and ensuring accurate recording of normal pages on the target side, thereby improving data integrity. This work required expertise in C, memory management, and system programming, and included regression considerations to strengthen reliability for production data migrations under compressed conditions.