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Wed, 17 Jul 2024 10:41:19 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id V0aqHM+fl2byPAAAD6G6ig (envelope-from ); Wed, 17 Jul 2024 10:41:19 +0000 Received: by quack3.suse.cz (Postfix, from userid 1000) id 232CEA0987; Wed, 17 Jul 2024 12:41:19 +0200 (CEST) Date: Wed, 17 Jul 2024 12:41:19 +0200 From: Jan Kara To: Jeff Layton Cc: Alexander Viro , Christian Brauner , Jan Kara , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Chandan Babu R , "Darrick J. Wong" , Theodore Ts'o , Andreas Dilger , Chris Mason , Josef Bacik , David Sterba , Hugh Dickins , Andrew Morton , Jonathan Corbet , Dave Chinner , Andi Kleen , Christoph Hellwig , Uros Bizjak , Kent Overstreet , Arnd Bergmann , Randy Dunlap , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-mm@kvack.org, linux-nfs@vger.kernel.org, linux-doc@vger.kernel.org Subject: Re: [PATCH v6 2/9] fs: tracepoints around multigrain timestamp events Message-ID: <20240717104119.qoatft3q3d2qu6mh@quack3> References: <20240715-mgtime-v6-0-48e5d34bd2ba@kernel.org> <20240715-mgtime-v6-2-48e5d34bd2ba@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240715-mgtime-v6-2-48e5d34bd2ba@kernel.org> X-Rspamd-Action: no action X-Stat-Signature: 1myw863qrruhemp7gpayeb64ef8m5odo X-Rspam-User: X-Rspamd-Queue-Id: 06B7F1C000C X-Rspamd-Server: rspam02 X-HE-Tag: 1721212880-88127 X-HE-Meta: U2FsdGVkX18rJVj+dgozGJTwTIqT47rVq3sPDRE7cawfTSA0tmxWloqA9ki8MaS/NqCmwNhRP4PxcY09B6YLFPJurOhAs89UaOkH91DU8S7y6jA+S01FjX2Am+q3kfafYzeXv2LrKTgXEKVQjwAxrPKs8AnzLtdwkjhodNA8hiwG2KsueokOGQulfbYk7+f3pZb9rDy7GxaVG8MhVta/qJcBrsCCiuS0tah//3LhnFomNkp/uTrxlUoHjIudpWLHhsRNkdumDn9419XyG6RtTkxo+Pdhm4tppMNz3dqdffoAPkB/6cyAAyldZtFZoPkBLqzGJlr6mLm6CWgerQiwu7dHKN3DY+i4neCVV4+WlVMmvL1bmY6P5k8mNRHWImfIqoS0h3JhHY8XTpVBQffskHZ1k/EEOPyQp+sSRuqIpD3m/DDb58kMW7kj/maX9CPJfrjVow+hV5JCv/2hZ1cUUfhct7PoQsxcNEXcMR57HIteUBDfytQAGLTQLfd2XiGK3nUqpEQW1Rt6kdk8SlLoO0cC4dq615E68Ql/z/S4e7+0IuSQJ5U6a/cehtteS4zK483JOY2Ws9MOB6leyn3yHK/Py7HgIUKe0o4rfVlMozXIiesTX6rlae/BA6qEVkdEfV/9sfB76blcRrzq0ztyUiNR8MEbJ/VybDpyIgpgtR9+68UjJ6Jet71CjElcMJMpeWt901RSb22CGLeHVwqF+onQRZULKARgSYQGdOK+T+BLiT125Zd99R+8yksDoMvPb1QT+lWz3cw+SFyY7KH6Zyixgop1jjnKbXlbEmOzM7mF23t2v52EKEpwopn6KD6Ohh2Gn6YC/pZnx1EYLrJFECjugj6Jg62qv9Lsi2UUITnev7k3rO7khxo8m+Jo09zazRkFIVudORzNRgoTL5T9A3tFngH0WWUzVP/GSv86ADziRNltO6opptUfkxKlRwAK+hgPOCdUJvQpesOHdOB SI3aoZ7S 3bBOgJtJwV8i5Lq3iwF2YjbrXHbgWeaeCiyNSM2g7RzrRhI8eyqKjS/F2tV5DLjC3rNwKqAEbwW82pYgAlyoYsqVcf/HPWttNDO8ejL60gqkRmFpbXfEJSEvCDrjtbLb+072uELNDKqqDc1NXw5nqtVkCgEAieUA4VH5zKMyMAab7vFKU7i0g1BKnpCQxOsYTZSDF2J7pXN//Gp7nLqku3aCDtp1hkUlk4m6We7/LrudwPszE8jzd7iY/u3TUzxZ9SOR/MzLFEMvzuG5wpG5/ad34RB7puVdfwvvUMGglM9KlBD/HNgwFwbmnzimCn8LvyShYXvAUDNUYyS+khAyLV01m/XLFyyWsPuiIOaaAy3Uca1kWxKheeIN0ZmtA8GfbvVbZ+Uj8Kpwf1fA+ysfFoiyIqTszV9BNLFxyiQy2xBFUKjcFBeAOfkUBMQ== 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 Mon 15-07-24 08:48:53, Jeff Layton wrote: > Add some tracepoints around various multigrain timestamp events. > > Reviewed-by: Josef Bacik > Signed-off-by: Jeff Layton Looks good to me. Feel free to add: Reviewed-by: Jan Kara Honza > --- > 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 417acbeabef3..869994285e87 100644 > --- a/fs/inode.c > +++ b/fs/inode.c > @@ -22,6 +22,9 @@ > #include > #include > #include > +#define CREATE_TRACE_POINTS > +#include > + > #include "internal.h" > > /* > @@ -2569,6 +2572,7 @@ 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; > @@ -2668,13 +2672,16 @@ struct timespec64 inode_set_ctime_current(struct inode *inode) > cur = cns; > > /* No need to cmpxchg if it's exactly the same */ > - if (cns == now_ts.tv_nsec && inode->i_ctime_sec == now_ts.tv_sec) > + if (cns == now_ts.tv_nsec && inode->i_ctime_sec == now_ts.tv_sec) { > + trace_ctime_xchg_skip(inode, &now_ts); > goto out; > + } > retry: > /* Try to swap the nsec value into place. */ > if (try_cmpxchg(&inode->i_ctime_nsec, &cur, now_ts.tv_nsec)) { > /* If swap occurred, then we're (mostly) done */ > inode->i_ctime_sec = now_ts.tv_sec; > + trace_ctime_ns_xchg(inode, cns, now_ts.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 df7fdd3afed9..552dfd67688b 100644 > --- a/fs/stat.c > +++ b/fs/stat.c > @@ -23,6 +23,8 @@ > #include > #include > > +#include > + > #include "internal.h" > #include "mount.h" > > @@ -49,6 +51,7 @@ void fill_mg_cmtime(struct kstat *stat, u32 request_mask, struct inode *inode) > stat->mtime = inode_get_mtime(inode); > stat->ctime.tv_sec = inode->i_ctime_sec; > stat->ctime.tv_nsec = ((u32)atomic_fetch_or(I_CTIME_QUERIED, pcn)) & ~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 > > -- > 2.45.2 > -- Jan Kara SUSE Labs, CR