From: Ritesh Harjani <riteshh@linux.ibm.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-ext4@vger.kernel.org, Jan Kara <jack@suse.cz>,
"Theodore Ts'o" <tytso@mit.edu>,
Harshad Shirwadkar <harshadshirwadkar@gmail.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCHv2 00/10] ext4: Improve FC trace events
Date: Fri, 11 Mar 2022 20:33:57 +0530 [thread overview]
Message-ID: <20220311150357.x6wpvzthsimb26m6@riteshh-domain> (raw)
In-Reply-To: <20220311094524.1fa2d98f@gandalf.local.home>
On 22/03/11 09:45AM, Steven Rostedt wrote:
> On Fri, 11 Mar 2022 10:42:49 +0530
> Ritesh Harjani <riteshh@linux.ibm.com> wrote:
>
> > You may add below, if you like:-
> >
> > Reported-and-tested-by: Ritesh Harjani <riteshh@linux.ibm.com>
>
> Will do. Thanks for testing.
>
> I'll be adding this for the next merge window. I don't think this is
> something that needs to be added to this rc release nor stable. Do you
> agree?
If using an enum in TP_STRUCT__entry's __array field doesn't cause any side
effect other than it just can't be decoded by userspace perf record / trace-cmd,
then I guess it should be ok.
But for this PATCH 2/10 "ext4: Fix ext4_fc_stats trace point", will be
needed to be Cc'd to stable tree as discussed before, as it tries to
dereference some sbi pointer from the tracing ring buffer. Then hopefully the
only problem with previous kernel version would be that ext4_fc_stats(), won't
show proper values for array entries in older kernel version where this patch
of trace_events is not found.
But cat /sys/kernel/debug/tracing/trace_pipe should be able to show the right values.
From my side, I will send a v3 of this patch series with just EXT4_FC_REASON_MAX
defined using TRACE_DEFINE_ENUM.
Thanks again for your help :)
-ritesh
>
> -- Steve
next prev parent reply other threads:[~2022-03-11 15:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-10 15:58 [PATCHv2 00/10] ext4: Improve FC trace events Ritesh Harjani
2022-03-10 15:58 ` [PATCHv2 01/10] ext4: Remove unused enum EXT4_FC_COMMIT_FAILED Ritesh Harjani
2022-03-10 15:58 ` [PATCHv2 02/10] ext4: Fix ext4_fc_stats trace point Ritesh Harjani
2022-03-10 15:58 ` [PATCHv2 03/10] ext4: Convert ext4_fc_track_dentry type events to use event class Ritesh Harjani
2022-03-10 15:58 ` [PATCHv2 04/10] ext4: Do not call FC trace event in ext4_fc_commit() if FS does not support FC Ritesh Harjani
2022-03-10 15:58 ` [PATCHv2 05/10] ext4: Return early for non-eligible fast_commit track events Ritesh Harjani
2022-03-10 15:59 ` [PATCHv2 06/10] ext4: Add new trace event in ext4_fc_cleanup Ritesh Harjani
2022-03-10 15:59 ` [PATCHv2 07/10] ext4: Add transaction tid info in fc_track events Ritesh Harjani
2022-03-10 15:59 ` [PATCHv2 08/10] ext4: Add commit_tid info in jbd debug log Ritesh Harjani
2022-03-10 15:59 ` [PATCHv2 09/10] ext4: Add commit tid info in ext4_fc_commit_start/stop trace events Ritesh Harjani
2022-03-10 15:59 ` [PATCHv2 10/10] ext4: Fix remaining two trace events to use same printk convention Ritesh Harjani
2022-03-10 16:05 ` [PATCHv2 00/10] ext4: Improve FC trace events Steven Rostedt
2022-03-10 17:07 ` Ritesh Harjani
2022-03-11 0:39 ` Steven Rostedt
2022-03-11 2:19 ` Ritesh Harjani
2022-03-11 2:33 ` Steven Rostedt
2022-03-11 3:14 ` Ritesh Harjani
2022-03-11 4:32 ` Steven Rostedt
2022-03-11 5:12 ` Ritesh Harjani
2022-03-11 14:45 ` Steven Rostedt
2022-03-11 15:03 ` Ritesh Harjani [this message]
2022-03-11 16:42 ` Steven Rostedt
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