Re: [RFC v2 00/10] bdev: LBS devices support to coexist with buffer-heads

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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...


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