From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934695AbcECSWG (ORCPT ); Tue, 3 May 2016 14:22:06 -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 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> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 -- 2.6.3