Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster

[Alberto Garcia]

On Mon 17 Aug 2020 05:53:07 PM CEST, Kevin Wolf wrote:
> Maybe the difference is in allocating 64k at once instead of doing a
> separate allocation for every 4k block? But with the extent size hint
> patches to file-posix, we should allocate 1 MB at once by default now
> (if your test image was newly created). Can you check whether this is
> in effect for your image file?

Ehmm... is that hint supported in ext4 or only in xfs?

Berto