From: Dave Hansen <dave@sr71.net>
To: Ingo Molnar <mingo@kernel.org>
Cc: Mel Gorman <mgorman@techsingularity.net>,
linux-kernel@vger.kernel.org, x86@kernel.org,
linux-api@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, dave.hansen@linux.intel.com,
arnd@arndb.de, hughd@google.com, viro@zeniv.linux.org.uk
Subject: Re: [PATCH 6/9] x86, pkeys: add pkey set/get syscalls
Date: Fri, 8 Jul 2016 12:26:13 -0700 [thread overview]
Message-ID: <577FFE55.7040209@sr71.net> (raw)
In-Reply-To: <20160708071810.GA27457@gmail.com>
On 07/08/2016 12:18 AM, Ingo Molnar wrote:
> So my hope was that we'd also grow some debugging features: such as a periodic
> watchdog timer clearing all non-allocated pkeys of a task and re-setting them to
> their (kernel-)known values and thus forcing user-space to coordinate key
> allocation/freeing.
I'm glad you mentioned this. I've explicitly called out this behavior
in the manpages now, or at least called out the fact that the kernel
will not preserve PKRU contents for unallocated keys.
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WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave@sr71.net>
To: Ingo Molnar <mingo@kernel.org>
Cc: Mel Gorman <mgorman@techsingularity.net>,
linux-kernel@vger.kernel.org, x86@kernel.org,
linux-api@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, dave.hansen@linux.intel.com,
arnd@arndb.de, hughd@google.com, viro@zeniv.linux.org.uk
Subject: Re: [PATCH 6/9] x86, pkeys: add pkey set/get syscalls
Date: Fri, 8 Jul 2016 12:26:13 -0700 [thread overview]
Message-ID: <577FFE55.7040209@sr71.net> (raw)
Message-ID: <20160708192613.icHLr6Lf8tHvKqgjDmFXvv7ZM_cuPLatzhA1yxW9H4I@z> (raw)
In-Reply-To: <20160708071810.GA27457@gmail.com>
On 07/08/2016 12:18 AM, Ingo Molnar wrote:
> So my hope was that we'd also grow some debugging features: such as a periodic
> watchdog timer clearing all non-allocated pkeys of a task and re-setting them to
> their (kernel-)known values and thus forcing user-space to coordinate key
> allocation/freeing.
I'm glad you mentioned this. I've explicitly called out this behavior
in the manpages now, or at least called out the fact that the kernel
will not preserve PKRU contents for unallocated keys.
next prev parent reply other threads:[~2016-07-08 19:26 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-07 12:47 [PATCH 0/9] [REVIEW-REQUEST] [v4] System Calls for Memory Protection Keys Dave Hansen
2016-07-07 12:47 ` Dave Hansen
2016-07-07 12:47 ` [PATCH 1/9] x86, pkeys: add fault handling for PF_PK page fault bit Dave Hansen
2016-07-07 12:47 ` Dave Hansen
2016-07-07 14:40 ` Mel Gorman
2016-07-07 14:40 ` Mel Gorman
2016-07-07 15:42 ` Dave Hansen
2016-07-07 15:42 ` Dave Hansen
2016-07-07 12:47 ` [PATCH 2/9] mm: implement new pkey_mprotect() system call Dave Hansen
2016-07-07 12:47 ` Dave Hansen
2016-07-07 14:40 ` Mel Gorman
2016-07-07 14:40 ` Mel Gorman
2016-07-07 16:51 ` Dave Hansen
2016-07-07 16:51 ` Dave Hansen
2016-07-08 10:15 ` Mel Gorman
2016-07-08 10:15 ` Mel Gorman
2016-07-07 12:47 ` [PATCH 3/9] x86, pkeys: make mprotect_key() mask off additional vm_flags Dave Hansen
2016-07-07 12:47 ` Dave Hansen
2016-07-07 12:47 ` [PATCH 4/9] x86: wire up mprotect_key() system call Dave Hansen
2016-07-07 12:47 ` [PATCH 5/9] x86, pkeys: allocation/free syscalls Dave Hansen
2016-07-07 12:47 ` Dave Hansen
2016-07-07 14:40 ` Mel Gorman
2016-07-07 14:40 ` Mel Gorman
2016-07-07 15:38 ` Dave Hansen
2016-07-07 15:38 ` Dave Hansen
2016-07-07 12:47 ` [PATCH 6/9] x86, pkeys: add pkey set/get syscalls Dave Hansen
2016-07-07 12:47 ` Dave Hansen
2016-07-07 14:45 ` Mel Gorman
2016-07-07 14:45 ` Mel Gorman
2016-07-07 17:33 ` Dave Hansen
2016-07-08 7:18 ` Ingo Molnar
2016-07-08 7:18 ` Ingo Molnar
[not found] ` <20160708071810.GA27457-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-07-08 16:32 ` Dave Hansen
2016-07-08 16:32 ` Dave Hansen
2016-07-09 8:37 ` Ingo Molnar
2016-07-09 8:37 ` Ingo Molnar
2016-07-11 4:25 ` Andy Lutomirski
2016-07-11 4:25 ` Andy Lutomirski
[not found] ` <CALCETrXJhVz6Za4=oidiM2Vfbb+XdggFBYiVyvOCcia+w064aQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-07-11 7:35 ` Ingo Molnar
2016-07-11 7:35 ` Ingo Molnar
2016-07-11 14:28 ` Dave Hansen
2016-07-12 7:13 ` Ingo Molnar
2016-07-12 7:13 ` Ingo Molnar
2016-07-12 15:39 ` Dave Hansen
2016-07-11 14:50 ` Andy Lutomirski
2016-07-11 14:50 ` Andy Lutomirski
2016-07-11 14:34 ` Dave Hansen
2016-07-11 14:34 ` Dave Hansen
2016-07-11 14:45 ` Andy Lutomirski
2016-07-11 15:48 ` Dave Hansen
2016-07-12 16:32 ` Andy Lutomirski
2016-07-12 17:12 ` Dave Hansen
2016-07-12 22:55 ` Andy Lutomirski
2016-07-12 22:55 ` Andy Lutomirski
2016-07-13 7:56 ` Ingo Molnar
2016-07-13 7:56 ` Ingo Molnar
2016-07-13 18:43 ` Andy Lutomirski
2016-07-13 18:43 ` Andy Lutomirski
2016-07-14 8:07 ` Ingo Molnar
2016-07-18 4:43 ` Andy Lutomirski
2016-07-18 9:56 ` Ingo Molnar
2016-07-18 9:56 ` Ingo Molnar
[not found] ` <20160709083715.GA29939-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-07-18 18:02 ` Dave Hansen
2016-07-18 18:02 ` Dave Hansen
2016-07-18 20:12 ` Dave Hansen
2016-07-18 20:12 ` Dave Hansen
2016-07-08 19:26 ` Dave Hansen [this message]
2016-07-08 19:26 ` Dave Hansen
[not found] ` <577E924C.6010406-gkUM19QKKo4@public.gmane.org>
2016-07-08 10:22 ` Mel Gorman
2016-07-08 10:22 ` Mel Gorman
2016-07-07 12:47 ` [PATCH 7/9] generic syscalls: wire up memory protection keys syscalls Dave Hansen
2016-07-07 12:47 ` Dave Hansen
2016-07-07 12:47 ` [PATCH 8/9] pkeys: add details of system call use to Documentation/ Dave Hansen
2016-07-07 12:47 ` Dave Hansen
2016-07-07 12:47 ` [PATCH 9/9] x86, pkeys: add self-tests Dave Hansen
2016-07-07 12:47 ` Dave Hansen
[not found] ` <20160707124719.3F04C882-LXbPSdftPKxrdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2016-07-07 14:47 ` [PATCH 0/9] [REVIEW-REQUEST] [v4] System Calls for Memory Protection Keys Mel Gorman
2016-07-07 14:47 ` Mel Gorman
2016-07-08 18:38 ` Hugh Dickins
2016-07-08 18:38 ` Hugh Dickins
-- strict thread matches above, loose matches on Subject: below --
2016-06-09 0:01 [PATCH 0/9] [v3] " Dave Hansen
2016-06-09 0:01 ` [PATCH 6/9] x86, pkeys: add pkey set/get syscalls Dave Hansen
2016-06-07 20:47 [PATCH 0/9] [v2] System Calls for Memory Protection Keys Dave Hansen
2016-06-07 20:47 ` [PATCH 6/9] x86, pkeys: add pkey set/get syscalls Dave Hansen
2016-06-07 20:47 ` Dave Hansen
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