Subpagesize-blocksize: Allow I/O on blocks whose size is less than page size

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Hi,
What happened to the subpagesize-blocksize patchset? It seems to be untouched since 3 years. I'm currently stuck on Fedora ppc64le because it ships with a 64k page size, but I need it to be 4k in order to be able to chroot into foreign architectures (like x86_64) with qemu-user.

If I try to mount my btrfs partition with a kernel with page size set to 4k I get the following error:

sectorsize 65536 not supported yet, only support 4094

I didn't try the patchset, because it doesn't support compression and my whole fs is compressed.

It looked like an awesome work, why didn't it get merged?

Bests,
Niccolo'



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