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From: Andy Lutomirski <luto@amacapital.net>
Date: Fri, 29 Apr 2016 13:25:04 -0700
Message-ID: <CALCETrWQUEKKvVcHV+KtuBD=MadaRbvqJGoRipFWmKLCS3T08A@mail.gmail.com>
Subject: Re: [PATCH v4 0/10] x86/xsaves: Fix XSAVES known issues
To: Yu-cheng Yu <yu-cheng.yu@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>, X86 ML <x86@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@suse.de>,
        Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
        "Ravi V. Shankar" <ravi.v.shankar@intel.com>,
        Fenghua Yu <fenghua.yu@intel.com>
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On Fri, Apr 29, 2016 at 1:07 PM, Yu-cheng Yu <yu-cheng.yu@intel.com> wrote:
> On Fri, Apr 29, 2016 at 01:03:43PM -0700, Dave Hansen wrote:
>> That's not feasible.  Think of dynamic libraries or just-in-time
>> compilers.  What instruction set does /usr/bin/java use, for instance? :)
>
> The java argument is true. In that case or when the bitmask is missing, we can allocate for all supported features.
>

I actually want to see us moving in the direction of unconditionally
allocating everything on process startup.  If we can stop using CR0.TS
entirely, I think everything will be better.

--Andy