[v4,0/3] qemu-img: rebase: Improve/optimize rebase operation

Message

Sam Eiderman May 23, 2019, 3:44 p.m. UTC

This patch series aims to improve the speed of qemu-img rebase.

  1. Mainly by removing unnecessary reads when rebasing on the same
     chain.
  2. But also by minimizing the number of bdrv_open calls rebase
     requires.

v2:

* Added missing g_free in
  "qemu-img: rebase: Reuse in-chain BlockDriverState"

v3:

* Rebased on top of "Allow rebase with no input base" series

v4:

* Using backing_bs(bs) when a prefix was detected since bs was
  already checked for allocation.

Sam Eiderman (3):
  qemu-img: rebase: Reuse parent BlockDriverState
  qemu-img: rebase: Reduce reads on in-chain rebase
  qemu-img: rebase: Reuse in-chain BlockDriverState

 qemu-img.c | 85 ++++++++++++++++++++++++++++++++++++++++----------------------
 1 file changed, 55 insertions(+), 30 deletions(-)