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To:     linux-btrfs@vger.kernel.org
Subject: Subpagesize-blocksize: Allow I/O on blocks whose size is less than  page size
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Date:   Tue, 17 Sep 2019 10:31:04 +0200
From:   =?UTF-8?Q?Niccol=C3=B2_Belli?= <darkbasic@linuxsystems.it>
Cc:     Chandan Rajendra <chandan@linux.vnet.ibm.com>
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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'