linux-kernel - Re: [PATCH 06/19] writeback: Factor out writeback

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Date: Tue, 30 Jan 2024 15:04:59 +0100
From: Christoph Hellwig <hch@....de>
To: Brian Foster <bfoster@...hat.com>
Cc: Christoph Hellwig <hch@....de>, linux-mm@...ck.org,
	Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.com>,
	David Howells <dhowells@...hat.com>,
	Christian Brauner <brauner@...nel.org>,
	"Darrick J. Wong" <djwong@...nel.org>, linux-xfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jan Kara <jack@...e.cz>, Dave Chinner <dchinner@...hat.com>
Subject: Re: [PATCH 06/19] writeback: Factor out writeback_finish()

On Mon, Jan 29, 2024 at 03:13:47PM -0500, Brian Foster wrote:
> > @@ -2481,6 +2500,9 @@ int write_cache_pages(struct address_space *mapping,
> >  				folio_unlock(folio);
> >  				error = 0;
> >  			}
> > +		
> 
> JFYI: whitespace damage on the above line.

Thanks, fixed.

> 
> > +			if (error && !wbc->err)
> > +				wbc->err = error;
> >  
> 
> Also what happened to the return of the above "first error encountered"
> for the WB_SYNC_ALL case? Is that not needed for some reason (and so the
> comment just below might require an update)?

No, this got broken during the various rebases (and is fixed again later
in the series).  We need to return wbc->err from write_cache_pages at
this stage, I'll fix it.