From patchwork Wed Oct 2 21:27:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13820424 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4741C21D2AC; Wed, 2 Oct 2024 21:27:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727904468; cv=none; b=ecavxAeNWjJxBh9fJUlTkRmp1+oM0JBEoSjKzsfpLF+NGNfrtbit1Td4f00/TGYaaYibAJr4Xq8XAyAuercYbAThunR+pg1A0DruKyyQdoFJI4wbHgHU+9ZXQUvb8dxMjrtAYDgYatOQWaGXyz3iWDetd6G4Md1bXlTZKVDGdnU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727904468; c=relaxed/simple; bh=MRGGG8rqdJzdD5KgI4WfyNMzLguXPYXob8v5j7W1QaM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Z9v0hJxXHa+29X7cd8WUVSJH8v67mfZZLCJSS2ml/MURxve7zRr7wLldU/KVskbMuTQJsK/XJ21RDhGrWA6JIwzpNHPk8TdzDacnrO4YQ4ZEa3JcB5SFNCCLMgtdmcXJtXiFjY1zehMHduN7yHi3xb3x62i6N0omCS5wl0JHW38= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RiQb+Vas; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RiQb+Vas" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 53227C4CED6; Wed, 2 Oct 2024 21:27:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727904467; bh=MRGGG8rqdJzdD5KgI4WfyNMzLguXPYXob8v5j7W1QaM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=RiQb+VasJhrhbm+efzGbpIcwLxszW5XKADxsVvHvZ4PtU9omVM1uKPRYjdDFTLrxU spC6qoc3Jx5R2FiTqiPPDvCGVFpDpJoGjjicm25vd2LLcfcz9jjV/RR/bjlnI1V4EY ad67YYwlvOrSCQNhgnodXxdPfs01FPltkNs3R5FmGOCg4ttPkExz83Q71CZ2EKDmER 3vEcrINS5svEVCEpFlZZQrG/rtN2NbUWpkxh9VaYk5MStmuCmVXUCBhdZXbYBg8jBs 7qYe48hdyaiE4eaWZsSg0Wr6BU5TlKcgxiilkkzod6H78fW5qEKHCFkhLxB0g4czZQ 211YHMvElLRgA== From: Jeff Layton Date: Wed, 02 Oct 2024 17:27:21 -0400 Subject: [PATCH v10 06/12] fs: tracepoints around multigrain timestamp events Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241002-mgtime-v10-6-d1c4717f5284@kernel.org> References: <20241002-mgtime-v10-0-d1c4717f5284@kernel.org> In-Reply-To: <20241002-mgtime-v10-0-d1c4717f5284@kernel.org> To: John Stultz , Thomas Gleixner , Stephen Boyd , Alexander Viro , Christian Brauner , Jan Kara , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Randy Dunlap , Chandan Babu R , "Darrick J. Wong" , Theodore Ts'o , Andreas Dilger , Chris Mason , Josef Bacik , David Sterba , Hugh Dickins , Andrew Morton , Chuck Lever , Vadim Fedorenko Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-mm@kvack.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=6245; i=jlayton@kernel.org; h=from:subject:message-id; bh=MRGGG8rqdJzdD5KgI4WfyNMzLguXPYXob8v5j7W1QaM=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBm/bq/rrV42gSWRnMywus+4vWn2erTXDHpugNyH p5Jt5mx0kCJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZv26vwAKCRAADmhBGVaC FfHLD/0Y+Ozd45QWOEXlGcizIJuYoklt/IclS6YYuOynkLK657rXW0pb+HYJPpKskii5RnL8UEO zVviDGgIKrEHkavVfZbP1PYA1Z+VQJxoYVWmMckxEU4D/ttgg9q8HMGi6CTbx8HZxejV2aRidO5 Q2DxmAfAokB2UKHZIppBcbZszz1P7Kl0yfRlUKeJuklq9GVYBs1Pim1fZgiXRyYL6b+tP/7ps5C ymjA4tKdOekiGiOceknMPhjV8Y9IqU+PmHDLm2KiN5LIetf6bnNXJkL52Q29NJ+eyMJwio0Ff1f Or/F8FVlAfl8FiM6wEM6D4BzMWoUdKQ4jZhMYgFdEkKNPohN1ckS5sGybaKegOQKCmz935a0+QB BPqzCoiaaZpYYAktHl5D4RtVolKmJtLGY2UYlkv0XkOyEjWDXeFzLnjTufDI846IzHPWWVDRGJ8 9EaICfw8ssZEJ1BjJ3qNb5yFKxCidh7aW86QQORcgAC80gN2aI+HZXv9ijN3+4SCsr/suRndazc kUa9Wh92buOEq+U0+WoJQBKJ5dKFUJram9X+6fl//fjCaCVByxDXkahkzeJk+k/CKqLT5eUqaWc XKmwVPbj0nWdMCahwZT6k0Suf4uVnDOSP/+bA9QNEaZGS34TkJrUBsyzRUcRoKoQpfFn6QVLS4H 6h9x5TdrOvNT+vg== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Add some tracepoints around various multigrain timestamp events. Reviewed-by: Josef Bacik Reviewed-by: Darrick J. Wong Reviewed-by: Jan Kara Reviewed-by: Steven Rostedt (Google) Tested-by: Randy Dunlap # documentation bits Signed-off-by: Jeff Layton --- fs/inode.c | 9 ++- fs/stat.c | 3 + include/trace/events/timestamp.h | 124 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 135 insertions(+), 1 deletion(-) diff --git a/fs/inode.c b/fs/inode.c index 7d1ede60e549683502911f3bb3a3a079768e449b..f7a25c511d6b7069fa235135cf3bad0cda32815b 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -22,6 +22,9 @@ #include #include #include +#define CREATE_TRACE_POINTS +#include + #include "internal.h" /* @@ -2603,6 +2606,7 @@ EXPORT_SYMBOL(inode_nohighmem); struct timespec64 inode_set_ctime_to_ts(struct inode *inode, struct timespec64 ts) { + trace_inode_set_ctime_to_ts(inode, &ts); set_normalized_timespec64(&ts, ts.tv_sec, ts.tv_nsec); inode->i_ctime_sec = ts.tv_sec; inode->i_ctime_nsec = ts.tv_nsec; @@ -2689,14 +2693,17 @@ struct timespec64 inode_set_ctime_current(struct inode *inode) } /* No need to cmpxchg if it's exactly the same */ - if (cns == now.tv_nsec && inode->i_ctime_sec == now.tv_sec) + if (cns == now.tv_nsec && inode->i_ctime_sec == now.tv_sec) { + trace_ctime_xchg_skip(inode, &now); goto out; + } cur = cns; retry: /* Try to swap the nsec value into place. */ if (try_cmpxchg(&inode->i_ctime_nsec, &cur, now.tv_nsec)) { /* If swap occurred, then we're (mostly) done */ inode->i_ctime_sec = now.tv_sec; + trace_ctime_ns_xchg(inode, cns, now.tv_nsec, cur); } else { /* * Was the change due to someone marking the old ctime QUERIED? diff --git a/fs/stat.c b/fs/stat.c index dd480bf51a2a764e5eb1d0a213c5ec8b640db911..6eb6c39d003755f9e602996ed93dcbd863847820 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -23,6 +23,8 @@ #include #include +#include + #include "internal.h" #include "mount.h" @@ -56,6 +58,7 @@ void fill_mg_cmtime(struct kstat *stat, u32 request_mask, struct inode *inode) if (!(stat->ctime.tv_nsec & I_CTIME_QUERIED)) stat->ctime.tv_nsec = ((u32)atomic_fetch_or(I_CTIME_QUERIED, pcn)); stat->ctime.tv_nsec &= ~I_CTIME_QUERIED; + trace_fill_mg_cmtime(inode, &stat->ctime, &stat->mtime); } EXPORT_SYMBOL(fill_mg_cmtime); diff --git a/include/trace/events/timestamp.h b/include/trace/events/timestamp.h new file mode 100644 index 0000000000000000000000000000000000000000..c9e5ec930054887a6a7bae8e487611b5ded33d71 --- /dev/null +++ b/include/trace/events/timestamp.h @@ -0,0 +1,124 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM timestamp + +#if !defined(_TRACE_TIMESTAMP_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_TIMESTAMP_H + +#include +#include + +#define CTIME_QUERIED_FLAGS \ + { I_CTIME_QUERIED, "Q" } + +DECLARE_EVENT_CLASS(ctime, + TP_PROTO(struct inode *inode, + struct timespec64 *ctime), + + TP_ARGS(inode, ctime), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(time64_t, ctime_s) + __field(u32, ctime_ns) + __field(u32, gen) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->gen = inode->i_generation; + __entry->ctime_s = ctime->tv_sec; + __entry->ctime_ns = ctime->tv_nsec; + ), + + TP_printk("ino=%d:%d:%ld:%u ctime=%lld.%u", + MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino, __entry->gen, + __entry->ctime_s, __entry->ctime_ns + ) +); + +DEFINE_EVENT(ctime, inode_set_ctime_to_ts, + TP_PROTO(struct inode *inode, + struct timespec64 *ctime), + TP_ARGS(inode, ctime)); + +DEFINE_EVENT(ctime, ctime_xchg_skip, + TP_PROTO(struct inode *inode, + struct timespec64 *ctime), + TP_ARGS(inode, ctime)); + +TRACE_EVENT(ctime_ns_xchg, + TP_PROTO(struct inode *inode, + u32 old, + u32 new, + u32 cur), + + TP_ARGS(inode, old, new, cur), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(u32, gen) + __field(u32, old) + __field(u32, new) + __field(u32, cur) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->gen = inode->i_generation; + __entry->old = old; + __entry->new = new; + __entry->cur = cur; + ), + + TP_printk("ino=%d:%d:%ld:%u old=%u:%s new=%u cur=%u:%s", + MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino, __entry->gen, + __entry->old & ~I_CTIME_QUERIED, + __print_flags(__entry->old & I_CTIME_QUERIED, "|", CTIME_QUERIED_FLAGS), + __entry->new, + __entry->cur & ~I_CTIME_QUERIED, + __print_flags(__entry->cur & I_CTIME_QUERIED, "|", CTIME_QUERIED_FLAGS) + ) +); + +TRACE_EVENT(fill_mg_cmtime, + TP_PROTO(struct inode *inode, + struct timespec64 *ctime, + struct timespec64 *mtime), + + TP_ARGS(inode, ctime, mtime), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(time64_t, ctime_s) + __field(time64_t, mtime_s) + __field(u32, ctime_ns) + __field(u32, mtime_ns) + __field(u32, gen) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->gen = inode->i_generation; + __entry->ctime_s = ctime->tv_sec; + __entry->mtime_s = mtime->tv_sec; + __entry->ctime_ns = ctime->tv_nsec; + __entry->mtime_ns = mtime->tv_nsec; + ), + + TP_printk("ino=%d:%d:%ld:%u ctime=%lld.%u mtime=%lld.%u", + MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino, __entry->gen, + __entry->ctime_s, __entry->ctime_ns, + __entry->mtime_s, __entry->mtime_ns + ) +); +#endif /* _TRACE_TIMESTAMP_H */ + +/* This part must be outside protection */ +#include