From patchwork Fri Mar 20 14:22:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 11449213 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B2BEF17E6 for ; Fri, 20 Mar 2020 14:23:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 77B372078A for ; Fri, 20 Mar 2020 14:23:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="TKl7Ek9Z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 77B372078A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5E3526B0072; Fri, 20 Mar 2020 10:22:39 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id E93766B007D; Fri, 20 Mar 2020 10:22:38 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 650DA6B0007; Fri, 20 Mar 2020 10:22:38 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0168.hostedemail.com [216.40.44.168]) by kanga.kvack.org (Postfix) with ESMTP id 75F6D6B006E for ; Fri, 20 Mar 2020 10:22:37 -0400 (EDT) Received: from smtpin20.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 35EF47593 for ; Fri, 20 Mar 2020 14:22:37 +0000 (UTC) X-FDA: 76615956354.20.pan33_16d8bff32f950 X-Spam-Summary: 2,0,0,c56fa6d0bd36eba0,d41d8cd98f00b204,willy@infradead.org,,RULES_HIT:41:69:355:379:541:800:960:973:988:989:1260:1311:1314:1345:1359:1437:1515:1535:1543:1711:1730:1747:1777:1792:2198:2199:2393:2559:2562:2693:2898:3138:3139:3140:3141:3142:3354:3865:3866:3867:3868:3870:3872:4321:5007:6261:6653:6742:7576:7875:7903:8957:10004:11026:11658:11914:12043:12296:12297:12438:12555:12683:12895:13894:14096:14181:14394:14721:21080:21451:21627:21990:30036:30054:30064:30070,0,RBL:198.137.202.133:@infradead.org:.lbl8.mailshell.net-64.201.201.201 62.8.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:1,LUA_SUMMARY:none X-HE-Tag: pan33_16d8bff32f950 X-Filterd-Recvd-Size: 5567 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf17.hostedemail.com (Postfix) with ESMTP for ; Fri, 20 Mar 2020 14:22:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; 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=nvBUEQIRW+oJfT4A2tun4ZxFtt+tUcLBZ6qVvFZPpNk=; b=TKl7Ek9Z+WxWpSP9JKXjm+y3A3 LuShn6oxASy88pBdumDq+EjKPZt+b8aC+BKJ3pyOGBRcgmasuwFx8my9YwZ0Y3BQJUSMKQL0HyHi6 aw2O4HW7RY9ua6k4AG7nmKJ0nWVF5V5fE0nPFMDR82GGd/s0KEV11FC/NmkRN29Cw2pm4rZwFrgYs EfD1gPlGKqgQtqBOsIjUxiBAcROgGoLiaUqTjpcezki/0MYvoPQMZWIlYMdOSA8VaSUweD3sBOFjn ZpOUX5Y4lkV9HBeMo/+jacCKDytNQJp6DfXugqC3YdsasEHI2BZoL7GksDlMkpK86cfLWSnOBn9au 2xzaRN3g==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jFIXh-0000hN-7u; Fri, 20 Mar 2020 14:22:33 +0000 From: Matthew Wilcox To: Andrew Morton Cc: "Matthew Wilcox (Oracle)" , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, ocfs2-devel@oss.oracle.com, linux-xfs@vger.kernel.org, John Hubbard , Christoph Hellwig , William Kucharski Subject: [PATCH v9 06/25] mm: Use readahead_control to pass arguments Date: Fri, 20 Mar 2020 07:22:12 -0700 Message-Id: <20200320142231.2402-7-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200320142231.2402-1-willy@infradead.org> References: <20200320142231.2402-1-willy@infradead.org> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: "Matthew Wilcox (Oracle)" In this patch, only between __do_page_cache_readahead() and read_pages(), but it will be extended in upcoming patches. The read_pages() function becomes aops centric, as this makes the most sense by the end of the patchset. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: John Hubbard Reviewed-by: Christoph Hellwig Reviewed-by: William Kucharski --- mm/readahead.c | 33 +++++++++++++++++++-------------- 1 file changed, 19 insertions(+), 14 deletions(-) diff --git a/mm/readahead.c b/mm/readahead.c index 9fcd4e32b62d..9d9aa4ffc7d4 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -113,29 +113,32 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages, EXPORT_SYMBOL(read_cache_pages); -static void read_pages(struct address_space *mapping, struct file *filp, - struct list_head *pages, unsigned int nr_pages, gfp_t gfp) +static void read_pages(struct readahead_control *rac, struct list_head *pages, + gfp_t gfp) { + const struct address_space_operations *aops = rac->mapping->a_ops; struct blk_plug plug; unsigned page_idx; - if (!nr_pages) + if (!readahead_count(rac)) return; blk_start_plug(&plug); - if (mapping->a_ops->readpages) { - mapping->a_ops->readpages(filp, mapping, pages, nr_pages); + if (aops->readpages) { + aops->readpages(rac->file, rac->mapping, pages, + readahead_count(rac)); /* Clean up the remaining pages */ put_pages_list(pages); goto out; } - for (page_idx = 0; page_idx < nr_pages; page_idx++) { + for (page_idx = 0; page_idx < readahead_count(rac); page_idx++) { struct page *page = lru_to_page(pages); list_del(&page->lru); - if (!add_to_page_cache_lru(page, mapping, page->index, gfp)) - mapping->a_ops->readpage(filp, page); + if (!add_to_page_cache_lru(page, rac->mapping, page->index, + gfp)) + aops->readpage(rac->file, page); put_page(page); } @@ -143,6 +146,7 @@ static void read_pages(struct address_space *mapping, struct file *filp, blk_finish_plug(&plug); BUG_ON(!list_empty(pages)); + rac->_nr_pages = 0; } /* @@ -160,9 +164,12 @@ void __do_page_cache_readahead(struct address_space *mapping, unsigned long end_index; /* The last page we want to read */ LIST_HEAD(page_pool); int page_idx; - unsigned int nr_pages = 0; loff_t isize = i_size_read(inode); gfp_t gfp_mask = readahead_gfp_mask(mapping); + struct readahead_control rac = { + .mapping = mapping, + .file = filp, + }; if (isize == 0) return; @@ -185,9 +192,7 @@ void __do_page_cache_readahead(struct address_space *mapping, * contiguous pages before continuing with the next * batch. */ - read_pages(mapping, filp, &page_pool, nr_pages, - gfp_mask); - nr_pages = 0; + read_pages(&rac, &page_pool, gfp_mask); continue; } @@ -198,7 +203,7 @@ void __do_page_cache_readahead(struct address_space *mapping, list_add(&page->lru, &page_pool); if (page_idx == nr_to_read - lookahead_size) SetPageReadahead(page); - nr_pages++; + rac._nr_pages++; } /* @@ -206,7 +211,7 @@ void __do_page_cache_readahead(struct address_space *mapping, * uptodate then the caller will launch readpage again, and * will then handle the error. */ - read_pages(mapping, filp, &page_pool, nr_pages, gfp_mask); + read_pages(&rac, &page_pool, gfp_mask); } /*