linux-kernel - [PATCH] smaps should deal with huge zero page exactly same as normal zero page

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Message-ID: <CADUXgx7QTWBMxesxgCet5rjpGu-V-xK_-5f2rX9R+v-ggi902A@mail.gmail.com>
Date:	Thu, 9 Oct 2014 17:19:54 +0800
From:	Fengwei Yin <yfw.kernel@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Cc:	fengguang.wu@...el.com
Subject: [PATCH] smaps should deal with huge zero page exactly same as normal
 zero page

Hi,
Fengguang found that the RSS/PSS shown in smaps is not correct
if the file is /dev/zero.

Example:
7bea458b3000-7fea458b3000 r--p 00000000 00:13 39989
  /dev/zero
Size:           4294967296 kB
Rss:            10612736 kB
Pss:            10612736 kB
Shared_Clean:          0 kB
Shared_Dirty:          0 kB
Private_Clean:  10612736 kB
Private_Dirty:         0 kB
Referenced:     10612736 kB
Anonymous:             0 kB
AnonHugePages:  10612736 kB
Swap:                  0 kB
KernelPageSize:        4 kB
MMUPageSize:           4 kB
Locked:                0 kB
VmFlags: rd mr mw me

Download attachment "0001-smaps-should-deal-with-huge-zero-page-exactly-same.patch" of type "application/octet-stream" (2225 bytes)