Re: [PATCH 4/5] pagemap: Introduce the /proc/PID/pagemap2 file

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From: Pavel Emelyanov <xemul@parallels.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Linux MM <linux-mm@kvack.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/5] pagemap: Introduce the /proc/PID/pagemap2 file
Date: Fri, 12 Apr 2013 17:10:35 +0400	[thread overview]
Message-ID: <516807CB.6040208@parallels.com> (raw)
In-Reply-To: <20130411141944.dc17b3b1c78132eedec06aa6@linux-foundation.org>

On 04/12/2013 01:19 AM, Andrew Morton wrote:
> On Thu, 11 Apr 2013 15:29:41 +0400 Pavel Emelyanov <xemul@parallels.com> wrote:
> 
>> This file is the same as the pagemap one, but shows entries with bits
>> 55-60 being zero (reserved for future use). Next patch will occupy one
>> of them.
> 
> I'm not understanding the motivation for this.  What does the current
> /proc/pid/pagemap have in those bit positions?

A constant PAGE_SHIFT value.

> 
> .
> 

Thanks,
Pavel

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WARNING: multiple messages have this Message-ID (diff)

From: Pavel Emelyanov <xemul@parallels.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Linux MM <linux-mm@kvack.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/5] pagemap: Introduce the /proc/PID/pagemap2 file
Date: Fri, 12 Apr 2013 17:10:35 +0400	[thread overview]
Message-ID: <516807CB.6040208@parallels.com> (raw)
In-Reply-To: <20130411141944.dc17b3b1c78132eedec06aa6@linux-foundation.org>

On 04/12/2013 01:19 AM, Andrew Morton wrote:
> On Thu, 11 Apr 2013 15:29:41 +0400 Pavel Emelyanov <xemul@parallels.com> wrote:
> 
>> This file is the same as the pagemap one, but shows entries with bits
>> 55-60 being zero (reserved for future use). Next patch will occupy one
>> of them.
> 
> I'm not understanding the motivation for this.  What does the current
> /proc/pid/pagemap have in those bit positions?

A constant PAGE_SHIFT value.

> 
> .
> 

Thanks,
Pavel

next prev parent reply	other threads:[~2013-04-12 13:10 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-11 11:28 [PATCH 0/5] mm: Ability to monitor task memory changes (v3) Pavel Emelyanov
2013-04-11 11:28 ` Pavel Emelyanov
2013-04-11 11:28 ` [PATCH 1/5] clear_refs: Sanitize accepted commands declaration Pavel Emelyanov
2013-04-11 11:28   ` Pavel Emelyanov
2013-04-11 21:17   ` Andrew Morton
2013-04-11 21:17     ` Andrew Morton
2013-04-11 11:29 ` [PATCH 2/5] clear_refs: Introduce private struct for mm_walk Pavel Emelyanov
2013-04-11 11:29   ` Pavel Emelyanov
2013-04-11 11:29 ` [PATCH 3/5] pagemap: Introduce pagemap_entry_t without pmshift bits Pavel Emelyanov
2013-04-11 11:29   ` Pavel Emelyanov
2013-04-11 11:29 ` [PATCH 4/5] pagemap: Introduce the /proc/PID/pagemap2 file Pavel Emelyanov
2013-04-11 11:29   ` Pavel Emelyanov
2013-04-11 21:19   ` Andrew Morton
2013-04-11 21:19     ` Andrew Morton
2013-04-12 13:10     ` Pavel Emelyanov [this message]
2013-04-12 13:10       ` Pavel Emelyanov
2013-05-02 17:08   ` Matt Helsley
2013-05-02 17:08     ` Matt Helsley
2013-05-04  9:47     ` Pavel Emelyanov
2013-05-04  9:47       ` Pavel Emelyanov
2013-04-11 11:30 ` [PATCH 5/5] mm: Soft-dirty bits for user memory changes tracking Pavel Emelyanov
2013-04-11 11:30   ` Pavel Emelyanov
2013-04-11 21:24   ` Andrew Morton
2013-04-11 21:24     ` Andrew Morton
2013-04-12 13:14     ` Pavel Emelyanov
2013-04-12 13:14       ` Pavel Emelyanov
2013-04-15 21:46       ` Andrew Morton
2013-04-15 21:46         ` Andrew Morton
2013-04-15 23:57         ` Stephen Rothwell
2013-04-16 19:58         ` Pavel Emelyanov
2013-04-16 19:58           ` Pavel Emelyanov
2013-04-12 15:53   ` [PATCH 6/5] selftest: Add simple test for soft-dirty bit Pavel Emelyanov
2013-04-12 15:53     ` Pavel Emelyanov
2013-04-16 19:51 ` [PATCH 7/5] mem-soft-dirty: Reshuffle CONFIG_ options to be more Arch-friendly Pavel Emelyanov
2013-04-16 19:51   ` Pavel Emelyanov
2013-04-16 23:24   ` Stephen Rothwell

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