Il 26-02-2018 21:29 Amir Goldstein ha scritto:
I was also expecting dirty data to be lost, but according to Darrick
that is
not the case for page cache dirty data, although in all likelyhook,
your VM
is using direct IO to write to image file.
Yeah, it was better than expected. For some VM I use Qemu/KVM writeback
policy rather than "none"/O_DIRECT, so the fact that host-side dirty
data will not be lost when reflinking is a pleasant surprise.
I think your use case is interesting and this is definitely the right
place
to ask these questions.
Great ;)
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Danti Gionatan
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