linux-ext4 - Re: 回复：[PATCH -next] jbd2: use the correct print format

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Date:   Fri, 22 Apr 2022 11:14:55 +0200
From:   Jan Kara <jack@...e.cz>
To:     cuibixuan <cuibixuan@...ux.alibaba.com>
Cc:     Jan Kara <jack@...e.cz>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        rostedt <rostedt@...dmis.org>, mingo <mingo@...hat.com>,
        "yi.zhang" <yi.zhang@...wei.com>, linux-ext4@...r.kernel.org,
        Ted Tso <tytso@....edu>
Subject: Re: 回复：[PATCH -next] jbd2: use
 the correct print format

Hello,

thanks for noticing. It is probably because this patch was not CCed neither
to ext4 development mailing list, nor to the ext4 maintainer. Added now.
Ted, can you please pick up this patch? Lore has it so b4, can pick it up
just fine. Thanks!

								Honza

On Fri 22-04-22 10:42:51, cuibixuan wrote:
> Hi, 
> This patch doesn't seem to be merged into the next branch.  :-)
> 
> Thanks,
> Bixuan Cui
> 
> On Fri 18-03-22 23:56:40, Bixuan Cui wrote:
> 
> > The print format error was found when using ftrace event:
> >     <...>-1406 [000] .... 23599442.895823: jbd2_end_commit: dev 252,8 transaction -1866216965 sync 0 head -1866217368
> >     <...>-1406 [000] .... 23599442.896299: jbd2_start_commit: dev 252,8 transaction -1866216964 sync 0
> > 
> > Print transaction and head with the unsigned format "%u" instead.
> > 
> > Fixes: 879c5e6b7cb4 ('jbd2: convert instrumentation from markers to tracepoints')
> > Signed-off-by: Bixuan Cui <cuibixuan@...ux.alibaba.com>
> 
> Makes sense. Thanks for the fix. Feel free to add:
> 
> Reviewed-by: Jan Kara <jack@...e.cz>
> 
>         Honza
> 
> > ---
> >  include/trace/events/jbd2.h | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> > 
> > diff --git a/include/trace/events/jbd2.h b/include/trace/events/jbd2.h
> > index a4dfe005983d..5be1aa1691fb 100644
> > --- a/include/trace/events/jbd2.h
> > +++ b/include/trace/events/jbd2.h
> > @@ -40,7 +40,7 @@ DECLARE_EVENT_CLASS(jbd2_commit,
> >   TP_STRUCT__entry(
> >    __field( dev_t, dev   )
> >    __field( char, sync_commit    )
> > -  __field( int, transaction    )
> > +  __field( tid_t, transaction    )
> >   ),
> >  
> >   TP_fast_assign(
> > @@ -49,7 +49,7 @@ DECLARE_EVENT_CLASS(jbd2_commit,
> >    __entry->transaction = commit_transaction->t_tid;
> >   ),
> >  
> > - TP_printk("dev %d,%d transaction %d sync %d",
> > + TP_printk("dev %d,%d transaction %u sync %d",
> >      MAJOR(__entry->dev), MINOR(__entry->dev),
> >      __entry->transaction, __entry->sync_commit)
> >  );
> > @@ -97,8 +97,8 @@ TRACE_EVENT(jbd2_end_commit,
> >   TP_STRUCT__entry(
> >    __field( dev_t, dev   )
> >    __field( char, sync_commit    )
> > -  __field( int, transaction    )
> > -  __field( int, head       )
> > +  __field( tid_t, transaction    )
> > +  __field( tid_t, head       )
> >   ),
> >  
> >   TP_fast_assign(
> > @@ -108,7 +108,7 @@ TRACE_EVENT(jbd2_end_commit,
> >    __entry->head  = journal->j_tail_sequence;
> >   ),
> >  
> > - TP_printk("dev %d,%d transaction %d sync %d head %d",
> > + TP_printk("dev %d,%d transaction %u sync %d head %u",
> >      MAJOR(__entry->dev), MINOR(__entry->dev),
> >      __entry->transaction, __entry->sync_commit, __entry->head)
> >  );
> > -- 
> > 2.19.1.6.gb485710b
> > 
> -- 
> Jan Kara <jack@...e.com>
> SUSE Labs, CR
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR