From patchwork Thu Jul 4 03:07:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongbo Li X-Patchwork-Id: 13723147 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) (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 41B461CA87; Thu, 4 Jul 2024 03:03:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.187 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720062212; cv=none; b=nVcQVV7NCEkJ89VHPtyabkCTnIPapaN6Po7hT1A8SOif4VaXR/SXlbYvmMuhu++AAtrXTHMUpmjtf/HuPfUZM8vOF28TKrqI0TQ/wCTnQ4NuUUvhdmuP+oc5cdp1tG0hi3euYrg+03x5wKdbXpPMeKkYs97RyRiHYOfeAmyjgSs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720062212; c=relaxed/simple; bh=dGLTdYq2h2klz3YB7ga+OgY2y9/yXF+azhAYesQVP+0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=nBYSg90E7r8J9HWWgLAi8gn64UsgwHF3q1Kmas9yT1AxvdRhWYwwl+wGqgYDWGyeT2U1pmVxrMLJ66IuHQ3q7YfraSCq+47xwu4MWtza22kOCHB1r2NZim8v2YcaylZXOjyjY1fEPzSiJQkJQNXnttZRu72M/Ipy9gpH+/XrWbI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.187 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.105]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4WF1ZC6VKXzxTN5; Thu, 4 Jul 2024 10:58:59 +0800 (CST) Received: from dggpeml500022.china.huawei.com (unknown [7.185.36.66]) by mail.maildlp.com (Postfix) with ESMTPS id 2BBD814011A; Thu, 4 Jul 2024 11:03:28 +0800 (CST) Received: from huawei.com (10.90.53.73) by dggpeml500022.china.huawei.com (7.185.36.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 4 Jul 2024 11:03:27 +0800 From: Hongbo Li To: , , , CC: , , , Subject: [PATCH v2 1/2] hugetlbfs: support tracepoint Date: Thu, 4 Jul 2024 11:07:03 +0800 Message-ID: <20240704030704.2289667-2-lihongbo22@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240704030704.2289667-1-lihongbo22@huawei.com> References: <20240704030704.2289667-1-lihongbo22@huawei.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpeml500022.china.huawei.com (7.185.36.66) Add basic tracepoints for {alloc, evict, free}_inode, setattr and fallocate. These can help users to debug hugetlbfs more conveniently. Signed-off-by: Hongbo Li --- MAINTAINERS | 1 + include/trace/events/hugetlbfs.h | 160 +++++++++++++++++++++++++++++++ 2 files changed, 161 insertions(+) create mode 100644 include/trace/events/hugetlbfs.h diff --git a/MAINTAINERS b/MAINTAINERS index cd2ca0c3158e..865c48e92d40 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10188,6 +10188,7 @@ F: Documentation/mm/hugetlbfs_reserv.rst F: Documentation/mm/vmemmap_dedup.rst F: fs/hugetlbfs/ F: include/linux/hugetlb.h +F: include/trace/events/hugetlbfs.h F: mm/hugetlb.c F: mm/hugetlb_vmemmap.c F: mm/hugetlb_vmemmap.h diff --git a/include/trace/events/hugetlbfs.h b/include/trace/events/hugetlbfs.h new file mode 100644 index 000000000000..975f584f6f51 --- /dev/null +++ b/include/trace/events/hugetlbfs.h @@ -0,0 +1,160 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM hugetlbfs + +#if !defined(_TRACE_HUGETLBFS_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_HUGETLBFS_H + +#include + +TRACE_EVENT(hugetlbfs_alloc_inode, + + TP_PROTO(struct inode *inode, struct inode *dir, int mode), + + TP_ARGS(inode, dir, mode), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(ino_t, dir) + __field(__u16, mode) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->dir = dir->i_ino; + __entry->mode = mode; + ), + + TP_printk("dev = (%d,%d), ino = %lu, dir = %lu, mode = 0%o", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long) __entry->ino, + (unsigned long) __entry->dir, __entry->mode) +); + +DECLARE_EVENT_CLASS(hugetlbfs__inode, + + TP_PROTO(struct inode *inode), + + TP_ARGS(inode), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(__u16, mode) + __field(loff_t, size) + __field(unsigned int, nlink) + __field(unsigned int, seals) + __field(blkcnt_t, blocks) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->mode = inode->i_mode; + __entry->size = inode->i_size; + __entry->nlink = inode->i_nlink; + __entry->seals = HUGETLBFS_I(inode)->seals; + __entry->blocks = inode->i_blocks; + ), + + TP_printk("dev = (%d,%d), ino = %lu, i_mode = 0%o, i_size = %lld, i_nlink = %u, seals = %u, i_blocks = %llu", + MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long) __entry->ino, + __entry->mode, __entry->size, __entry->nlink, __entry->seals, + (unsigned long long)__entry->blocks) +); + +DEFINE_EVENT(hugetlbfs__inode, hugetlbfs_evict_inode, + + TP_PROTO(struct inode *inode), + + TP_ARGS(inode) +); + +DEFINE_EVENT(hugetlbfs__inode, hugetlbfs_free_inode, + + TP_PROTO(struct inode *inode), + + TP_ARGS(inode) +); + +TRACE_EVENT(hugetlbfs_setattr, + + TP_PROTO(struct inode *inode, struct dentry *dentry, + struct iattr *attr), + + TP_ARGS(inode, dentry, attr), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(unsigned int, d_len) + __string(d_name, dentry->d_name.name) + __field(unsigned int, ia_valid) + __field(unsigned int, ia_mode) + __field(unsigned int, ia_uid) + __field(unsigned int, ia_gid) + __field(loff_t, old_size) + __field(loff_t, ia_size) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->d_len = dentry->d_name.len; + __assign_str(d_name); + __entry->ia_valid = attr->ia_valid; + __entry->ia_mode = attr->ia_mode; + __entry->ia_uid = from_kuid_munged(current_user_ns(), attr->ia_uid); + __entry->ia_gid = from_kgid_munged(current_user_ns(), attr->ia_gid); + __entry->old_size = inode->i_size; + __entry->ia_size = attr->ia_size; + ), + + TP_printk("dev = (%d,%d), ino = %lu, name = %.*s, ia_valid = %u, ia_mode = 0%o, ia_uid = %u, ia_gid = %u, old_size = %lld, ia_size = %lld", + MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long)__entry->ino, + __entry->d_len, __get_str(d_name), __entry->ia_valid, __entry->ia_mode, + __entry->ia_uid, __entry->ia_gid, __entry->old_size, __entry->ia_size) +); + +TRACE_EVENT(hugetlbfs_fallocate, + + TP_PROTO(struct inode *inode, int mode, + loff_t offset, loff_t len, int ret), + + TP_ARGS(inode, mode, offset, len, ret), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(int, mode) + __field(loff_t, offset) + __field(loff_t, len) + __field(loff_t, size) + __field(int, ret) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->mode = mode; + __entry->offset = offset; + __entry->len = len; + __entry->size = inode->i_size; + __entry->ret = ret; + ), + + TP_printk("dev = (%d,%d), ino = %lu, mode = %x, offset = %lld, len = %lld, i_size = %lld, ret = %d", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long)__entry->ino, __entry->mode, + (unsigned long long)__entry->offset, + (unsigned long long)__entry->len, + (unsigned long long)__entry->size, + __entry->ret) +); + +#endif /* _TRACE_HUGETLBFS_H */ + + /* This part must be outside protection */ +#include From patchwork Thu Jul 4 03:07:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongbo Li X-Patchwork-Id: 13723148 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (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 8909B19BA6; Thu, 4 Jul 2024 03:03:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.162.112]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4WF1b0689Vz1yv4x; Thu, 4 Jul 2024 10:59:40 +0800 (CST) Received: from dggpeml500022.china.huawei.com (unknown [7.185.36.66]) by mail.maildlp.com (Postfix) with ESMTPS id 503501402CD; Thu, 4 Jul 2024 11:03:29 +0800 (CST) Received: from huawei.com (10.90.53.73) by dggpeml500022.china.huawei.com (7.185.36.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 4 Jul 2024 11:03:29 +0800 From: Hongbo Li To: , , , CC: , , , Subject: [PATCH v2 2/2] hugetlbfs: use tracepoints in hugetlbfs functions. Date: Thu, 4 Jul 2024 11:07:04 +0800 Message-ID: <20240704030704.2289667-3-lihongbo22@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240704030704.2289667-1-lihongbo22@huawei.com> References: <20240704030704.2289667-1-lihongbo22@huawei.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpeml500022.china.huawei.com (7.185.36.66) Here we use the hugetlbfs tracepoint to track the call stack. And the output in trace is as follows: ``` touch-5250 [002] ..... 123.557640: hugetlbfs_alloc_inode: dev = (0,49), ino = 29897, dir = 24079, mode = 0100644 touch-5250 [002] ..... 123.557650: hugetlbfs_setattr: dev = (0,49), ino = 29897, name = test1, ia_valid = 131184, ia_mode = 036720, ia_uid = 2544251907, ia_gid = 65534, old_size = 0, ia_size = 4064 truncate-5251 [002] ..... 142.939424: hugetlbfs_setattr: dev = (0,49), ino = 29897, name = test1, ia_valid = 8296, ia_mode = 00, ia_uid = 0, ia_gid = 0, old_size = 0, ia_size = 2097152 rm-5273 [002] ..... 412.618383: hugetlbfs_evict_inode: dev = (0,49), ino = 29897, i_mode = 0100644, i_size = 2097152, i_nlink = 0, seals = 1, i_blocks = 0 -0 [002] ..s1. 412.634518: hugetlbfs_free_inode: dev = (0,49), ino = 29897, i_mode = 0100644, i_size = 2097152, i_nlink = 0, seals = 1, i_blocks = 0 ``` Signed-off-by: Hongbo Li --- fs/hugetlbfs/inode.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 412f295acebe..2e826bbcb6ed 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -39,6 +39,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include + static const struct address_space_operations hugetlbfs_aops; static const struct file_operations hugetlbfs_file_operations; static const struct inode_operations hugetlbfs_dir_inode_operations; @@ -686,6 +689,7 @@ static void hugetlbfs_evict_inode(struct inode *inode) { struct resv_map *resv_map; + trace_hugetlbfs_evict_inode(inode); remove_inode_hugepages(inode, 0, LLONG_MAX); /* @@ -813,8 +817,10 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset, if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; - if (mode & FALLOC_FL_PUNCH_HOLE) - return hugetlbfs_punch_hole(inode, offset, len); + if (mode & FALLOC_FL_PUNCH_HOLE) { + error = hugetlbfs_punch_hole(inode, offset, len); + goto out_nolock; + } /* * Default preallocate case. @@ -918,6 +924,9 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset, inode_set_ctime_current(inode); out: inode_unlock(inode); + +out_nolock: + trace_hugetlbfs_fallocate(inode, mode, offset, len, error); return error; } @@ -934,6 +943,8 @@ static int hugetlbfs_setattr(struct mnt_idmap *idmap, if (error) return error; + trace_hugetlbfs_setattr(inode, dentry, attr); + if (ia_valid & ATTR_SIZE) { loff_t oldsize = inode->i_size; loff_t newsize = attr->ia_size; @@ -1032,6 +1043,7 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, break; } lockdep_annotate_inode_mutex_key(inode); + trace_hugetlbfs_alloc_inode(inode, dir, mode); } else { if (resv_map) kref_put(&resv_map->refs, resv_map_release); @@ -1274,6 +1286,7 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb) static void hugetlbfs_free_inode(struct inode *inode) { + trace_hugetlbfs_free_inode(inode); kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode)); }