From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5204EC433E0 for ; Fri, 15 May 2020 13:18:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2FB1820709 for ; Fri, 15 May 2020 13:18:07 +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="SUkYzMwA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726231AbgEONRk (ORCPT ); Fri, 15 May 2020 09:17:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726171AbgEONRE (ORCPT ); Fri, 15 May 2020 09:17:04 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D9EEC05BD09; Fri, 15 May 2020 06:17:03 -0700 (PDT) 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=oXxUrvy/kUnfNT9NBeZHk9XD5uu+tqt+pEPP09Y9sOA=; b=SUkYzMwA5rJxAsCXPVwqy4823o 3C9B0BM9S6BCKYHLLy6zMrvqOl96W9IFUnDyAGmv+UhYhJcTfeROa52d4B9aPcbQv4zHt3iMxZfUN yu8jgcq5haLu9dOPznS20XLfYu9/q90w8WsorHf3AuOKcF9KyGLlxZPQMs8iY7qlUUjWmhXkKu7Id gpraHWyRx+l9C+UiGw5P1PYkbJ0b/kSrA9fMd0whYAWWxUsgtp8gzRYVgN5S9sineXmhQ01VWCYDR lJ3Akd4JA90WGE3lohJWdJkMVDj8PKoQHsJCFb5GJOAoOrnZRPcEkZaEvfpn+3u+lBQ1lrmPnwrn2 +T/+5+Xg==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZaD0-0005pN-S5; Fri, 15 May 2020 13:17:02 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 33/36] mm: Make __do_page_cache_readahead take a readahead_control Date: Fri, 15 May 2020 06:16:53 -0700 Message-Id: <20200515131656.12890-34-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200515131656.12890-1-willy@infradead.org> References: <20200515131656.12890-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: "Matthew Wilcox (Oracle)" Also call __do_page_cache_readahead() directly from ondemand_readahead() instead of indirecting via ra_submit(). Signed-off-by: Matthew Wilcox (Oracle) --- mm/internal.h | 11 +++++------ mm/readahead.c | 26 ++++++++++++++------------ 2 files changed, 19 insertions(+), 18 deletions(-) diff --git a/mm/internal.h b/mm/internal.h index 5efb13d5c226..fd3eaff7acdc 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -51,18 +51,17 @@ void unmap_page_range(struct mmu_gather *tlb, void force_page_cache_readahead(struct address_space *, struct file *, pgoff_t index, unsigned long nr_to_read); -void __do_page_cache_readahead(struct address_space *, struct file *, - pgoff_t index, unsigned long nr_to_read, - unsigned long lookahead_size); +void __do_page_cache_readahead(struct readahead_control *, + unsigned long nr_to_read, unsigned long lookahead_size); /* * Submit IO for the read-ahead request in file_ra_state. */ static inline void ra_submit(struct file_ra_state *ra, - struct address_space *mapping, struct file *filp) + struct address_space *mapping, struct file *file) { - __do_page_cache_readahead(mapping, filp, - ra->start, ra->size, ra->async_size); + DEFINE_READAHEAD(rac, file, mapping, ra->start); + __do_page_cache_readahead(&rac, ra->size, ra->async_size); } /** diff --git a/mm/readahead.c b/mm/readahead.c index 62da2d4beed1..74c7e1eff540 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -246,12 +246,11 @@ EXPORT_SYMBOL_GPL(page_cache_readahead_unbounded); * behaviour which would occur if page allocations are causing VM writeback. * We really don't want to intermingle reads and writes like that. */ -void __do_page_cache_readahead(struct address_space *mapping, - struct file *file, pgoff_t index, unsigned long nr_to_read, - unsigned long lookahead_size) +void __do_page_cache_readahead(struct readahead_control *rac, + unsigned long nr_to_read, unsigned long lookahead_size) { - DEFINE_READAHEAD(rac, file, mapping, index); - struct inode *inode = mapping->host; + struct inode *inode = rac->mapping->host; + unsigned long index = readahead_index(rac); loff_t isize = i_size_read(inode); pgoff_t end_index; /* The last page we want to read */ @@ -265,7 +264,7 @@ void __do_page_cache_readahead(struct address_space *mapping, if (nr_to_read > end_index - index) nr_to_read = end_index - index + 1; - page_cache_readahead_unbounded(&rac, nr_to_read, lookahead_size); + page_cache_readahead_unbounded(rac, nr_to_read, lookahead_size); } /* @@ -273,10 +272,11 @@ void __do_page_cache_readahead(struct address_space *mapping, * memory at once. */ void force_page_cache_readahead(struct address_space *mapping, - struct file *filp, pgoff_t index, unsigned long nr_to_read) + struct file *file, pgoff_t index, unsigned long nr_to_read) { + DEFINE_READAHEAD(rac, file, mapping, index); struct backing_dev_info *bdi = inode_to_bdi(mapping->host); - struct file_ra_state *ra = &filp->f_ra; + struct file_ra_state *ra = &file->f_ra; unsigned long max_pages; if (unlikely(!mapping->a_ops->readpage && !mapping->a_ops->readpages && @@ -294,7 +294,7 @@ void force_page_cache_readahead(struct address_space *mapping, if (this_chunk > nr_to_read) this_chunk = nr_to_read; - __do_page_cache_readahead(mapping, filp, index, this_chunk, 0); + __do_page_cache_readahead(&rac, this_chunk, 0); index += this_chunk; nr_to_read -= this_chunk; @@ -432,10 +432,11 @@ static int try_context_readahead(struct address_space *mapping, * A minimal readahead algorithm for trivial sequential/random reads. */ static void ondemand_readahead(struct address_space *mapping, - struct file_ra_state *ra, struct file *filp, + struct file_ra_state *ra, struct file *file, bool hit_readahead_marker, pgoff_t index, unsigned long req_size) { + DEFINE_READAHEAD(rac, file, mapping, index); struct backing_dev_info *bdi = inode_to_bdi(mapping->host); unsigned long max_pages = ra->ra_pages; unsigned long add_pages; @@ -516,7 +517,7 @@ static void ondemand_readahead(struct address_space *mapping, * standalone, small random read * Read as is, and do not pollute the readahead state. */ - __do_page_cache_readahead(mapping, filp, index, req_size, 0); + __do_page_cache_readahead(&rac, req_size, 0); return; initial_readahead: @@ -542,7 +543,8 @@ static void ondemand_readahead(struct address_space *mapping, } } - ra_submit(ra, mapping, filp); + rac._index = ra->start; + __do_page_cache_readahead(&rac, ra->size, ra->async_size); } /** -- 2.26.2