linux-ext4 - [RFC 20/20] ext4: Add process name and pid in ext4

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Date:   Fri,  1 May 2020 12:00:02 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     linux-ext4@...r.kernel.org
Cc:     "Paul E . McKenney" <paulmck@...nel.org>,
        linux-fsdevel@...r.kernel.org, Jan Kara <jack@...e.com>,
        tytso@....edu, "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        Ritesh Harjani <riteshh@...ux.ibm.com>
Subject: [RFC 20/20] ext4: Add process name and pid in ext4_msg()

This adds process name and pid for ext4_msg().
I found this to be useful. For e.g. below print gives more
info about process name and pid.

[ 7671.131912]  [mount/12543] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: acl,user_xattr

Signed-off-by: Ritesh Harjani <riteshh@...ux.ibm.com>
---
 fs/ext4/super.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index bf5fcb477f66..5067a47f4f46 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -756,7 +756,8 @@ void __ext4_msg(struct super_block *sb,
 	va_start(args, fmt);
 	vaf.fmt = fmt;
 	vaf.va = &args;
-	printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);
+	printk("%s [%s/%d] EXT4-fs (%s): %pV\n", prefix, current->comm,
+		task_pid_nr(current), sb->s_id, &vaf);
 	va_end(args);
 }
 
-- 
2.21.0