linux-kernel - Re: [PATCH] ia64: enable HAVE_COPY_THREAD_TLS, switch to kernel_clone

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Message-ID: <20200514075001.c63f3isbialsacpd@wittgenstein>
Date:   Thu, 14 May 2020 09:50:01 +0200
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     "Luck, Tony" <tony.luck@...el.com>
Cc:     "Yu, Fenghua" <fenghua.yu@...el.com>,
        "linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Qais Yousef <qais.yousef@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ia64: enable HAVE_COPY_THREAD_TLS, switch to
 kernel_clone_args

On Wed, May 13, 2020 at 09:19:41PM +0000, Luck, Tony wrote:
> > I tried my very best to test this patch including installing Debian 3
> > and 4 to try and get my hands on a gcc version that would allow
> > cross-compiling for ia64. But no, even that wasn't possible let alone a
> > working qemu for ia64. So this is largely untested but hopefully a
> > straightforward change. If this breaks something we will hear from
> > people if they still care about new kernels on ia64 since they won't be
> > able to get any further than trying to start init. :) If this patch
> > breaks it, I'll fix it.
> 
> My last functional ia64 machine no longer powers on. Unclear if it's just
> a broken power supply or something more serious. With almost nobody
> in offices/labs anymore my search for another machine is proceeding
> slowly.

Ah. :/

> 
> Which is to say ... it won't be me noticing any breakage (at least not for
> a while).

If we can't get it tested on a machine soon, would you still be ok
proceeding with this patch?

> 
> I think Al Viro bought an ia64 on ebay a while back ... if that's still running
> perhaps he'll test?

I have to admit, that out of pure desperation I considered buying on too
on ebay. But they are still suprisingly pricy.

Christian