From patchwork Wed Jan 15 02:38:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 11333181 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 706E292A for ; Wed, 15 Jan 2020 02:39:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3DA3C222C3 for ; Wed, 15 Jan 2020 02:39:16 +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="fNsMdZDD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3DA3C222C3 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 46F0F8E000D; Tue, 14 Jan 2020 21:39:15 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 3F8E28E0008; Tue, 14 Jan 2020 21:39:15 -0500 (EST) 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 2C0D68E000D; Tue, 14 Jan 2020 21:39:15 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0113.hostedemail.com [216.40.44.113]) by kanga.kvack.org (Postfix) with ESMTP id 0FCD98E0008 for ; Tue, 14 Jan 2020 21:39:15 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id D089240CD for ; Wed, 15 Jan 2020 02:39:14 +0000 (UTC) X-FDA: 76378311828.15.door43_8ae433eec3816 X-Spam-Summary: 2,0,0,cdac8e77ef573452,d41d8cd98f00b204,willy@infradead.org,:linux-xfs@vger.kernel.org:linux-fsdevel@vger.kernel.org::willy@infradead.org:jlayton@kernel.org:hch@infradead.org:clm@fb.com,RULES_HIT:41:69:355:379:541:800:960:973:988:989:1260:1311:1314:1345:1359:1437:1515:1535:1544:1711:1730:1747:1777:1792:2198:2199:2393:2559:2562:2693:2898:3138:3139:3140:3141:3142:3355:3865:3866:3867:3870:4321:5007:6261:6653:7576:7875:8957:10004:11026:11658:11914:12043:12291:12296:12297:12438:12555:12679:12683:12895:13894:14096:14110:14181:14394:14721:21063:21080:21451:21627:21990:30054:30070,0,RBL:198.137.202.133:@infradead.org:.lbl8.mailshell.net-62.8.0.100 64.201.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: door43_8ae433eec3816 X-Filterd-Recvd-Size: 5954 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf22.hostedemail.com (Postfix) with ESMTP for ; Wed, 15 Jan 2020 02:39:14 +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:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Jnl/1wWGv1qKEBLHgKybzlxexpnxYVaV1z0LZYLTylg=; b=fNsMdZDDDhAxaEf0S5ZbQhtNbp ck5GXITH0c/I/yAiRxCPJbzo63MhyMhJhzU1be8Im3AienbE6KGmJi+ZKsXSLRnrsnzhvpClwB3Zv MRBwZhZx9dyTKOkawc+gD7lpb4re71ROQLaFy48H+DtWwSEi3/dimRkMzHiXHLVkOoxp8zOT0yW7E euCKIlxjmoU9QLU7I/L/LntRGRhficSYXtBbWeaXj+scxxexJ+8rr8L1w1RiC3gbpKhH33ubXFhqo wkcO5m1MoHrjWJmW12sNVfu5GP12rfT89te61rBUNeeLlJoPq5y9ZyW4NSh+euQbBi80jqbrm0PJo GKj/mpUQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1irYZy-0008Al-3l; Wed, 15 Jan 2020 02:38:46 +0000 From: Matthew Wilcox To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , Jeff Layton , Christoph Hellwig , Chris Mason Subject: [PATCH v2 4/9] readahead: Put pages in cache earlier Date: Tue, 14 Jan 2020 18:38:38 -0800 Message-Id: <20200115023843.31325-5-willy@infradead.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200115023843.31325-1-willy@infradead.org> References: <20200115023843.31325-1-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)" At allocation time, put the pages in the cache unless we're using ->readpages. Signed-off-by: Matthew Wilcox (Oracle) --- mm/readahead.c | 51 +++++++++++++++++++++++++++++++------------------- 1 file changed, 32 insertions(+), 19 deletions(-) diff --git a/mm/readahead.c b/mm/readahead.c index fc77d13af556..5a6676640f20 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -114,10 +114,10 @@ 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) + struct list_head *pages, pgoff_t start, + unsigned int nr_pages) { struct blk_plug plug; - unsigned page_idx; blk_start_plug(&plug); @@ -125,18 +125,17 @@ static void read_pages(struct address_space *mapping, struct file *filp, mapping->a_ops->readpages(filp, mapping, pages, nr_pages); /* Clean up the remaining pages */ put_pages_list(pages); - goto out; - } + } else { + struct page *page; + unsigned long index; - for (page_idx = 0; page_idx < nr_pages; page_idx++) { - struct page *page = lru_to_page(pages); - list_del(&page->lru); - if (!add_to_page_cache_lru(page, mapping, page->index, gfp)) + xa_for_each_range(&mapping->i_pages, index, page, start, + start + nr_pages - 1) { mapping->a_ops->readpage(filp, page); - put_page(page); + put_page(page); + } } -out: blk_finish_plug(&plug); } @@ -157,9 +156,11 @@ unsigned long __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; + pgoff_t page_offset; unsigned long nr_pages = 0; loff_t isize = i_size_read(inode); gfp_t gfp_mask = readahead_gfp_mask(mapping); + bool use_list = mapping->a_ops->readpages; if (isize == 0) goto out; @@ -170,7 +171,7 @@ unsigned long __do_page_cache_readahead(struct address_space *mapping, * Preallocate as many pages as we will need. */ for (page_idx = 0; page_idx < nr_to_read; page_idx++) { - pgoff_t page_offset = offset + page_idx; + page_offset = offset + page_idx; if (page_offset > end_index) break; @@ -178,13 +179,14 @@ unsigned long __do_page_cache_readahead(struct address_space *mapping, page = xa_load(&mapping->i_pages, page_offset); if (page && !xa_is_value(page)) { /* - * Page already present? Kick off the current batch of - * contiguous pages before continuing with the next - * batch. + * Page already present? Kick off the current batch + * of contiguous pages before continuing with the + * next batch. */ if (nr_pages) - read_pages(mapping, filp, &page_pool, nr_pages, - gfp_mask); + read_pages(mapping, filp, &page_pool, + page_offset - nr_pages, + nr_pages); nr_pages = 0; continue; } @@ -192,8 +194,18 @@ unsigned long __do_page_cache_readahead(struct address_space *mapping, page = __page_cache_alloc(gfp_mask); if (!page) break; - page->index = page_offset; - list_add(&page->lru, &page_pool); + if (use_list) { + page->index = page_offset; + list_add(&page->lru, &page_pool); + } else if (!add_to_page_cache_lru(page, mapping, page_offset, + gfp_mask)) { + if (nr_pages) + read_pages(mapping, filp, &page_pool, + page_offset - nr_pages, + nr_pages); + nr_pages = 0; + continue; + } if (page_idx == nr_to_read - lookahead_size) SetPageReadahead(page); nr_pages++; @@ -205,7 +217,8 @@ unsigned long __do_page_cache_readahead(struct address_space *mapping, * will then handle the error. */ if (nr_pages) - read_pages(mapping, filp, &page_pool, nr_pages, gfp_mask); + read_pages(mapping, filp, &page_pool, page_offset - nr_pages, + nr_pages); BUG_ON(!list_empty(&page_pool)); out: return nr_pages;