From patchwork Tue May 3 18:21:44 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaegeuk Kim X-Patchwork-Id: 9007691 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 1F69C9F1D3 for ; Tue, 3 May 2016 18:24:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 57FC8202D1 for ; Tue, 3 May 2016 18:24:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5C5BB20219 for ; Tue, 3 May 2016 18:24:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934633AbcECSWE (ORCPT ); Tue, 3 May 2016 14:22:04 -0400 Received: from mail.kernel.org ([198.145.29.136]:51353 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934457AbcECSWD (ORCPT ); Tue, 3 May 2016 14:22:03 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 157B22035D; Tue, 3 May 2016 18:22:02 +0000 (UTC) Received: from localhost (107-1-141-74-ip-static.hfc.comcastbusiness.net [107.1.141.74]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3E42220320; Tue, 3 May 2016 18:22:01 +0000 (UTC) From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim Subject: [PATCH 07/11] f2fs: inject page allocation failures Date: Tue, 3 May 2016 11:21:44 -0700 Message-Id: <1462299708-67906-7-git-send-email-jaegeuk@kernel.org> X-Mailer: git-send-email 2.6.3 In-Reply-To: <1462299708-67906-1-git-send-email-jaegeuk@kernel.org> References: <1462299708-67906-1-git-send-email-jaegeuk@kernel.org> X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 This patch adds page allocation failures. Signed-off-by: Jaegeuk Kim --- fs/f2fs/f2fs.h | 9 +++++++++ fs/f2fs/super.c | 1 + 2 files changed, 10 insertions(+) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 60098df..02c2c96 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -40,6 +40,7 @@ #ifdef CONFIG_F2FS_FAULT_INJECTION enum { FAULT_KMALLOC, + FAULT_PAGE_ALLOC, FAULT_MAX, }; @@ -1296,6 +1297,14 @@ static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) static inline struct page *f2fs_grab_cache_page(struct address_space *mapping, pgoff_t index, bool for_write) { +#ifdef CONFIG_F2FS_FAULT_INJECTION + struct page *page = find_lock_page(mapping, index); + if (page) + return page; + + if (time_to_inject(FAULT_PAGE_ALLOC)) + return NULL; +#endif if (!for_write) return grab_cache_page(mapping, index); return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 76f4d2c..1715794 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -45,6 +45,7 @@ atomic_t f2fs_ops; char *fault_name[FAULT_MAX] = { [FAULT_KMALLOC] = "kmalloc", + [FAULT_PAGE_ALLOC] = "page alloc", }; #endif