From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A08D02E4989; Wed, 2 Jul 2025 18:25:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751480738; cv=none; b=BBwYNejfJlEfQMky+iqBeS1WS27EaxJvROLiU9oZylSH97nJ3IxYrtFtAvLR9gA4VfUYLAvczf5lvTYnPsK+R1bLURJcSEtC1LuCdtamzLW0zlTQpeMUcqnE4IaSKyovZhFCFz7m4i0VnSOwoaaJA4E0r4mfzIGCTAqBS7PJRU8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751480738; c=relaxed/simple; bh=3DFdtFbJWzbggFvCiW+KwOA87/UqxMcgEkRE2COMIlc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mLB9jAmkHCDytVlRg4Tyk8XtJLXHwGRZs5jT1tu1xsCWqf97MpdFrvrhFrofNMVx1VtkUny2LlDBRiqgzRfg822kPV3pgJmhIxJjMP33ki4OP3nATXJQKoPqiV/+qx4xCjxx0PmHLsFG5PNeqTd+Q+jT1L8Wz7wS1KbrTTDKxFs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=c/9wXhO9; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="c/9wXhO9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3C7BCC4CEE7; Wed, 2 Jul 2025 18:25:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1751480738; bh=3DFdtFbJWzbggFvCiW+KwOA87/UqxMcgEkRE2COMIlc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=c/9wXhO9iDFbWhf3d35NU2O1nCqt8WDt7/7zHhZ/VdYbFd19eQFw8Hr4LyTliCS+3 4CRk6vQSTdKr/Oa7S3jvJsnQ8SPnbrpNDUxNwRuFTpWAkM1vwqbActXRgLzMmgVaka IM4hnMnMBCYPeUt9Fo8tCycYM8cXzVyjVHZ2RpQpdYiLLkagu8SoomnsSIjuzIrWlu V+bmeNsd7XGoV7n4AoRVx9AqrcbY3LiS3VecxCRbjQ/TZ2tZXjciAd0LXeQzb1wCke X0+7bU1S9+/Vm+wSfYlNbenO6UB8DWrqQC9Y/Vd0Gsgp2kERbDnT6XLnnLvLdt6q2h P2diCt1JghHsg== Date: Wed, 2 Jul 2025 11:25:37 -0700 From: "Darrick J. Wong" To: Christoph Hellwig Cc: Christian Brauner , Joanne Koong , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, linux-block@vger.kernel.org, gfs2@lists.linux.dev Subject: Re: [PATCH 05/12] iomap: add public helpers for uptodate state manipulation Message-ID: <20250702182537.GR10009@frogsfrogsfrogs> References: <20250627070328.975394-1-hch@lst.de> <20250627070328.975394-6-hch@lst.de> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250627070328.975394-6-hch@lst.de> On Fri, Jun 27, 2025 at 09:02:38AM +0200, Christoph Hellwig wrote: > From: Joanne Koong > > Add a new iomap_start_folio_write helper to abstract away the > write_bytes_pending handling, and export it and the existing > iomap_finish_folio_write for non-iomap writeback in fuse. > > Signed-off-by: Joanne Koong > [hch: split from a larger patch] > Signed-off-by: Christoph Hellwig Looks ok, Reviewed-by: "Darrick J. Wong" --D > --- > fs/iomap/buffered-io.c | 20 +++++++++++++++----- > include/linux/iomap.h | 5 +++++ > 2 files changed, 20 insertions(+), 5 deletions(-) > > diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c > index a72ab487c8ab..d152456d41a8 100644 > --- a/fs/iomap/buffered-io.c > +++ b/fs/iomap/buffered-io.c > @@ -1535,7 +1535,18 @@ vm_fault_t iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops, > } > EXPORT_SYMBOL_GPL(iomap_page_mkwrite); > > -static void iomap_finish_folio_write(struct inode *inode, struct folio *folio, > +void iomap_start_folio_write(struct inode *inode, struct folio *folio, > + size_t len) > +{ > + struct iomap_folio_state *ifs = folio->private; > + > + WARN_ON_ONCE(i_blocks_per_folio(inode, folio) > 1 && !ifs); > + if (ifs) > + atomic_add(len, &ifs->write_bytes_pending); > +} > +EXPORT_SYMBOL_GPL(iomap_start_folio_write); > + > +void iomap_finish_folio_write(struct inode *inode, struct folio *folio, > size_t len) > { > struct iomap_folio_state *ifs = folio->private; > @@ -1546,6 +1557,7 @@ static void iomap_finish_folio_write(struct inode *inode, struct folio *folio, > if (!ifs || atomic_sub_and_test(len, &ifs->write_bytes_pending)) > folio_end_writeback(folio); > } > +EXPORT_SYMBOL_GPL(iomap_finish_folio_write); > > /* > * We're now finished for good with this ioend structure. Update the page > @@ -1668,7 +1680,6 @@ ssize_t iomap_add_to_ioend(struct iomap_writeback_ctx *wpc, struct folio *folio, > loff_t pos, loff_t end_pos, unsigned int dirty_len) > { > struct iomap_ioend *ioend = wpc->wb_ctx; > - struct iomap_folio_state *ifs = folio->private; > size_t poff = offset_in_folio(folio, pos); > unsigned int ioend_flags = 0; > unsigned int map_len = min_t(u64, dirty_len, > @@ -1711,8 +1722,7 @@ ssize_t iomap_add_to_ioend(struct iomap_writeback_ctx *wpc, struct folio *folio, > if (!bio_add_folio(&ioend->io_bio, folio, map_len, poff)) > goto new_ioend; > > - if (ifs) > - atomic_add(map_len, &ifs->write_bytes_pending); > + iomap_start_folio_write(wpc->inode, folio, map_len); > > /* > * Clamp io_offset and io_size to the incore EOF so that ondisk > @@ -1880,7 +1890,7 @@ static int iomap_writepage_map(struct iomap_writeback_ctx *wpc, > * all blocks. > */ > WARN_ON_ONCE(atomic_read(&ifs->write_bytes_pending) != 0); > - atomic_inc(&ifs->write_bytes_pending); > + iomap_start_folio_write(inode, folio, 1); > } > > /* > diff --git a/include/linux/iomap.h b/include/linux/iomap.h > index b65951cdb0b5..1a07d8fa9459 100644 > --- a/include/linux/iomap.h > +++ b/include/linux/iomap.h > @@ -460,6 +460,11 @@ void iomap_sort_ioends(struct list_head *ioend_list); > ssize_t iomap_add_to_ioend(struct iomap_writeback_ctx *wpc, struct folio *folio, > loff_t pos, loff_t end_pos, unsigned int dirty_len); > int ioend_writeback_submit(struct iomap_writeback_ctx *wpc, int error); > + > +void iomap_start_folio_write(struct inode *inode, struct folio *folio, > + size_t len); > +void iomap_finish_folio_write(struct inode *inode, struct folio *folio, > + size_t len); > int iomap_writepages(struct iomap_writeback_ctx *wpc); > > /* > -- > 2.47.2 > >