linux-kernel - Re: [GIT PATCH] STAGING patches for 2.6.31-git

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Date:	Wed, 16 Sep 2009 08:34:16 -0700
From:	Greg KH <greg@...ah.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org
Subject: Re: [GIT PATCH] STAGING patches for 2.6.31-git

On Wed, Sep 16, 2009 at 08:26:14AM -0700, Linus Torvalds wrote:
> 
> 
> On Tue, 15 Sep 2009, Greg KH wrote:
> > 
> > Overall, we almost broke even with our cleanups and removals for what
> > was done here:
> >  1267 files changed, 297615 insertions(+), 214568 deletions(-)
> 
> Actually, it's
> 
>  1253 files changed, 287789 insertions(+), 209389 deletions(-)
> 
> but there are so many changed files that the default rename detection 
> limit kicks in, and your git will have only looked at 100% identical 
> renames. So you missed things like:
> 
>  rename drivers/staging/{rt2860 => rt3090}/link_list.h (99%)
>  copy drivers/staging/{rt2870/md4.h => rt3090/mlme_ex.h} (56%)
>  copy drivers/staging/{rt2860/md4.h => rt3090/mlme_ex_def.h} (67%)
>  copy drivers/staging/{rt2860/md4.h => rt3090/netif_block.h} (72%)
>  rename drivers/staging/{rt2870/md4.h => rt3090/rt33xx.h} (79%)
>  ...
> 
> Now, admittedly the 'copy' ones are dubious: it's picking up on the 
> f*cking Ralink GPL copyright template, which is the bulk of those files. 
> But that in itself is interesting information, even if I personally find 
> mindless copyright templates very annoying.
> 
> Anyway, extended rename detection (ie the non-exact one that can't just 
> look at the SHA1's and say "those are identical") gets disabled if your 
> rename matrix is large (cost function: n*m where 'n' is number of added 
> files, and 'm' is number of deleted ones), which triggers for your staging 
> tree because you had both deletions and creations.
> 
> The default git limit is set fairly low, because it's set for small 
> machines with limited amounts of memory in particular. I suspect you might 
> want to add
> 
> 	[diff]
> 		renamelimit=0
> 
> to your ~/.gitconfig, since you probably don't use particularly weak 
> machines, and that will disable the limiting. Then you'd get the full 
> renames in all their glory.

Ah, ok, will do, didn't know about that.  Thanks for the info.

> Without it, you'll see just:
> 
>  copy drivers/staging/{rtl8192su => rtl8192e}/dot11d.h (100%)
>  rename drivers/staging/{rtl8192su => rtl8192e/ieee80211}/dot11d.h (100%)
>  rename drivers/staging/{rtl8192su => rtl8192e}/ieee80211/rtl_crypto.h (100%)
>  rename drivers/staging/{rtl8187se => rtl8192e}/ieee80211_crypt.h (100%)
> 
> while with it, you'll see examples of lots of cases of header files where 
> there is more copyright header than actual content ;(

Yeah, this company is known for just taking a whole new version of
everything for their next driver, and only changing tiny bits.  It's
something I'm working on getting resolved with them...

thanks,

greg k-h
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