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+++ This bug was initially created as a clone of Bug #1414049 +++

Description of problem:
At the moment qemu-img allows you to specify how image file should be allocated during creation, using 'preallocation' option. Onr of possible choices is using 'falloc' option to fully allocate image file using fallocate(2) call.

Unfortunately, resize operation only supports sparse resizing and there is no way to preallocate new disk space during resize operation. 

It would be nice, if qemu-img will support preallocation during resize with fallocate(2) and, possibly, some fallback preallocation method.

Hi Max,

As the flag rhel-7.4.0? is set, qe wonder to know whether the issue will be fixed in rhel 7.4? Then qe can add it to RHEL 7.4 test plan for disk format. Thanks.

Hi pingl,

I'm most certainly working on getting it into 7.4. Considering that the development phase ends on March 28 and upstream qemu is currently occupied with preparing the 2.9 release, it may very well slip to 7.5, however.
So I cannot give a definite response but if I had to decide I would guess it won't make it into 7.4 (since it's an RFE).


Max