On Fri, Sep 15, 2023 at 10:51:12PM +0100, Matthew Wilcox wrote: > On Fri, Sep 15, 2023 at 02:32:44PM -0700, Luis Chamberlain wrote: > > However, an issue is that disabling CONFIG_BUFFER_HEAD in practice is not viable > > for many Linux distributions since it also means disabling support for most > > filesystems other than btrfs and XFS. So we either support larger order folios > > on buffer-heads, or we draw up a solution to enable co-existence. Since at LSFMM > > 2023 it was decided we would not support larger order folios on buffer-heads, > > Um, I didn't agree to that. If block size is equal to folio size, there > are no problems supporting one buffer head per folio. In fact, we could > probably go up to 8 buffer heads per folio without any trouble (but I'm > not signing up to do that work). Patches welcomed for buffer-head larger order folio support :) But in the meantime... Luis
