Re: [PATCH] btrfs: write-protect folios during data writeback

On Thu, Jul 09, 2026 at 03:08:49PM +0930, Qu Wenruo wrote:
> Just to mention, we can workaround the problem, by extracting the real work
> of btrfs_invalidate_folio() into a helper, with a bool parameter to indicate
> if we're called from the writeback path.
> 
> Then we would have a better chance to rever to folio_clear_dirty_for_io(),
> but there could be other things involved.
> So I'm totally fine with the current hot fix, but eventually we will still
> revert back to folio_clear_dirty_for_io(), to align the code to iomap.

This has nothing to do with iomap.  Normally the dirty clearing is done
by the generic code in mm/page-writeback.c.  Gettind btrfs to use that
instead of the horribly outdated forked version would be a really good
thing.