From: Dave Hansen <dave.hansen@intel.com>
To: Qiaowei Ren <qiaowei.ren@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH v7 09/10] x86, mpx: cleanup unused bound tables
Date: Wed, 23 Jul 2014 09:38:17 -0700 [thread overview]
Message-ID: <53CFE4F9.3000701@intel.com> (raw)
In-Reply-To: <1405921124-4230-10-git-send-email-qiaowei.ren@intel.com>
On 07/20/2014 10:38 PM, Qiaowei Ren wrote:
> Since the kernel allocated those tables on-demand without userspace
> knowledge, it is also responsible for freeing them when the associated
> mappings go away.
>
> Here, the solution for this issue is to hook do_munmap() to check
> whether one process is MPX enabled. If yes, those bounds tables covered
> in the virtual address region which is being unmapped will be freed also.
This is the part of the code that I'm the most concerned about.
Could you elaborate on how you've tested this to make sure it works OK?
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next prev parent reply other threads:[~2014-07-23 16:38 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-21 5:38 [PATCH v7 00/10] Intel MPX support Qiaowei Ren
2014-07-21 5:38 ` [PATCH v7 01/10] x86, mpx: introduce VM_MPX to indicate that a VMA is MPX specific Qiaowei Ren
2014-07-21 5:38 ` [PATCH v7 02/10] x86, mpx: add MPX specific mmap interface Qiaowei Ren
2014-07-21 5:38 ` [PATCH v7 03/10] x86, mpx: add macro cpu_has_mpx Qiaowei Ren
2014-07-22 16:18 ` Dave Hansen
2014-07-23 2:35 ` Ren, Qiaowei
2014-07-23 16:02 ` Dave Hansen
2014-07-24 0:56 ` Ren, Qiaowei
2014-07-24 4:46 ` Dave Hansen
2014-07-24 5:23 ` Ren, Qiaowei
2014-07-21 5:38 ` [PATCH v7 04/10] x86, mpx: hook #BR exception handler to allocate bound tables Qiaowei Ren
2014-07-21 5:38 ` [PATCH v7 05/10] x86, mpx: extend siginfo structure to include bound violation information Qiaowei Ren
2014-07-22 0:42 ` Zhang, Tianfei
2014-07-21 5:38 ` [PATCH v7 06/10] mips: sync struct siginfo with general version Qiaowei Ren
2014-07-21 5:38 ` [PATCH v7 07/10] x86, mpx: decode MPX instruction to get bound violation information Qiaowei Ren
2014-07-21 6:07 ` Andi Kleen
2014-07-21 6:11 ` Ren, Qiaowei
2014-07-21 5:38 ` [PATCH v7 08/10] x86, mpx: add prctl commands PR_MPX_REGISTER, PR_MPX_UNREGISTER Qiaowei Ren
2014-07-21 6:09 ` Andi Kleen
2014-10-13 17:41 ` Dave Hansen
2014-10-14 1:44 ` Ren, Qiaowei
2014-07-23 16:20 ` Dave Hansen
2014-07-21 5:38 ` [PATCH v7 09/10] x86, mpx: cleanup unused bound tables Qiaowei Ren
2014-07-22 0:50 ` Zhang, Tianfei
2014-07-23 16:38 ` Dave Hansen [this message]
2014-07-24 0:49 ` Ren, Qiaowei
2014-07-24 1:04 ` Dave Hansen
2014-07-24 1:27 ` Ren, Qiaowei
2014-07-21 5:38 ` [PATCH v7 10/10] x86, mpx: add documentation on Intel MPX Qiaowei Ren
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