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From: Ingo Molnar <mingo@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Pekka Enberg <penberg@kernel.org>,
	Colin Cross <ccross@android.com>,
	LKML <linux-kernel@vger.kernel.org>,
	Kyungmin Park <kmpark@infradead.org>,
	Christoph Hellwig <hch@infradead.org>,
	John Stultz <john.stultz@linaro.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Rob Landley <rob@landley.net>,
	Andrew Morton <akpm@linux-foundation.org>,
	Cyrill Gorcunov <gorcunov@openvz.org>,
	David Rientjes <rientjes@google.com>,
	Davidlohr Bueso <dave@gnu.org>, Kees Cook <keescook@chromium.org>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Hugh Dickins <hughd@google.com>, Mel Gorman <mgorman@suse.de>,
	Michel Lespinasse <walken@google.com>,
	Rik van Riel <riel@redhat.com>,
	Konstantin Khlebnikov <khlebnikov@openvz.org>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	David Howells <dhowells@redhat.com>,
	Arnd Bergmann <arnd@arndb.de>, Dave Jones <davej@redhat.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
	Oleg Nesterov <oleg@redhat.com>, Shaohua Li <shli@fusionio.com>,
	Sasha Levin <sasha.levin@oracle.com>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	"list@ebiederm.org:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	"list@ebiederm.org:MEMORY MANAGEMENT" <linux-mm@kvack.org>
Subject: Re: [PATCH 2/2] mm: add a field to store names for private anonymous memory
Date: Fri, 12 Jul 2013 11:28:51 +0200	[thread overview]
Message-ID: <20130712092851.GC5315@gmail.com> (raw)
In-Reply-To: <20130712091445.GQ25631@dyad.programming.kicks-ass.net>


* Peter Zijlstra <peterz@infradead.org> wrote:

> > Yeah, I could see that working. It doesn't solve the problems Ingo 
> > mentioned which are also important, though.
> 
> Nothing I've yet seen would do that. Its intrinsic to the fact that we 
> want 'anonymous' text tied to a process instance but require part of 
> that text (symbol information at the very least) to be available after 
> the process instance.
> 
> That are two contradictory requirements. You cannot preserve and not 
> preserve at the same time.
> 
> And pushing the symbol info into the kernel isn't going to fix that 
> either.

I fully agree with you in the JIT case.

I was arguing the utilty of the original, somewhat limited usecase: 
minimally naming allocator areas/heaps, on a high level.

Thanks,

	Ingo

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  reply	other threads:[~2013-07-12  9:28 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-12  2:34 [PATCH 1/2] mm: rearrange madvise code to allow for reuse Colin Cross
2013-07-12  2:34 ` [PATCH 2/2] mm: add a field to store names for private anonymous memory Colin Cross
2013-07-12  5:39   ` Pekka Enberg
2013-07-12  8:13     ` Peter Zijlstra
2013-07-12  8:17       ` Peter Zijlstra
2013-07-12  8:44         ` Ingo Molnar
2013-07-12  8:55           ` Pekka Enberg
2013-07-12  9:00           ` Peter Zijlstra
2013-07-12  9:15             ` Ingo Molnar
2013-07-12  9:27               ` Peter Zijlstra
2013-07-12  9:40                 ` Ingo Molnar
2013-07-12  9:49                   ` Peter Zijlstra
2013-07-12 10:01                     ` Ingo Molnar
2013-07-12 20:51                     ` Colin Cross
2013-09-26  1:24                       ` Colin Cross
2013-07-12  8:21       ` Pekka Enberg
2013-07-12  8:55         ` Peter Zijlstra
2013-07-12  9:04           ` Pekka Enberg
2013-07-12  9:14             ` Peter Zijlstra
2013-07-12  9:28               ` Ingo Molnar [this message]
2013-07-12  9:26             ` Ingo Molnar
2013-07-12  9:38               ` Pekka Enberg
2013-07-12  9:45                 ` Ingo Molnar
2013-07-12 10:09                   ` Peter Zijlstra
2013-07-12  5:43   ` Pekka Enberg
2013-07-12  6:18     ` Colin Cross
2013-07-12  7:03       ` Pekka Enberg
2013-07-12  6:36   ` Dave Hansen
2013-07-12  6:42     ` Colin Cross
2013-07-14 14:11   ` Oleg Nesterov
2013-07-14 19:27     ` Colin Cross
2013-07-14 14:17   ` Oleg Nesterov
2013-07-14 19:34     ` Colin Cross
  -- strict thread matches above, loose matches on Subject: below --
2013-10-15  1:31 [PATCHv3 1/2] mm: rearrange madvise code to allow for reuse Colin Cross
2013-10-15  1:31 ` [PATCH 2/2] mm: add a field to store names for private anonymous memory Colin Cross
2013-10-15  1:31   ` Colin Cross
2013-10-15 21:21   ` Andrew Morton
2013-10-15 21:32     ` Dave Hansen
2013-10-15 21:47   ` Colin Cross
2013-10-15 21:47     ` Colin Cross
2013-10-16  0:33   ` Minchan Kim
2013-10-16 20:00     ` Colin Cross
2013-10-16 20:34       ` Dave Hansen
2013-10-16 20:41         ` Colin Cross
2013-10-17  2:47       ` Minchan Kim
2013-10-30 21:15         ` Colin Cross
2013-11-01  1:30           ` Minchan Kim

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