From: Dave Chinner <david@fromorbit.com>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: sandeen@redhat.com, linux-nfs@vger.kernel.org,
linux-cifs@vger.kernel.org, linux-unionfs@vger.kernel.org,
linux-xfs@vger.kernel.org, linux-mm@kvack.org,
linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
ocfs2-devel@oss.oracle.com
Subject: Re: [PATCH 01/25] xfs: add a per-xfs trace_printk macro
Date: Wed, 10 Oct 2018 11:36:51 +1100 [thread overview]
Message-ID: <20181010003651.GH6311@dastard> (raw)
In-Reply-To: <153913024554.32295.8692450593333636905.stgit@magnolia>
On Tue, Oct 09, 2018 at 05:10:45PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
>
> Add a "xfs_tprintk" macro so that developers can use trace_printk to
> print out arbitrary debugging information with the XFS device name
> attached to the trace output.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> ---
> fs/xfs/xfs_error.h | 5 +++++
> 1 file changed, 5 insertions(+)
>
>
> diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
> index 246d3e989c6c..c3d9546b138c 100644
> --- a/fs/xfs/xfs_error.h
> +++ b/fs/xfs/xfs_error.h
> @@ -99,4 +99,9 @@ extern int xfs_errortag_clearall(struct xfs_mount *mp);
> #define XFS_PTAG_SHUTDOWN_LOGERROR 0x00000040
> #define XFS_PTAG_FSBLOCK_ZERO 0x00000080
>
> +/* trace printk version of xfs_err and friends */
> +#define xfs_tprintk(mp, fmt, args...) \
> + trace_printk("dev %d:%d " fmt, MAJOR((mp)->m_super->s_dev), \
> + MINOR((mp)->m_super->s_dev), ##args)
> +
> #endif /* __XFS_ERROR_H__ */
Not convinced this is a good idea. How are you going to ensure code
calling this trace point is not committed?
If we decide to add this, it needs to be a CONFIG_XFS_DEBUG=y only
definition because trace_printk() is only for temporary debugging
code and has substantial performance overheads even when these trace
points are not being traced.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2018-10-10 0:36 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-10 0:10 [PATCH v2 00/25] fs: fixes for serious clone/dedupe problems Darrick J. Wong
2018-10-10 0:10 ` [PATCH 01/25] xfs: add a per-xfs trace_printk macro Darrick J. Wong
2018-10-10 0:36 ` Dave Chinner [this message]
2018-10-10 15:00 ` [PATCH v2 " Darrick J. Wong
2018-10-10 0:10 ` [PATCH 02/25] xfs: refactor clonerange preparation into a separate helper Darrick J. Wong
2018-10-10 0:10 ` [PATCH 03/25] xfs: zero posteof blocks when cloning above eof Darrick J. Wong
2018-10-10 0:11 ` [PATCH 04/25] xfs: update ctime and remove suid before cloning files Darrick J. Wong
2018-10-10 0:11 ` [PATCH 05/25] vfs: check file ranges " Darrick J. Wong
2018-10-10 23:06 ` Dave Chinner
2018-10-10 23:13 ` Darrick J. Wong
2018-10-10 0:11 ` [PATCH 06/25] vfs: strengthen checking of file range inputs to generic_remap_checks Darrick J. Wong
2018-10-10 5:23 ` Amir Goldstein
2018-10-10 17:01 ` Darrick J. Wong
2018-10-10 17:26 ` Amir Goldstein
2018-10-10 0:11 ` [PATCH 07/25] vfs: skip zero-length dedupe requests Darrick J. Wong
2018-10-10 0:11 ` [PATCH 08/25] vfs: combine the clone and dedupe into a single remap_file_range Darrick J. Wong
2018-10-10 5:54 ` Amir Goldstein
2018-10-10 15:13 ` Darrick J. Wong
2018-10-10 15:23 ` Amir Goldstein
2018-10-10 0:11 ` [PATCH 09/25] vfs: rename vfs_clone_file_prep to be more descriptive Darrick J. Wong
2018-10-10 0:11 ` [PATCH 10/25] vfs: rename clone_verify_area to remap_verify_area Darrick J. Wong
2018-10-10 0:13 ` [PATCH 11/25] vfs: create generic_remap_file_range_touch to update inode metadata Darrick J. Wong
2018-10-10 0:13 ` [PATCH 12/25] vfs: pass remap flags to generic_remap_file_range_prep Darrick J. Wong
2018-10-10 0:13 ` [PATCH 13/25] vfs: pass remap flags to generic_remap_checks Darrick J. Wong
2018-10-10 0:13 ` [PATCH 14/25] vfs: make remap_file_range functions take and return bytes completed Darrick J. Wong
2018-10-10 6:47 ` Amir Goldstein
2018-10-10 15:50 ` Darrick J. Wong
2018-10-10 18:28 ` Amir Goldstein
2018-10-10 18:32 ` Darrick J. Wong
2018-10-10 0:13 ` [PATCH 15/25] vfs: plumb RFR_* remap flags through the vfs clone functions Darrick J. Wong
2018-10-10 6:22 ` Amir Goldstein
2018-10-10 6:39 ` Amir Goldstein
2018-10-10 0:13 ` [PATCH 16/25] vfs: plumb RFR_* remap flags through the vfs dedupe functions Darrick J. Wong
2018-10-10 0:13 ` [PATCH 17/25] vfs: make remapping to source file eof more explicit Darrick J. Wong
2018-10-10 12:29 ` Amir Goldstein
2018-10-10 16:29 ` Darrick J. Wong
2018-10-10 17:31 ` Amir Goldstein
2018-10-10 0:14 ` [PATCH 18/25] vfs: enable remap callers that can handle short operations Darrick J. Wong
2018-10-10 0:14 ` [PATCH 19/25] vfs: hide file range comparison function Darrick J. Wong
2018-10-10 0:14 ` [PATCH 20/25] vfs: implement opportunistic short dedupe Darrick J. Wong
2018-10-10 0:14 ` [PATCH 21/25] ocfs2: truncate page cache for clone destination file before remapping Darrick J. Wong
2018-10-10 0:14 ` [PATCH 22/25] ocfs2: fix pagecache truncation prior to reflink Darrick J. Wong
2018-10-10 0:14 ` [PATCH 23/25] ocfs2: support partial clone range and dedupe range Darrick J. Wong
2018-10-10 0:14 ` [PATCH 24/25] xfs: fix pagecache truncation prior to reflink Darrick J. Wong
2018-10-10 0:14 ` [PATCH 25/25] xfs: support returning partial reflink results Darrick J. Wong
2018-10-10 1:02 ` [PATCH v2 00/25] fs: fixes for serious clone/dedupe problems Dave Chinner
2018-10-10 1:06 ` Darrick J. Wong
-- strict thread matches above, loose matches on Subject: below --
2018-10-11 4:12 [PATCH v3 " Darrick J. Wong
2018-10-11 4:12 ` [PATCH 01/25] xfs: add a per-xfs trace_printk macro Darrick J. Wong
2018-10-11 13:39 ` Christoph Hellwig
2018-10-11 23:34 ` Darrick J. Wong
2018-10-13 0:05 [PATCH v4 00/25] fs: fixes for serious clone/dedupe problems Darrick J. Wong
2018-10-13 0:05 ` [PATCH 01/25] xfs: add a per-xfs trace_printk macro Darrick J. Wong
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