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From: Dave Hansen <dave.hansen@intel.com>
To: Colin Cross <ccross@android.com>
Cc: 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>,
	Pekka Enberg <penberg@kernel.org>, 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>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	"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>,
	Ingo Molnar <mingo@kernel.org>,
	linux-doc@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 2/2] mm: add a field to store names for private anonymous memory
Date: Thu, 11 Jul 2013 23:36:45 -0700	[thread overview]
Message-ID: <51DFA3FD.2020201@intel.com> (raw)
In-Reply-To: <1373596462-27115-2-git-send-email-ccross@android.com>

On 07/11/2013 07:34 PM, Colin Cross wrote:
> +		pages_pinned = get_user_pages(current, mm, page_start_vaddr,
> +				1, 0, 0, &page, NULL);
> +		if (pages_pinned < 1) {
> +			seq_puts(m, "<fault>]");
> +			return;
> +		}
> +
> +		kaddr = (const char *)kmap(page);
> +		len = min(max_len, PAGE_SIZE - page_offset);
> +		write_len = strnlen(kaddr + page_offset, len);
> +		seq_write(m, kaddr + page_offset, write_len);
> +		kunmap(page);
> +		put_page(page);

This looks a bit like access_process_vm()?  Can you perhaps use it here?

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  parent reply	other threads:[~2013-07-12  6:37 UTC|newest]

Thread overview: 44+ 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
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 [this message]
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 21:21   ` Andrew Morton
2013-10-15 21:32     ` Dave Hansen
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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