linux-kernel - Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit?

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Message-ID: <20160112134248.GA2319@infradead.org>
Date:	Tue, 12 Jan 2016 05:42:48 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Borislav Petkov <bp@...en8.de>,
	Christoph Hellwig <hch@...radead.org>,
	Andy Lutomirski <luto@...nel.org>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Brian Gerst <brgerst@...il.com>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit?

On Tue, Jan 12, 2016 at 02:38:20PM +0100, Ingo Molnar wrote:
> > On Fri, Dec 18, 2015 at 12:59:14AM -0800, Christoph Hellwig wrote:
> > > Stupid question, but what the heck is PKRU?  A grep of the kernel tree
> > > shows no results, and a web search returns mostly Thai language results.
> > 
> > That should explain it:
> > 
> > https://lkml.kernel.org/r/20151214190542.39C4886D@viggo.jf.intel.com
> 
> There's also an LWN article from last year, as background:
> 
>   https://lwn.net/Articles/643797/

I had actually seen both the thread and the article before, but the
"PKRU" subject didn't really lead to either..