linux-kernel - Re: [PATCH 0/10] MAINTAINERS - script, patterns, and misc fixes

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Date:	Tue, 13 Jan 2009 20:26:50 -0800
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	torvalds@...ux-foundation.org, pavel@....cz,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/10] MAINTAINERS - script, patterns, and misc fixes

On Tue, 2009-01-13 at 12:54 -0800, Andrew Morton wrote:
> akpm:/usr/src/git26> ../25/scripts/get_maintainer.pl -f mm/filemap.c 
> Balbir Singh <balbir@...ux.vnet.ibm.com>
> Hugh Dickins <hugh@...itas.com>
> KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Miklos Szeredi <mszeredi@...e.cz>
> Nick Piggin <npiggin@...e.de>
> 
> I think Balbir would be surprised!

get_maintainer output is in alphabetical order,
not ordered by signer frequency.

Balbir Singh is one of the top 5 signers over the last year
for mm/filemap.c excluding you and Linus.

$ git log --since=1-year-ago mm/filemap.c | \
	grep -P "^ +.*by:" | sort | uniq -c | sort -rn | head
     38     Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
     35     Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
     14     Signed-off-by: Nick Piggin <npiggin@...e.de>
      5     Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
      5     Signed-off-by: Hugh Dickins <hugh@...itas.com>
      4     Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
      4     Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>

> My script generates what I consider to be better results:
> 
> akpm:/usr/src/25> who-maintains.sh mm/filemap.c
> Nick Piggin <npiggin@...e.de>
> Hugh Dickins <hugh@...itas.com>
> Fengguang Wu <wfg@...l.ustc.edu.cn>
> Christoph Hellwig <hch@....de>
> Steven Whitehouse <swhiteho@...hat.com>
> Zach Brown <zach.brown@...cle.com>
> Miklos Szeredi <mszeredi@...e.cz>
> Jan Kara <jack@...e.cz>
> Balbir Singh <balbir@...ux.vnet.ibm.com>
> Badari Pulavarty <pbadari@...ibm.com>
> 
> For some (git related) reason it is vastly slower than yours.

I think the major reason is your script is using all git history.
get_maintainer.pl is using just the last calendar year.


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