linux-ext4 - Re: [RFCv3 06/10] fs.h: Add TRACE_IOCB

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Date:   Thu, 13 Apr 2023 15:45:37 +0530
From:   Ritesh Harjani (IBM) <ritesh.list@...il.com>
To:     Christian Brauner <brauner@...nel.org>
Cc:     linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
        Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@...radead.org>,
        "Darrick J . Wong" <djwong@...nel.org>,
        Ojaswin Mujoo <ojaswin@...ux.ibm.com>,
        Disha Goel <disgoel@...ux.ibm.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [RFCv3 06/10] fs.h: Add TRACE_IOCB_STRINGS for use in trace points

Christian Brauner <brauner@...nel.org> writes:

Hi Christian

Thanks for your review!

> On Thu, Apr 13, 2023 at 02:10:28PM +0530, Ritesh Harjani (IBM) wrote:
>> Add TRACE_IOCB_STRINGS macro which can be used in the trace point patch to
>> print different flag values with meaningful string output.
>>
>> Tested-by: Disha Goel <disgoel@...ux.ibm.com>
>> Reviewed-by: Christoph Hellwig <hch@....de>
>> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>
>> ---
>
> Fine, but fs.h is such a dumping ground already

Ok, 3205 lines in fs.h.

> I hope we can split more stuff out of it going forward...

Any first thoughts/suggestions like what?

>>  include/linux/fs.h | 14 ++++++++++++++
>>  1 file changed, 14 insertions(+)
>>
>> diff --git a/include/linux/fs.h b/include/linux/fs.h
>> index 9ca3813f43e2..6903fc15987a 100644
>> --- a/include/linux/fs.h
>> +++ b/include/linux/fs.h
>> @@ -340,6 +340,20 @@ enum rw_hint {
>>  /* can use bio alloc cache */
>>  #define IOCB_ALLOC_CACHE	(1 << 21)
>>
>> +/* for use in trace events */
>> +#define TRACE_IOCB_STRINGS \
>> +	{ IOCB_HIPRI, "HIPRI"	}, \
>> +	{ IOCB_DSYNC, "DSYNC"	}, \
>> +	{ IOCB_SYNC, "SYNC"	}, \
>> +	{ IOCB_NOWAIT, "NOWAIT" }, \
>> +	{ IOCB_APPEND, "APPEND" }, \
>> +	{ IOCB_EVENTFD, "EVENTD"}, \
>
> s/EVENTD/EVENTFD/

Oops an oversight. Thanks for catching it.

-ritesh