From: Peter Zijlstra <peterz@infradead.org>
To: Stephane Eranian <eranian@google.com>
Cc: Kees Cook <keescook@chromium.org>, Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
"mingo@elte.hu" <mingo@elte.hu>,
"ak@linux.intel.com" <ak@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
David Ahern <dsahern@gmail.com>, Jiri Olsa <jolsa@redhat.com>,
Hugh Dickins <hughd@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC] perf: mmap2 not covering VM_CLONE regions
Date: Tue, 8 Oct 2013 11:36:38 +0200 [thread overview]
Message-ID: <20131008093638.GO3081@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CABPqkBROM9jZfkU7suD-7=N=M38BCcVgdbgKoe-GE1RhY0puEg@mail.gmail.com>
On Tue, Oct 08, 2013 at 09:15:30AM +0200, Stephane Eranian wrote:
> Yes, it is but I am trying to see whether or not we could unify that and
> use a single u64 number to uniquely identify each mapping.
No you cannot; two unrelated executables which have distinct mm_ids can
easily mmap() the same shared file.
next prev parent reply other threads:[~2013-10-08 9:37 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-30 15:44 [RFC] perf: mmap2 not covering VM_CLONE regions Stephane Eranian
2013-09-30 16:15 ` Peter Zijlstra
2013-09-30 16:48 ` Stephane Eranian
2013-09-30 16:54 ` Peter Zijlstra
2013-10-01 11:22 ` Stephane Eranian
2013-10-02 11:23 ` Peter Zijlstra
2013-10-02 11:58 ` Peter Zijlstra
2013-10-02 12:39 ` Ingo Molnar
2013-10-02 12:46 ` Peter Zijlstra
2013-10-02 12:59 ` Stephane Eranian
2013-10-02 13:01 ` Peter Zijlstra
2013-10-02 13:13 ` Stephane Eranian
2013-10-02 13:37 ` Peter Zijlstra
2013-10-02 17:14 ` Kees Cook
2013-10-02 17:20 ` Stephane Eranian
2013-10-02 17:29 ` Kees Cook
2013-10-02 17:49 ` Stephane Eranian
2013-10-02 18:10 ` Kees Cook
2013-10-02 19:00 ` Peter Zijlstra
2013-10-02 19:38 ` Kees Cook
2013-10-02 20:31 ` Peter Zijlstra
2013-10-03 8:55 ` Stephane Eranian
2013-10-03 9:03 ` Peter Zijlstra
2013-10-03 9:13 ` Stephane Eranian
2013-10-03 15:34 ` Kees Cook
2013-10-07 21:04 ` Stephane Eranian
2013-10-08 6:54 ` Peter Zijlstra
2013-10-08 7:15 ` Stephane Eranian
2013-10-08 9:36 ` Peter Zijlstra [this message]
2013-10-08 9:42 ` Stephane Eranian
2013-10-08 9:54 ` Peter Zijlstra
2013-10-03 18:32 ` Andi Kleen
2013-10-07 11:16 ` Stephane Eranian
2013-10-07 11:32 ` Peter Zijlstra
2013-10-02 15:22 ` Ingo Molnar
2013-10-08 14:23 ` David Ahern
2013-10-08 19:41 ` Ingo Molnar
2013-10-08 19:54 ` Stephane Eranian
2013-10-08 19:57 ` David Ahern
2013-10-09 9:54 ` Ingo Molnar
2013-10-09 9:59 ` Ingo Molnar
2013-10-09 10:39 ` Peter Zijlstra
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