From patchwork Fri Dec 22 15:08:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13503403 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 3582E2E837; Fri, 22 Dec 2023 15:09:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="fsTEpZhG" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=nwSb0aQ6WVWAqtAF+HdyJ3HlPU1688MOnHDS98Pt7+A=; b=fsTEpZhGkE4khH8MXT4PtBYhdo ZQgp/dXeIGwyn7s3VuOqu6GmTRUxeSslau35ljaEbUfRgqA0ZEAH8JVNUJqryffLuZ1tiX++MxAHy Nq+T9gs+7AeBOpWiNijbKLhyOEzHiXCvYJyQBKAzyR6Jx96R9RLRtpKuVe/PAuijSu2MSVEHhsx60 po2QLtX1ruHagJovmBJr49HjCGb76ply2cGzBN7tNen/Y7LvzOWkGILqJzTcP2VcgfasfyxRa/YLB CMyztaZTGjFje4ZGqnH7q15JeaxPgTH5DZcug+qDAWvVZPH+wM4/3FoVMrbM3vDe1Jt7WqAsXg8ta 7O6j3/7A==; Received: from 2a02-8389-2341-5b80-39d3-4735-9a3c-88d8.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:39d3:4735:9a3c:88d8] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1rGh91-006BYP-2j; Fri, 22 Dec 2023 15:09:00 +0000 From: Christoph Hellwig To: linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , Jan Kara , David Howells , Brian Foster , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Jan Kara , Dave Chinner Subject: [PATCH 13/17] writeback: Move the folio_prepare_writeback loop out of write_cache_pages() Date: Fri, 22 Dec 2023 16:08:23 +0100 Message-Id: <20231222150827.1329938-14-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231222150827.1329938-1-hch@lst.de> References: <20231222150827.1329938-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html From: "Matthew Wilcox (Oracle)" Move the loop for should-we-write-this-folio to writeback_get_folio. Signed-off-by: Matthew Wilcox (Oracle) [hch: folded the loop into the existing helper instead of a separate one as suggested by Jan Kara] Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Acked-by: Dave Chinner --- mm/page-writeback.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index f85145f330bb36..b6048c14748fdb 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2434,6 +2434,7 @@ static struct folio *writeback_get_folio(struct address_space *mapping, { struct folio *folio; +retry: folio = folio_batch_next(&wbc->fbatch); if (!folio) { folio_batch_release(&wbc->fbatch); @@ -2441,8 +2442,17 @@ static struct folio *writeback_get_folio(struct address_space *mapping, filemap_get_folios_tag(mapping, &wbc->index, wbc_end(wbc), wbc_to_tag(wbc), &wbc->fbatch); folio = folio_batch_next(&wbc->fbatch); + if (!folio) + return NULL; } + folio_lock(folio); + if (unlikely(!folio_prepare_writeback(mapping, wbc, folio))) { + folio_unlock(folio); + goto retry; + } + + trace_wbc_writepage(wbc, inode_to_bdi(mapping->host)); return folio; } @@ -2505,14 +2515,6 @@ int write_cache_pages(struct address_space *mapping, folio = writeback_get_folio(mapping, wbc)) { unsigned long nr; - folio_lock(folio); - if (!folio_prepare_writeback(mapping, wbc, folio)) { - folio_unlock(folio); - continue; - } - - trace_wbc_writepage(wbc, inode_to_bdi(mapping->host)); - error = writepage(folio, wbc, data); nr = folio_nr_pages(folio); wbc->nr_to_write -= nr;