Re: [PATCH 1/2] btrfs: remove the alignment check in end_bbio_data_write()

[David Sterba <dsterba@suse.cz>]

On Tue, Mar 03, 2026 at 06:45:09PM +1030, Qu Wenruo wrote:
> The check is not necessary because:
> 
> - There is already assert_bbio_alignment() at btrfs_submit_bbio()
> 
> - There is also btrfs_subpage_assert() for all btrfs_folio_*() helpers
> 
> - No similar check in all other endio functions
>   No matter if it's data read, compressed read or write.
> 
> - There is no such report for very long
>   I do not even remember if there is any such report.

Going back in history the first warning was added in 2013 commit
17a5adccf3fd01 ("btrfs: do away with non-whole_page extent I/O") and
then refactored a few times. The changelog says

"   I've replaced the whole_page computations with warnings, just to be
    sure that we're not issuing partial page reads or writes.  The
    warnings should probably just go away some time."

I've checked my old logs, no hits and neither on a general web search so
this counts as safe to remove.