linux-kernel - Re: [RFC PATCH] mm: trace filemap add and del

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Message-ID: <87obir5jhz.fsf@free.fr>
Date:	Wed, 21 Nov 2012 11:38:00 +0100
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Dave Chinner <david@...morbit.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] mm: trace filemap add and del

Dave Chinner <david@...morbit.com> writes:
> We actually have an informal convention for formating filesystem
> trace events, and that is to use the device number....
>
>> 
>> > +	),
>> > +
>> > +	TP_printk("page=%p pfn=%lu blk=%d:%d inode+ofs=%lu+%lu",
>
> ... and to prefix messages like:
>
> 	TP_printk("dev %d:%d ino 0x%llx ....
> 		  MAJOR(__entry->dev), MINOR(__entry->dev),
Right, it's sensible. I'll include that for patch V2.

> XFS, ext3/4, jbd/jdb2 and gfs2 follow this convention, so we should
> keep propagating that pattern in the name of consistency, rather
> than having different trace formats for different parts of the
> VFS/FS layers...
Very true.

Cheers.

-- 
Robert
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