From nobody Mon Feb 9 16:51:12 2026 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (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 46A7A38B7D4; Tue, 3 Feb 2026 06:30:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770100227; cv=none; b=UGzpqxdPYG9/eh1Z4bJ3PeW2KOjpHtoNQW7I9obMLLVDhBz4yhhrpg5h/HF9X4Ck1o2/KkNmkKceo0NmfecL7WvSh7xIBd2Q15wfohxJjmsEYkiWRTH+1TFdYusPuTQrdKVBaDYHthxt6yabq3GGLmFCtn1bdPgPgZaxdqSpNyQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770100227; c=relaxed/simple; bh=RlJROsKsuZ2IUY0rvdbWaYINjizodYjUAPp4dLBZuY4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=p9LJlIxhDN0HOIEJIkRaLHuroUrnjDWdj45wTKsqEsxMvdefiLQ4NktFNsWod8XX15JuxBjFMy6Mtpya8I7qCCYMCHLgrTkgTb0YnM03lh12hjmeT8qKr7K8ocVX2kXy3FcjKExthx30ZhYaqCDtvxE25MI/Fxc96swN3PJtazk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.170]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTPS id 4f4tqr2LFMzYQv00; Tue, 3 Feb 2026 14:29:28 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 4319E4056B; Tue, 3 Feb 2026 14:30:15 +0800 (CST) Received: from huaweicloud.com (unknown [10.50.85.155]) by APP4 (Coremail) with SMTP id gCh0CgAHaPjnlYFpiadbGA--.27803S23; Tue, 03 Feb 2026 14:30:15 +0800 (CST) From: Zhang Yi To: linux-ext4@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.cz, ojaswin@linux.ibm.com, ritesh.list@gmail.com, hch@infradead.org, djwong@kernel.org, yi.zhang@huawei.com, yi.zhang@huaweicloud.com, yizhang089@gmail.com, libaokun1@huawei.com, yangerkun@huawei.com, yukuai@fnnas.com Subject: [PATCH -next v2 19/22] ext4: add block mapping tracepoints for iomap buffered I/O path Date: Tue, 3 Feb 2026 14:25:19 +0800 Message-ID: <20260203062523.3869120-20-yi.zhang@huawei.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260203062523.3869120-1-yi.zhang@huawei.com> References: <20260203062523.3869120-1-yi.zhang@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: gCh0CgAHaPjnlYFpiadbGA--.27803S23 X-Coremail-Antispam: 1UD129KBjvJXoWxXw4DXw48ur43Zr47KFWDCFg_yoWrJFyxpF yDtFy5GF4rZrsF9w4fWrW3Zr1Fva1xKr4UGry3Wry5JFWxtr42gF4UGFyYyFy5tw4jkryf XF4Yyry8G3W7urDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUHqb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E 14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7 xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Y z7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lF7Iv64x0x7Aq67IIx4CEVc8vx2IErcIFxwACI4 02YVCY1x02628vn2kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCF 04k20xvEw4C26cxK6c8Ij28IcwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14 v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_WrylIxkG c2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVW8JVW5JwCI42IY6xIIjxv20xvEc7CjxVAFwI 0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_ Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x07UZyC LUUUUU= Sender: yi.zhang@huaweicloud.com X-CM-SenderInfo: d1lo6xhdqjqx5xdzvxpfor3voofrz/ Content-Type: text/plain; charset="utf-8" Add tracepoints for iomap buffered read, write, partial block zeroing and writeback operations. Signed-off-by: Zhang Yi --- fs/ext4/inode.c | 6 +++++ include/trace/events/ext4.h | 45 +++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c59f3adba0f3..77dcca584153 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3956,6 +3956,8 @@ static int ext4_iomap_buffered_read_begin(struct inod= e *inode, loff_t offset, if (ret < 0) return ret; =20 + trace_ext4_iomap_buffered_read_begin(inode, &map, offset, length, + flags); ext4_set_iomap(inode, iomap, &map, offset, length, flags); return 0; } @@ -4040,6 +4042,8 @@ static int ext4_iomap_buffered_do_write_begin(struct = inode *inode, if (ret < 0) return ret; =20 + trace_ext4_iomap_buffered_write_begin(inode, &map, offset, length, + flags); ext4_set_iomap(inode, iomap, &map, offset, length, flags); return 0; } @@ -4142,6 +4146,7 @@ static int ext4_iomap_zero_begin(struct inode *inode, map.m_len =3D (offset >> blkbits) - map.m_lblk; } =20 + trace_ext4_iomap_zero_begin(inode, &map, offset, length, flags); ext4_set_iomap(inode, iomap, &map, offset, length, flags); iomap->flags |=3D iomap_flags; =20 @@ -4319,6 +4324,7 @@ static int ext4_iomap_map_writeback_range(struct ioma= p_writepage_ctx *wpc, } out: ewpc->data_seq =3D map.m_seq; + trace_ext4_iomap_map_writeback_range(inode, &map, offset, dirty_len, 0); ext4_set_iomap(inode, &wpc->iomap, &map, offset, dirty_len, 0); return 0; } diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index a3e8fe414df8..1922df4190e7 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -3096,6 +3096,51 @@ TRACE_EVENT(ext4_move_extent_exit, __entry->ret) ); =20 +DECLARE_EVENT_CLASS(ext4_set_iomap_class, + TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, + loff_t offset, loff_t length, unsigned int flags), + TP_ARGS(inode, map, offset, length, flags), + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(ext4_lblk_t, m_lblk) + __field(unsigned int, m_len) + __field(unsigned int, m_flags) + __field(u64, m_seq) + __field(loff_t, offset) + __field(loff_t, length) + __field(unsigned int, iomap_flags) + ), + TP_fast_assign( + __entry->dev =3D inode->i_sb->s_dev; + __entry->ino =3D inode->i_ino; + __entry->m_lblk =3D map->m_lblk; + __entry->m_len =3D map->m_len; + __entry->m_flags =3D map->m_flags; + __entry->m_seq =3D map->m_seq; + __entry->offset =3D offset; + __entry->length =3D length; + __entry->iomap_flags =3D flags; + + ), + TP_printk("dev %d:%d ino %lu m_lblk %u m_len %u m_flags %s m_seq %llu ori= g_off 0x%llx orig_len 0x%llx iomap_flags 0x%x", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->ino, __entry->m_lblk, __entry->m_len, + show_mflags(__entry->m_flags), __entry->m_seq, + __entry->offset, __entry->length, __entry->iomap_flags) +) + +#define DEFINE_SET_IOMAP_EVENT(name) \ +DEFINE_EVENT(ext4_set_iomap_class, name, \ + TP_PROTO(struct inode *inode, struct ext4_map_blocks *map, \ + loff_t offset, loff_t length, unsigned int flags), \ + TP_ARGS(inode, map, offset, length, flags)) + +DEFINE_SET_IOMAP_EVENT(ext4_iomap_buffered_read_begin); +DEFINE_SET_IOMAP_EVENT(ext4_iomap_buffered_write_begin); +DEFINE_SET_IOMAP_EVENT(ext4_iomap_map_writeback_range); +DEFINE_SET_IOMAP_EVENT(ext4_iomap_zero_begin); + #endif /* _TRACE_EXT4_H */ =20 /* This part must be outside protection */ --=20 2.52.0