From nobody Fri Dec 19 09:43:56 2025 Received: from SHSQR01.spreadtrum.com (mx1.unisoc.com [222.66.158.135]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5D4174401 for ; Tue, 19 Dec 2023 02:22:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=unisoc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=unisoc.com Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTP id 3BJ2LOSe060334; Tue, 19 Dec 2023 10:21:24 +0800 (+08) (envelope-from Zhiguo.Niu@unisoc.com) Received: from SHDLP.spreadtrum.com (bjmbx02.spreadtrum.com [10.0.64.8]) by dlp.unisoc.com (SkyGuard) with ESMTPS id 4SvKz30Xv3z2P0R2m; Tue, 19 Dec 2023 10:15:11 +0800 (CST) Received: from bj08434pcu.spreadtrum.com (10.0.73.87) by BJMBX02.spreadtrum.com (10.0.64.8) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Tue, 19 Dec 2023 10:21:21 +0800 From: Zhiguo Niu To: , CC: , , , , Subject: [PATCH V4] f2fs: show more discard status by sysfs Date: Tue, 19 Dec 2023 10:21:04 +0800 Message-ID: <1702952464-22050-1-git-send-email-zhiguo.niu@unisoc.com> X-Mailer: git-send-email 1.9.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SHCAS03.spreadtrum.com (10.0.1.207) To BJMBX02.spreadtrum.com (10.0.64.8) X-MAIL: SHSQR01.spreadtrum.com 3BJ2LOSe060334 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The current pending_discard attr just only shows the discard_cmd_cnt information. More discard status can be shown so that we can check them through sysfs when needed. Signed-off-by: Zhiguo Niu --- changes of v2: Improve the patch according to Chao's suggestions. changes of v3: Add a blank line for easy reading. changes of v4: Split to three entries --- --- Documentation/ABI/testing/sysfs-fs-f2fs | 15 +++++++++++++++ fs/f2fs/sysfs.c | 33 +++++++++++++++++++++++++++++= ++++ 2 files changed, 48 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/te= sting/sysfs-fs-f2fs index 4f1d4e6..606a298 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -159,6 +159,21 @@ Date: November 2021 Contact: "Jaegeuk Kim" Description: Shows the number of pending discard commands in the queue. =20 +What: /sys/fs/f2fs//issued_discard +Date: December 2023 +Contact: "Zhiguo Niu" +Description: Shows the number of issued discard. + +What: /sys/fs/f2fs//queued_discard +Date: December 2023 +Contact: "Zhiguo Niu" +Description: Shows the number of queued discard. + +What: /sys/fs/f2fs//undiscard_blks +Date: December 2023 +Contact: "Zhiguo Niu" +Description: Shows the total number of undiscard blocks. + What: /sys/fs/f2fs//max_victim_search Date: January 2014 Contact: "Jaegeuk Kim" diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 7099ffa..666efdd 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -143,6 +143,33 @@ static ssize_t pending_discard_show(struct f2fs_attr *= a, &SM_I(sbi)->dcc_info->discard_cmd_cnt)); } =20 +static ssize_t issued_discard_show(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, char *buf) +{ + if (!SM_I(sbi)->dcc_info) + return -EINVAL; + return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read( + &SM_I(sbi)->dcc_info->issued_discard)); +} + +static ssize_t queued_discard_show(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, char *buf) +{ + if (!SM_I(sbi)->dcc_info) + return -EINVAL; + return sysfs_emit(buf, "%llu\n", (unsigned long long)atomic_read( + &SM_I(sbi)->dcc_info->queued_discard)); +} + +static ssize_t undiscard_blks_show(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, char *buf) +{ + if (!SM_I(sbi)->dcc_info) + return -EINVAL; + return sysfs_emit(buf, "%u\n", + SM_I(sbi)->dcc_info->undiscard_blks); +} + static ssize_t gc_mode_show(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf) { @@ -1025,6 +1052,9 @@ static ssize_t f2fs_sb_feature_show(struct f2fs_attr = *a, F2FS_GENERAL_RO_ATTR(mounted_time_sec); F2FS_GENERAL_RO_ATTR(main_blkaddr); F2FS_GENERAL_RO_ATTR(pending_discard); +F2FS_GENERAL_RO_ATTR(issued_discard); +F2FS_GENERAL_RO_ATTR(queued_discard); +F2FS_GENERAL_RO_ATTR(undiscard_blks); F2FS_GENERAL_RO_ATTR(gc_mode); #ifdef CONFIG_F2FS_STAT_FS F2FS_GENERAL_RO_ATTR(moved_blocks_background); @@ -1084,6 +1114,9 @@ static ssize_t f2fs_sb_feature_show(struct f2fs_attr = *a, ATTR_LIST(max_ordered_discard), ATTR_LIST(discard_io_aware), ATTR_LIST(pending_discard), + ATTR_LIST(issued_discard), + ATTR_LIST(queued_discard), + ATTR_LIST(undiscard_blks), ATTR_LIST(gc_mode), ATTR_LIST(ipu_policy), ATTR_LIST(min_ipu_util), --=20 1.9.1