From patchwork Wed Oct 2 18:49:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13820282 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 748832194AB; Wed, 2 Oct 2024 18:50:06 +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=1727895006; cv=none; b=Fn9Q3AhLX7mioYtjVpu78JGNkA5z6Zv4smsuXN9f57zWLFepT4ynM0gilAjeBrudJFU9YHOXMvt3JW7836114Lrey7mIjrTsDIDB31z4vTO5RIbjFu9uI8vQNUY2OvpgOh+Q+h9VykfEnJaRSTBwSBq0FVMS1VIGBhDDbUVfI7M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727895006; c=relaxed/simple; bh=4t2FhPU1ioCf1EafHL72wvSNrYptyiNtdL+ORaEoEmg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=oQMF7e5GYkx8oEX/ijTlx5irlyWc6vf7o185zrTM1QVCT4Xc4TiyYOcpA0Tx6MaQzelPp3gAMs3TaKoPzHNIAE95qpi88FED58zCzuiYzF1fHXqwBayl/qGxHpH5RaVnZLumc3OIFOIu/ZLJJJxvjZG2Ui4/j6SWShsBPSTQ/mI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=V4OObcVn; 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="V4OObcVn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C88DBC4CEC2; Wed, 2 Oct 2024 18:50:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727895006; bh=4t2FhPU1ioCf1EafHL72wvSNrYptyiNtdL+ORaEoEmg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=V4OObcVnB2u4+GoipJoXrQ2p1ZeNEneChyK4w9m3o/Me4PaL1gRSEkUaYQwoClmBB 8vjqALRU8/RkodIS4HT8hP69AznS9H8Q3xK749hHviPbHo7X2Wz0eLV3mQ/XF2Xkf+ RDK/dm9uaGykveRB9TSc1OV4eS4EbZTUd65QO9SMwYF/zu7xGoGCrA2WsRQunqvv/6 6/0cPzY3xoVzL/SVOMjZlqJfwWfD0ElqQz8J1ibtqpBqZSNg9U5A0FJgINkgicbPI7 ThgF1gqcsOifzM8v/chn0v0rJ2ZFIuLcnlc84JhRBKuejq3n7bUTFQ6wimznvVlq10 /cxW3tE81aodA== From: Jeff Layton Date: Wed, 02 Oct 2024 14:49:33 -0400 Subject: [PATCH v9 05/12] 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-v9-5-77e2baad57ac@kernel.org> References: <20241002-mgtime-v9-0-77e2baad57ac@kernel.org> In-Reply-To: <20241002-mgtime-v9-0-77e2baad57ac@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 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=6077; i=jlayton@kernel.org; h=from:subject:message-id; bh=4t2FhPU1ioCf1EafHL72wvSNrYptyiNtdL+ORaEoEmg=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBm/ZXMOz1RaltWVjfd1YGG3CyRGDkmvjFrNgyX2 acg/8g3uPqJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZv2VzAAKCRAADmhBGVaC FdGsD/9hhin5H+43N15Xq+nWKGrjdKX4oiSyK0hU4y9aA3MnXMxN7JC3vsG8ftV5CFA4BG+a2fB L+xf5SOgkom1v2cr+olmxrOZbCoffl6/Uws0ITKzhdC6jpge/oPWdZodaEINZH8zWEqi/sT69q9 bwn+YwmnLwTBWcgHh2obcUTXZrVetfV6Py67U9Ty1yAbYEr2WoNS+WSGvx2FA3SrMel3gdNPwDo dBhyxFNPDMaxPznCSL3OP3ed2ZdrS0ya09LyzS/rDs2zwdSlhQpUIeGlLw6KrvF73TJEl4gYdHI a5/SPBsK81jIYPHrp5DrbKdYYEQkcaiwv3dCiw+WUehaftXj77+jqCo75xxNNV/1OYvcjhrkAJt yapJyWhlZPTQ7jnX0+fl9FQ8TBbvE1KX/y6fcGzUhTAVad2getD292ucx3KA8OY2EoGJxkuY8bJ xoIH/0XVUEeAq4IJyChrNlVkSCDqbsJluKkQNKjuUt/DWGf6NEGDAS51GDOMHDq31H3xLnn/+Vi LirGIVYgA31zDTQHT4eFFwJ6/lN1OWZ5N89LKocHcYBFGx0oZ81dEFSwn+9f6AXzZRFmp+DT7t8 BptgyqUZ2+yXUXywYul7/qVQr6SoUsIwCgNzfkepNSPWm8mg40QWVTIfI7iHwhLIqV3wZmqHflb IllTaKUWYPTcS5A== 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 7d1ede60e549..f7a25c511d6b 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 dd480bf51a2a..6eb6c39d0037 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 000000000000..c9e5ec930054 --- /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