From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F150C4338F for ; Fri, 13 Aug 2021 12:32:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E43C4610A4 for ; Fri, 13 Aug 2021 12:32:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240260AbhHMMdD (ORCPT ); Fri, 13 Aug 2021 08:33:03 -0400 Received: from mail-m17636.qiye.163.com ([59.111.176.36]:51568 "EHLO mail-m17636.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233573AbhHMMdA (ORCPT ); Fri, 13 Aug 2021 08:33:00 -0400 Received: from comdg01144022.vivo.xyz (unknown [218.104.188.165]) by mail-m17636.qiye.163.com (Hmail) with ESMTPA id 3B6F3C40179; Fri, 13 Aug 2021 20:32:26 +0800 (CST) From: Yangtao Li To: jaegeuk@kernel.org, chao@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Yangtao Li Subject: [PATCH v5 1/2] f2fs: introduce proc/fs/f2fs//fsck_stack node Date: Fri, 13 Aug 2021 20:32:20 +0800 Message-Id: <20210813123221.185591-1-frank.li@vivo.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgPGg8OCBgUHx5ZQUlOS1dZCBgUCR5ZQVlLVUtZV1 kWDxoPAgseWUFZKDYvK1lXWShZQUhPN1dZLVlBSVdZDwkaFQgSH1lBWUNLH0xWTkNDHR9JHUJMQx keVRMBExYaEhckFA4PWVdZFhoPEhUdFFlBWU9LSFVKSktISkNVS1kG X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6NRQ6CDo5Lz8DAxhDMRYwMSku D0sKCx1VSlVKTUlDQ05MQk9NQ0xJVTMWGhIXVR0JGhUQVRcSOw0SDRRVGBQWRVlXWRILWUFZSUpD VUpLT1VKQ0NVSk1OWVdZCAFZQU9CTkI3Bg++ X-HM-Tid: 0a7b3f7fd127d996kuws3b6f3c40179 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SBI_NEED_FSCK is an indicator that fsck.f2fs needs to be triggered, this flag is set in too many places. For some scenes that are not very reproducible, adding stack information will help locate the problem. Let's expose all fsck stack history in procfs. Signed-off-by: Yangtao Li --- v5: -fix implicit declaration of function 'stack_trace_save' fs/f2fs/f2fs.h | 34 +++++++++++++++++++++++++++++++++- fs/f2fs/sysfs.c | 26 ++++++++++++++++++++++++++ 2 files changed, 59 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 67faa43cc141..cbd06dea3c6a 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -24,6 +24,8 @@ #include #include #include +#include +#include #include #include @@ -119,6 +121,8 @@ typedef u32 nid_t; #define COMPRESS_EXT_NUM 16 +#define FSCK_STACK_DEPTH 64 + struct f2fs_mount_info { unsigned int opt; int write_io_size_bits; /* Write IO size bits */ @@ -1786,6 +1790,8 @@ struct f2fs_sb_info { unsigned int compress_watermark; /* cache page watermark */ atomic_t compress_page_hit; /* cache hit count */ #endif + depot_stack_handle_t *fsck_stack; + unsigned int fsck_count; }; struct f2fs_private_dio { @@ -1997,9 +2003,35 @@ static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type) return test_bit(type, &sbi->s_flag); } -static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type) +static void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type) { set_bit(type, &sbi->s_flag); + + if (unlikely(type == SBI_NEED_FSCK)) { + unsigned long entries[FSCK_STACK_DEPTH]; + depot_stack_handle_t stack, *new; + unsigned int nr_entries; + int i; + + nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 0); + nr_entries = filter_irq_stacks(entries, nr_entries); + stack = stack_depot_save(entries, nr_entries, GFP_KERNEL); + if (!stack) + return; + + /* Try to find an existing entry for this backtrace */ + for (i = 0; i < sbi->fsck_count; i++) + if (sbi->fsck_stack[i] == stack) + return; + + new = krealloc(sbi->fsck_stack, (sbi->fsck_count + 1) * + sizeof(*sbi->fsck_stack), GFP_KERNEL); + if (!new) + return; + + sbi->fsck_stack = new; + sbi->fsck_stack[sbi->fsck_count++] = stack; + } } static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type) diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 0954761341d7..c134bbb99c7b 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -1171,6 +1171,29 @@ static int __maybe_unused iostat_info_seq_show(struct seq_file *seq, return 0; } +static int __maybe_unused fsck_stack_seq_show(struct seq_file *seq, + void *offset) +{ + struct super_block *sb = seq->private; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + unsigned long *entries; + unsigned int nr_entries; + unsigned int i, j; + + for (i = 0; i < sbi->fsck_count; i++) { + nr_entries = stack_depot_fetch(sbi->fsck_stack[i], &entries); + if (!entries) + return 0; + + for (j = 0; j < nr_entries; j++) + seq_printf(seq, "%pS\n", (void *)entries[j]); + + seq_putc(seq, '\n'); + } + + return 0; +} + static int __maybe_unused victim_bits_seq_show(struct seq_file *seq, void *offset) { @@ -1261,6 +1284,8 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi) iostat_info_seq_show, sb); proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc, victim_bits_seq_show, sb); + proc_create_single_data("fsck_stack", S_IRUGO, sbi->s_proc, + fsck_stack_seq_show, sb); } return 0; put_feature_list_kobj: @@ -1282,6 +1307,7 @@ void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) remove_proc_entry("segment_info", sbi->s_proc); remove_proc_entry("segment_bits", sbi->s_proc); remove_proc_entry("victim_bits", sbi->s_proc); + remove_proc_entry("fsck_stack", sbi->s_proc); remove_proc_entry(sbi->sb->s_id, f2fs_proc_root); } -- 2.32.0