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Re: anybody tried NPTL?

To: Kumba <kumba@gentoo.org>
Subject: Re: anybody tried NPTL?
From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 6 Aug 2004 04:03:04 +0200
Cc: linux-mips@linux-mips.org
In-reply-to: <411188A8.9040607@gentoo.org>
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References: <20040804152936.D6269@mvista.com> <411188A8.9040607@gentoo.org>
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On Wed, Aug 04, 2004 at 09:08:56PM -0400, Kumba wrote:

> >I am looking into porting NPTL to MIPS.  Just curious if
> >anybody has tried this before.
> >
> >I notice there was a discussion about the ABI extension
> >for TLS (thread local storage) support.  Before that support
> >becomes a reality it seems one can still use NPTL with 
> >the help of additional system calls.
> >
> >A rough search of latest glibc source shows there is
> >zero MIPS code for nptl.  A couple of other arches
> >are missing as well (such as ARM)
> >
> >Jun
> 
> All I've heard about this is that some kernel changes are (still?) 
> needed, then just the glibc support along w/ TLS (Maybe compiler support?).
> 
> I believe I heard reports that the glibc people were looking to 
> deprecate linuxthreads within a another release or two (but don't know 
> specifics or anything), so it sounds like NPTL should be something to 
> get working.

Threading support means breaking the ABI compatibility.  There are other
issues that can best be solved by breakin the ABI which is why this is
stretching out.

  Ralf

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