From patchwork Tue Mar 13 13:26:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 10278829 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 1AB466038F for ; Tue, 13 Mar 2018 13:36:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0A1E028437 for ; Tue, 13 Mar 2018 13:36:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F33662847B; Tue, 13 Mar 2018 13:36:24 +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 8892328437 for ; Tue, 13 Mar 2018 13:36:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932660AbeCMN1G (ORCPT ); Tue, 13 Mar 2018 09:27:06 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:35476 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932623AbeCMN1D (ORCPT ); Tue, 13 Mar 2018 09:27:03 -0400 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=QB9lBewDLPQPuLPUyrQu3li0QQyVZNTK4bLkM2yi5dw=; b=gq2aVBdDSLxREDjH3UNLiV+M4 aI939jb7R5SSi74kvhprtf0j6NJBoSpR8jzlC772Wxu2B99T9u5PojeXC10shZyCKdqp4Q6BG/sFV V9ISEVPFoc3lR0beJHUg6uV3zM0JLg//A9e8W3iOu5/yvYEJD8D7/OCGsKvKj5LAL+fhf3rLMr4qr 6G2MERvP3HZP/xhRva8kQAcx2WPCOK5n6/CplEY5oql2YHwe3PSq63rPZLtDum3ZkfIfHGqj4sQCS hF5g9pVHRHHOCEjeTMZpUKDT3HOZm8TihcYZcxgx/0soQRJDoEsH2V7L8VucaZFwK0t05JtJiRsbX pCcURLH7A==; Received: from willy by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1evjxF-0004jz-JD; Tue, 13 Mar 2018 13:27:01 +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 Subject: [PATCH v9 45/61] shmem: Convert find_swap_entry to XArray Date: Tue, 13 Mar 2018 06:26:23 -0700 Message-Id: <20180313132639.17387-46-willy@infradead.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180313132639.17387-1-willy@infradead.org> References: <20180313132639.17387-1-willy@infradead.org> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Matthew Wilcox This is a 1:1 conversion. Signed-off-by: Matthew Wilcox --- mm/shmem.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index 0af8a439dfad..49f42dc9e1dc 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1076,28 +1076,27 @@ static void shmem_evict_inode(struct inode *inode) clear_inode(inode); } -static unsigned long find_swap_entry(struct radix_tree_root *root, void *item) +static unsigned long find_swap_entry(struct xarray *xa, void *item) { - struct radix_tree_iter iter; - void **slot; - unsigned long found = -1; + XA_STATE(xas, xa, 0); unsigned int checked = 0; + void *entry; rcu_read_lock(); - radix_tree_for_each_slot(slot, root, &iter, 0) { - if (*slot == item) { - found = iter.index; + xas_for_each(&xas, entry, ULONG_MAX) { + if (xas_retry(&xas, entry)) + continue; + if (entry == item) break; - } checked++; - if ((checked % 4096) != 0) + if ((checked % XA_CHECK_SCHED) != 0) continue; - slot = radix_tree_iter_resume(slot, &iter); + xas_pause(&xas); cond_resched_rcu(); } - rcu_read_unlock(); - return found; + + return xas_invalid(&xas) ? -1 : xas.xa_index; } /*