From: Rik van Riel <riel@redhat.com>
To: Pavel Emelyanov <xemul@parallels.com>
Cc: Linux MM <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>
Subject: Re: [PATCH] proc: Report PageAnon in last left bit of /proc/pid/pagemap
Date: Fri, 20 Apr 2012 16:32:39 -0400 [thread overview]
Message-ID: <4F91C7E7.8060300@redhat.com> (raw)
In-Reply-To: <4F91BC8A.9020503@parallels.com>
On 04/20/2012 03:44 PM, Pavel Emelyanov wrote:
> Andrew noticed, that the proc pagemap file solved 2 of 3 above issues -- it
> reports whether a page is present or swapped and it doesn't report not
> mapped page cache pages. But, it doesn't distinguish cow-ed file pages from
> not cow-ed.
>
> I would like to make the last unused bit in this file to report whether the
> page mapped into respective pte is PageAnon or not.
>
> Signed-off-by: Pavel Emelyanov<xemul@openvz.org>
Looks reasonable to me. I see you also report "special" pages
as file pages, but since those cannot be migrated anyway that
should be ok.
Acked-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2012-04-20 20:32 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-20 19:44 [PATCH] proc: Report PageAnon in last left bit of /proc/pid/pagemap Pavel Emelyanov
2012-04-20 20:32 ` Rik van Riel [this message]
2012-04-20 20:36 ` Pavel Emelyanov
2012-04-27 12:39 ` [PATCH 1/2] proc: report file/anon bit in /proc/pid/pagemap Konstantin Khlebnikov
2012-04-27 13:37 ` Pavel Emelyanov
2012-04-27 23:40 ` Andrew Morton
2012-04-28 13:32 ` KOSAKI Motohiro
2012-04-29 8:28 ` Konstantin Khlebnikov
2012-04-27 12:39 ` [PATCH 2/2] proc: report page->index instead of pfn for non-linear mappings " Konstantin Khlebnikov
2012-04-27 13:37 ` Pavel Emelyanov
2012-04-30 10:48 ` [PATCH v3] proc: report file/anon bit " Konstantin Khlebnikov
2012-04-30 20:32 ` KOSAKI Motohiro
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