linux-kernel - [PATCH v2 3/3] ext4: add needed paramter to ext4_mb_discard

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Message-ID: <34718b7d-9e0c-e8a9-cdef-9150fc5edab8@gmail.com>
Date:   Wed, 5 Aug 2020 09:02:18 +0800
From:   brookxu <brookxu.cn@...il.com>
To:     tytso@....edu, adilger.kernel@...ger.ca,
        linux-kernel@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org
Subject: [PATCH v2 3/3] ext4: add needed paramter to
 ext4_mb_discard_preallocations trace

Add the needed value to ext4_mb_discard_preallocations trace, so
we can more easily observe the requested number of trim.

Signed-off-by: Chunguang Xu <brookxu@...cent.com>
---
 include/trace/events/ext4.h | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index cc41d69..61736d8 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -746,24 +746,26 @@
 );
 
 TRACE_EVENT(ext4_discard_preallocations,
-    TP_PROTO(struct inode *inode),
+    TP_PROTO(struct inode *inode, unsigned int needed),
 
-    TP_ARGS(inode),
+    TP_ARGS(inode, needed),
 
     TP_STRUCT__entry(
-        __field(    dev_t,    dev            )
-        __field(    ino_t,    ino            )
+        __field(    dev_t,        dev        )
+        __field(    ino_t,        ino        )
+        __field(    unsigned int,    needed        )
 
     ),
 
     TP_fast_assign(
         __entry->dev    = inode->i_sb->s_dev;
         __entry->ino    = inode->i_ino;
+        __entry->needed    = needed;
     ),
 
-    TP_printk("dev %d,%d ino %lu",
+    TP_printk("dev %d,%d ino %lu needed %u",
           MAJOR(__entry->dev), MINOR(__entry->dev),
-          (unsigned long) __entry->ino)
+          (unsigned long) __entry->ino, __entry->needed)
 );
 
 TRACE_EVENT(ext4_mb_discard_preallocations,

-- 
1.8.3.1