From: Dave Hansen <dave.hansen@intel.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Qiaowei Ren <qiaowei.ren@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, X86 ML <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux MM <linux-mm@kvack.org>
Subject: Re: [PATCH v6 02/10] x86, mpx: add MPX specific mmap interface
Date: Mon, 23 Jun 2014 13:28:20 -0700 [thread overview]
Message-ID: <53A88DE4.8050107@intel.com> (raw)
In-Reply-To: <CALCETrXYZZiZsDiUvvZd0636+qHP9a0sHTN6wt_ZKjvLaeeBzw@mail.gmail.com>
On 06/23/2014 01:06 PM, Andy Lutomirski wrote:
> Can the new vm_operation "name" be use for this? The magic "always
> written to core dumps" feature might need to be reconsidered.
One thing I'd like to avoid is an MPX vma getting merged with a non-MPX
vma. I don't see any code to prevent two VMAs with different
vm_ops->names from getting merged. That seems like a bit of a design
oversight for ->name. Right?
Thinking out loud a bit... There are also some more complicated but more
performant cleanup mechanisms that I'd like to go after in the future.
Given a page, we might want to figure out if it is an MPX page or not.
I wonder if we'll ever collide with some other user of vm_ops->name. It
looks fairly narrowly used at the moment, but would this keep us from
putting these pages on, say, a tmpfs mount? Doesn't look that way at
the moment.
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next prev parent reply other threads:[~2014-06-23 20:28 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1403084656-27284-1-git-send-email-qiaowei.ren@intel.com>
2014-06-18 14:41 ` [PATCH v6 00/10] Intel MPX support Dave Hansen
[not found] ` <1403084656-27284-3-git-send-email-qiaowei.ren@intel.com>
2014-06-23 19:49 ` [PATCH v6 02/10] x86, mpx: add MPX specific mmap interface Andy Lutomirski
2014-06-23 20:03 ` Dave Hansen
2014-06-23 20:06 ` Andy Lutomirski
2014-06-23 20:28 ` Dave Hansen [this message]
2014-06-23 21:04 ` Andy Lutomirski
2014-06-24 5:53 ` Ren, Qiaowei
2014-06-24 23:55 ` Andy Lutomirski
2014-06-25 1:40 ` Ren, Qiaowei
2014-06-25 21:04 ` Andy Lutomirski
2014-06-25 21:05 ` Andy Lutomirski
2014-06-25 21:45 ` Dave Hansen
2014-06-26 22:19 ` Andy Lutomirski
2014-06-26 22:58 ` Dave Hansen
2014-06-26 23:15 ` Andy Lutomirski
2014-06-27 0:19 ` Dave Hansen
2014-06-27 0:26 ` Andy Lutomirski
2014-06-27 17:34 ` Dave Hansen
2014-06-27 17:42 ` Dave Hansen
2014-06-27 18:57 ` Andy Lutomirski
2014-06-25 21:43 ` Dave Hansen
2014-06-24 2:53 ` Ren, Qiaowei
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