lkml.org 
[lkml]   [2009]   [Jan]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86: remove byte locks

* Jiri Kosina <jkosina@suse.cz> wrote:

> On Thu, 15 Jan 2009, Ingo Molnar wrote:
>
> > > > > Why can't this just be somewhere in documentation? (possibly even with
> > > > > the byte locks code as a reference).
> > > > Because Ingo's compil-o-matic will never fail on a documentation error.
> > >
> > > Hmm, I have always considered the "we don't accept any code that would
> > > have zero in-kernel users" rule as a quite reasonable one, at least in
> > > order to prevent from bloat and code getting confusing.
> > > But apparently it's not the intention here.
> > >
> > > > > It is IMHO just totally confusing to have a spinlock implementation that is
> > > > > not used at all in the tree. It took me quite some time to go through this
> > > > > until I finally figured out that this code is actually never used.
> > > > > Currently, on first sight it might seem that byte locks are used whenever
> > > > > CONFIG_PARAVIRT is set, which is not true.
> > > > Well, a comment next to the code explaining the rationale probably
> > > > wouldn't go astray.
> > >
> > > I still strongly feel that if the only purpose of the code in kernel is
> > > "to provide example", then it belongs to documentation.
> > >
> > > > > And apparently even Linus got confused by this, which also tells us
> > > > > something by itself, see [1].
> > > > > [1] http://marc.info/?l=linux-kernel&m=123144211719754&w=2
> > > > It tells us that Linus couldn't give a rat's arse about virtualization,
> > > > which is just something we have to cope with ;)
> > >
> > > I am afraid this has nothing to do with virtualization. It's simply
> > > confusing when looking at the code.
> >
> > i'd tend to agree, that area of code is quite complex already.
>
> ping, any final word here? Should I consider the silence a implicit nak,
> or should I resend the patch?

ok - i've applied it to tip/x86/cleanups.

Ingo


\
 
 \ /
  Last update: 2009-01-20 17:19    [W:1.191 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site