From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 A68C942E8C8 for ; Thu, 27 Aug 2026 12:26:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787833566; cv=none; b=jPBAmD7+BT8dMp2DuTb9PM64Nqzxj7aFvrdJLpXsPUbvybxqZ4kUdtGdOWnC91LaHpaXM5HSU9HpdnrqjGxCfuRl0zhTaiXXPZU6GJ1vnBFk7FPg96GOqerD6Yg1w0hXNUyPnvJH6b32ude2DDizuBILS3M9LPmFNOhoAW64ngw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787833566; c=relaxed/simple; bh=YJvo5IgpYITZOQ4rbOnBiZ+i0kbmKToYReCov7ZhA8M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eISPd0GxcMc0/guIYLYIraAdRmX2C6qx3nGmp3xa0+jlQGzFcPOB1lDzPpSqrlqrQHYCDzADqKkgIYHDvOa2W6enF3f//d/tG0O2Yj1s7LI4E3kukN6gTW+7upfSx0CDten5blOetYspc23Pl6WWyBukkYSeioNfYQIS9U6iLSw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ockSCJJY; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ockSCJJY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0752C1F00A3A; Thu, 27 Aug 2026 12:26:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787833562; bh=Cu9PFx55WJ08UD0e/D4LO3Ujy6+64QlHMwymiRKZpQY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ockSCJJYhYY0C7LyUkFL8vCyRTJYNOuGmeC2XZ7i/S6Im1PTCLoPnMtbT+lmQmW/n NRduXhKJU6AWjp46urdQd6MIRvm2DsCBwoMGbNi1vRqo1K2O8LbpI/1056v8wJZqNi r30o40zywhnt/Vs/iClv3zaPDFlck2QMDXcI7X1AbEISnPAPFunbw/IIdx8Evbv/Ik 8YQfmu58vUS+0vE+gNDSXkROnV7a6zpbWgHxJNciWIL2xHAwfwc6i2cZuakzz5b4Xt eI9uUBVjPGLJONJZsTINUvGlWI1qy71vacuYrqrucxE6gjZHatu6rPkXT2/MZQrg+v /d5ykj8GzzyRA== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH v4 11/12] f2fs: cache: introduce tracepoints Date: Thu, 27 Aug 2026 20:25:39 +0800 Message-ID: <20260827122541.19967-12-chao@kernel.org> X-Mailer: git-send-email 2.55.0.887.g758fc8c411-goog In-Reply-To: <20260827122541.19967-1-chao@kernel.org> References: <20260827122541.19967-1-chao@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chao Yu This patch introduces ftrace tracepoints to observe and profile metadata cache operations: - trace_f2fs_cache_set_dirty to trace marking a cached block dirty - trace_f2fs_write_cache to trace single block writeback submission - trace_f2fs_write_caches to tracesbatch writeback and sync sessions Signed-off-by: Chao Yu --- fs/f2fs/cache.c | 3 ++ fs/f2fs/checkpoint.c | 6 ++++ fs/f2fs/segment.c | 3 ++ include/trace/events/f2fs.h | 71 +++++++++++++++++++++++++++++++++++++ 4 files changed, 83 insertions(+) diff --git a/fs/f2fs/cache.c b/fs/f2fs/cache.c index 2a98479bb3db..da2ee8f00560 100644 --- a/fs/f2fs/cache.c +++ b/fs/f2fs/cache.c @@ -15,6 +15,7 @@ #include "f2fs.h" #include "cache.h" #include "node.h" +#include #include "segment.h" void f2fs_cache_wait_writeback_cond(struct f2fs_cached_block *entry, @@ -76,6 +77,8 @@ bool f2fs_mark_cache_dirty(struct f2fs_cached_block *entry) enum count_type type = IS_META_CACHE(cache) ? F2FS_DIRTY_META : F2FS_DIRTY_NODES; + trace_f2fs_cache_set_dirty(entry, + IS_META_CACHE(cache) ? META : NODE); f2fs_cache_update_tag(entry, F2FS_CACHE_TAG_NONE, F2FS_CACHE_TAG_DIRTY); inc_page_count(cache->sbi, type); diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 6a93873a8958..a82e41a0b437 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -551,6 +551,8 @@ static bool __f2fs_write_meta_cache(struct f2fs_cached_block *entry, { struct f2fs_sb_info *sbi = entry->cache->sbi; + trace_f2fs_write_cache(entry, META); + if (unlikely(f2fs_cp_error(sbi))) { if (is_sbi_flag_set(sbi, SBI_IS_CLOSE)) { f2fs_force_clear_cache_dirty(entry); @@ -609,6 +611,8 @@ long f2fs_sync_meta_caches(struct f2fs_sb_info *sbi, long nr_to_write, struct blk_plug plug; bool background = nr_to_write != LONG_MAX; + trace_f2fs_write_caches(sbi, nr_to_write, 0, META); + blk_start_plug(&plug); while ((nr = f2fs_cache_gang_lookup_tag(META_CACHE(sbi), entries, @@ -664,6 +668,8 @@ long f2fs_sync_meta_caches(struct f2fs_sb_info *sbi, long nr_to_write, blk_finish_plug(&plug); + trace_f2fs_write_caches(sbi, nr_to_write, nwritten, META); + return nwritten; } diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 1812151200f6..14b809a8220b 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -4171,6 +4171,9 @@ void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio) { struct f2fs_summary sum; + if (fio->is_cache) + trace_f2fs_write_cache(fio->cache_entry, NODE); + set_summary(&sum, nid, 0, 0); do_write_page(&sum, fio); diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index d53be932df01..df4cd346ae72 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -1430,6 +1430,50 @@ DEFINE_EVENT(f2fs__folio, f2fs_set_page_dirty, TP_ARGS(folio, type) ); +DECLARE_EVENT_CLASS(f2fs__cached_block, + + TP_PROTO(struct f2fs_cached_block *block, int type), + + TP_ARGS(block, type), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(pgoff_t, index) + __field(int, type) + __field(int, dirty) + __field(int, uptodate) + ), + + TP_fast_assign( + __entry->dev = block->cache->sbi->sb->s_dev; + __entry->index = block->index; + __entry->type = type; + __entry->dirty = f2fs_cache_test_dirty(block); + __entry->uptodate = f2fs_cache_test_uptodate(block); + ), + + TP_printk("dev = (%d,%d), %s, index = %lu, dirty = %d, uptodate = %d", + show_dev(__entry->dev), + show_block_type(__entry->type), + (unsigned long)__entry->index, + __entry->dirty, + __entry->uptodate) +); + +DEFINE_EVENT(f2fs__cached_block, f2fs_write_cache, + + TP_PROTO(struct f2fs_cached_block *block, int type), + + TP_ARGS(block, type) +); + +DEFINE_EVENT(f2fs__cached_block, f2fs_cache_set_dirty, + + TP_PROTO(struct f2fs_cached_block *block, int type), + + TP_ARGS(block, type) +); + TRACE_EVENT(f2fs_replace_atomic_write_block, TP_PROTO(struct inode *inode, struct inode *cow_inode, pgoff_t index, @@ -1574,6 +1618,33 @@ TRACE_EVENT(f2fs_writepages, __entry->for_sync) ); +TRACE_EVENT(f2fs_write_caches, + + TP_PROTO(struct f2fs_sb_info *sbi, long nr_to_write, long nwritten, int type), + + TP_ARGS(sbi, nr_to_write, nwritten, type), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(long, nr_to_write) + __field(long, nwritten) + __field(int, type) + ), + + TP_fast_assign( + __entry->dev = sbi->sb->s_dev; + __entry->nr_to_write = nr_to_write; + __entry->nwritten = nwritten; + __entry->type = type; + ), + + TP_printk("dev = (%d,%d), %s, nr_to_write = %ld, nwritten = %ld", + show_dev(__entry->dev), + show_block_type(__entry->type), + __entry->nr_to_write, + __entry->nwritten) +); + TRACE_EVENT(f2fs_readpages, TP_PROTO(struct inode *inode, pgoff_t start, unsigned int nrpage), -- 2.49.0