[Qemu-devel] [PATCH 0/2] use blk_pwrite_zeroes for each zero cluster

[jemmy858585]

From: Lidong Chen <address@hidden>

BLOCK_SIZE is (1 << 20), qcow2 cluster size is 65536 by default,
this maybe cause the qcow2 file size is bigger after migration.
This patch check each cluster, use blk_pwrite_zeroes for each
zero cluster.

Lidong Chen (2):
  block: make bdrv_get_cluster_size public
  migration/block: use blk_pwrite_zeroes for each zero cluster

 block/io.c            |  2 +-
 include/block/block.h |  1 +
 migration/block.c     | 34 ++++++++++++++++++++++++++++++++--
 3 files changed, 34 insertions(+), 3 deletions(-)

-- 
1.8.3.1