From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23B6FFA3757 for ; Fri, 13 Sep 2024 14:02:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A30358D0009; Fri, 13 Sep 2024 10:02:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9B8268D0003; Fri, 13 Sep 2024 10:02:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7BD9F8D0009; Fri, 13 Sep 2024 10:02:40 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 5222C8D0003 for ; Fri, 13 Sep 2024 10:02:40 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id EC584C0571 for ; Fri, 13 Sep 2024 14:02:39 +0000 (UTC) X-FDA: 82559880438.08.D2EC478 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf12.hostedemail.com (Postfix) with ESMTP id 1FF2A4001E for ; Fri, 13 Sep 2024 14:02:37 +0000 (UTC) Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=OYkIZXRT; spf=pass (imf12.hostedemail.com: domain of jlayton@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=jlayton@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1726236129; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=zrxX/7Z92kScFuNOjOZDV1pFklXsydnQxPJetac8z2I=; b=qlb+PZyq64Ng5u1HDACtyWwZHJUIk2FDjqcd0jOzgS4RzoblMPjWw8+Kgkdw+M3sFks4sF hs9FJRizTIHsBW1io46/KvDufcqEgoKs+pvPOdKBOS03HsH4Pt3s0KHaO7XQ9jHndd5WR4 3XzGWwvNIjuOMIQjCfffQ/NOtivuxWQ= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=OYkIZXRT; spf=pass (imf12.hostedemail.com: domain of jlayton@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=jlayton@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1726236129; a=rsa-sha256; cv=none; b=T88+NdLhM00YblvXFCrtu3qKqcjnTtHqpthqkmannSqjCTxYb9QS532LoE4/aXG+b+vBbR +yp846j/hFZr5QHfzGh642W7my4XdtudddvKRlMZb5P0J4+j5anUHOuDOd5hGnp9Fmwfj3 2KcL4V950rjY/29YNyZ628ZbyiHom70= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 806655C061F; Fri, 13 Sep 2024 14:02:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 167E9C4CEC0; Fri, 13 Sep 2024 14:02:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726236156; bh=t2Ui/SX4AxPA+ilhCL7nQu41U9EfcHzmNFaUUk1q8Is=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=OYkIZXRTi49O5Zq64sitpXZgQwX0h94kLimMQ8lorTxH+cTU0HEeN5ghRmpBLz8hM ukRc7I+HdO+g0dPxSxCnkqO1kHJoPgQ66Brl4Djx8cZuj0bC1PmFW+pl//7g6iDAB+ KxnIlS+wEfr745xM44VQRFH2YsExJezUgMiMwuqYALSNjuOoqfjKuX1+7V/kcT6JU0 AjGJ91nkgLsnmzOcNJVYpQg59SkOHukaylhRRhDdDpTJY/0U4bIkPvSs8uF5jQDSEy 4LPMCJ8oI0wal4EUN2fpwMlwL4TdJJIGPE7DlHKqtejXGy1WSeqrD21LX1WxJLLZUA D/irB37RwbSQg== Message-ID: Subject: Re: [PATCH v7 05/11] fs: tracepoints around multigrain timestamp events From: Jeff Layton To: John Stultz , Thomas Gleixner , Stephen Boyd , Alexander Viro , Christian Brauner , Jan Kara , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , 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 Date: Fri, 13 Sep 2024 10:02:32 -0400 In-Reply-To: <20240913-mgtime-v7-5-92d4020e3b00@kernel.org> References: <20240913-mgtime-v7-0-92d4020e3b00@kernel.org> <20240913-mgtime-v7-5-92d4020e3b00@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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 EswWQ6Vh A5mr33nhj1l2rsHSf2aGQPgkZ3QYaLffOlJYQLOGZ8kEpBKIgavI22oWgL1eSn9iKKQS0+Nta+9Pbodguds6wFRxbgL4VDO4rGlqVrx66cTbD+2h5lo0hiAPLfnvLnlx6J0G9kLniGWWSXM3tXx/e2Ef6iDWrtYGF5C8rWTwmA8r84hiujU3o7tOShjv2+rOdNgjpCtWufom5VBgTsMfBRGK1Ev4owPZZIO3MA9IeJt9Z1vGsafJJVw60qF9ViiF4tTWNMcYDWxwZ/asS49pTDjn2w2dEotFVCbqrsMlr4osQsvhczJtvcSJ1tbfG/z9cg6j/ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, 2024-09-13 at 09:54 -0400, Jeff Layton wrote: > Add some tracepoints around various multigrain timestamp events. >=20 > Reviewed-by: Josef Bacik > Reviewed-by: Darrick J. Wong > Reviewed-by: Jan Kara > Signed-off-by: Jeff Layton > --- > fs/inode.c | 6 ++ > fs/stat.c | 3 + > include/trace/events/timestamp.h | 124 +++++++++++++++++++++++++++++++++= ++++++ > 3 files changed, 133 insertions(+) >=20 > diff --git a/fs/inode.c b/fs/inode.c > index 260a8a1c1096..d19f70422a5d 100644 > --- a/fs/inode.c > +++ b/fs/inode.c > @@ -22,6 +22,9 @@ > #include > #include > #include > +#define CREATE_TRACE_POINTS > +#include > + > #include "internal.h" > =20 > /* > @@ -2598,6 +2601,7 @@ EXPORT_SYMBOL(inode_nohighmem); > =20 > struct timespec64 inode_set_ctime_to_ts(struct inode *inode, struct time= spec64 ts) > { > + trace_inode_set_ctime_to_ts(inode, &ts); > set_normalized_timespec64(&ts, ts.tv_sec, ts.tv_nsec); > inode->i_ctime_sec =3D ts.tv_sec; > inode->i_ctime_nsec =3D ts.tv_nsec; > @@ -2683,6 +2687,7 @@ struct timespec64 inode_set_ctime_current(struct in= ode *inode) > =20 > /* No need to cmpxchg if it's exactly the same */ > if (cns =3D=3D now.tv_nsec && inode->i_ctime_sec =3D=3D now.tv_sec) > + trace_ctime_xchg_skip(inode, &now); > goto out; I just realized I sent out an earlier version that has the above bug in it (missing curly braces). The version I tested, and the version in my public tree have this bug fixed. > cur =3D cns; > retry: > @@ -2690,6 +2695,7 @@ struct timespec64 inode_set_ctime_current(struct in= ode *inode) > if (try_cmpxchg(&inode->i_ctime_nsec, &cur, now.tv_nsec)) { > /* If swap occurred, then we're (mostly) done */ > inode->i_ctime_sec =3D 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 a449626fd460..9eb6d9b2d010 100644 > --- a/fs/stat.c > +++ b/fs/stat.c > @@ -23,6 +23,8 @@ > #include > #include > =20 > +#include > + > #include "internal.h" > #include "mount.h" > =20 > @@ -52,6 +54,7 @@ void fill_mg_cmtime(struct kstat *stat, u32 request_mas= k, struct inode *inode) > if (!(stat->ctime.tv_nsec & I_CTIME_QUERIED)) > stat->ctime.tv_nsec =3D ((u32)atomic_fetch_or(I_CTIME_QUERIED, pcn)); > stat->ctime.tv_nsec &=3D ~I_CTIME_QUERIED; > + trace_fill_mg_cmtime(inode, &stat->ctime, &stat->mtime); > } > EXPORT_SYMBOL(fill_mg_cmtime); > =20 > diff --git a/include/trace/events/timestamp.h b/include/trace/events/time= stamp.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 =3D inode->i_sb->s_dev; > + __entry->ino =3D inode->i_ino; > + __entry->gen =3D inode->i_generation; > + __entry->ctime_s =3D ctime->tv_sec; > + __entry->ctime_ns =3D ctime->tv_nsec; > + ), > + > + TP_printk("ino=3D%d:%d:%ld:%u ctime=3D%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 =3D inode->i_sb->s_dev; > + __entry->ino =3D inode->i_ino; > + __entry->gen =3D inode->i_generation; > + __entry->old =3D old; > + __entry->new =3D new; > + __entry->cur =3D cur; > + ), > + > + TP_printk("ino=3D%d:%d:%ld:%u old=3D%u:%s new=3D%u cur=3D%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 =3D inode->i_sb->s_dev; > + __entry->ino =3D inode->i_ino; > + __entry->gen =3D inode->i_generation; > + __entry->ctime_s =3D ctime->tv_sec; > + __entry->mtime_s =3D mtime->tv_sec; > + __entry->ctime_ns =3D ctime->tv_nsec; > + __entry->mtime_ns =3D mtime->tv_nsec; > + ), > + > + TP_printk("ino=3D%d:%d:%ld:%u ctime=3D%lld.%u mtime=3D%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 >=20 --=20 Jeff Layton