From patchwork Tue Mar 6 19:23:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 10262685 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 368CB602BD for ; Tue, 6 Mar 2018 19:38:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2632428EE8 for ; Tue, 6 Mar 2018 19:38:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1AC1F28F8B; Tue, 6 Mar 2018 19:38:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A27BA28EE8 for ; Tue, 6 Mar 2018 19:38:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754072AbeCFThj (ORCPT ); Tue, 6 Mar 2018 14:37:39 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:49006 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933178AbeCFTYb (ORCPT ); Tue, 6 Mar 2018 14:24:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=dDEsTewQQQIDWgJMtqHX0kZmwiRB8c7pGcIvmxu/0k4=; b=W8+524xRWbeC7TZD0WOZ6f3Qx LMJAGx1brpXQExDIlP+sL4q4K9eE422S10N7/0weEwioEoTwTRU+jb5BYbzDLlNReTkdE80Kt5zKa +fco/ubwwsLZ32YgyvFfYQPSeX3aSkI//+Y1T9F8dQGGpFnx/N0XNMIDKgwxne9A0mHQYNpdLaH6p QS7t2Oi+LlVT9P8g89vK5fm2OxdaUgJWcUn6F9mqaktXjVqXehP6vUobfCl8F9mUQgFCZGH/WDeOU E/GSuU/vRR2SP9OJarqx90yV3ILKpPd9Rqc2S4dnVdU3OC6p14WYk/6R6Jxd3AikCWCzQ8S7JTFhc iyG4zzLCA==; Received: from willy by bombadil.infradead.org with local (Exim 4.89 #1 (Red Hat Linux)) id 1etICL-0001Xs-NY; Tue, 06 Mar 2018 19:24:29 +0000 From: Matthew Wilcox To: Andrew Morton Cc: Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Ryusuke Konishi , linux-nilfs@vger.kernel.org, linux-btrfs@vger.kernel.org Subject: [PATCH v8 31/63] page cache: Convert delete_batch to XArray Date: Tue, 6 Mar 2018 11:23:41 -0800 Message-Id: <20180306192413.5499-32-willy@infradead.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180306192413.5499-1-willy@infradead.org> References: <20180306192413.5499-1-willy@infradead.org> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Matthew Wilcox Rename the function from page_cache_tree_delete_batch to just page_cache_delete_batch. Signed-off-by: Matthew Wilcox --- mm/filemap.c | 28 +++++++++++++--------------- 1 file changed, 13 insertions(+), 15 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index 5a6c7c874d45..0635e9cdbc06 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -275,7 +275,7 @@ void delete_from_page_cache(struct page *page) EXPORT_SYMBOL(delete_from_page_cache); /* - * page_cache_tree_delete_batch - delete several pages from page cache + * page_cache_delete_batch - delete several pages from page cache * @mapping: the mapping to which pages belong * @pvec: pagevec with pages to delete * @@ -288,23 +288,18 @@ EXPORT_SYMBOL(delete_from_page_cache); * * The function expects the i_pages lock to be held. */ -static void -page_cache_tree_delete_batch(struct address_space *mapping, +static void page_cache_delete_batch(struct address_space *mapping, struct pagevec *pvec) { - struct radix_tree_iter iter; - void **slot; + XA_STATE(xas, &mapping->i_pages, pvec->pages[0]->index); int total_pages = 0; int i = 0, tail_pages = 0; struct page *page; - pgoff_t start; - start = pvec->pages[0]->index; - radix_tree_for_each_slot(slot, &mapping->i_pages, &iter, start) { + mapping_set_update(&xas, mapping); + xas_for_each(&xas, page, ULONG_MAX) { if (i >= pagevec_count(pvec) && !tail_pages) break; - page = radix_tree_deref_slot_protected(slot, - &mapping->i_pages.xa_lock); if (xa_is_value(page)) continue; if (!tail_pages) { @@ -313,8 +308,11 @@ page_cache_tree_delete_batch(struct address_space *mapping, * have our pages locked so they are protected from * being removed. */ - if (page != pvec->pages[i]) + if (page != pvec->pages[i]) { + VM_BUG_ON_PAGE(page->index > + pvec->pages[i]->index, page); continue; + } WARN_ON_ONCE(!PageLocked(page)); if (PageTransHuge(page) && !PageHuge(page)) tail_pages = HPAGE_PMD_NR - 1; @@ -325,11 +323,11 @@ page_cache_tree_delete_batch(struct address_space *mapping, */ i++; } else { + VM_BUG_ON_PAGE(page->index + HPAGE_PMD_NR - tail_pages + != pvec->pages[i]->index, page); tail_pages--; } - radix_tree_clear_tags(&mapping->i_pages, iter.node, slot); - __radix_tree_replace(&mapping->i_pages, iter.node, slot, NULL, - workingset_lookup_update(mapping)); + xas_store(&xas, NULL); total_pages++; } mapping->nrpages -= total_pages; @@ -350,7 +348,7 @@ void delete_from_page_cache_batch(struct address_space *mapping, unaccount_page_cache_page(mapping, pvec->pages[i]); } - page_cache_tree_delete_batch(mapping, pvec); + page_cache_delete_batch(mapping, pvec); xa_unlock_irqrestore(&mapping->i_pages, flags); for (i = 0; i < pagevec_count(pvec); i++)