On Fri, 29 Jul 2016 22:57:36 +0000, Holger Hoffstätte wrote:

The only other patch I just found missing and which looks like it
could/should (I think?) work on top of the 4.4.x pagesize-based
calculations in file.c is:

a2af23b7 "__btrfs_buffered_write: Pass valid file offset when
releasing delalloc space"

Would that make sense?

No it wouldn't, not without some other sectorsize-related patches
that came before...and those would just make matters worse.

So forget the above.

-h