Re: [PATCH v4 00/54] tree-in-dcache stuff

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Jan 27, 2026 at 08:14:54PM +0000, Al Viro wrote:
> On Tue, Jan 27, 2026 at 10:39:04AM -0800, Linus Torvalds wrote:
> > On Mon, 26 Jan 2026 at 23:42, Greg KH <gregkh@linuxfoundation.org> wrote:
> > >
> > > Note that I had to revert commit e5bf5ee26663 ("functionfs: fix the
> > > open/removal races") from the stable backports, as it was causing issues
> > > on the pixel devices it got backported to.  So perhaps look there?
> > 
> > Hmm. That commit is obviously still upstream, do we understand why it
> > caused problems in the backports?
> 
> This is all I've seen:
> 
> | It has been reported to cause test problems in Android devices.  As the
> | other functionfs changes were not also backported at the same time,
> | something is out of sync.  So just revert this one for now and it can
> | come back in the future as a patch series if it is tested.
> 
> My apologies for not following up on that one; Greg, could you give some
> references to those reports?

Sorry, all I got was a "this commit caused devices to fail" and was
found from bisection, on the 6.18.y tree.  Samuel has much more
information as to exactly what is happening here as he can see the test
results properly, I'll let him work through this, thanks!

greg k-h