Merge tag 'dirtylimit-dirtyrate-pull-request' of https://github.com/newfriday/qemu...

Merge tag 'dirtylimit-dirtyrate-pull-request' of https://github.com/newfriday/qemu into staging

Dirtylimit and dirtyrate 20230829 patches PULL request

Correct memory leaks in dirtylimit and accuracy losses in
dirtyrate, respectively; make minor corrections to overshoot
and memory deallocation.

This is v3 with a signed tag. Please apply.

Thanks, Yong.

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* tag 'dirtylimit-dirtyrate-pull-request' of https://github.com/newfriday/qemu:
  migration/dirtyrate: Fix precision losses and g_usleep overshoot
  softmmu/dirtylimit: Convert free to g_free
  softmmu: Fix dirtylimit memory leak

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>