From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx198.postini.com [74.125.245.198]) by kanga.kvack.org (Postfix) with SMTP id A24166B0044 for ; Sun, 29 Apr 2012 04:28:43 -0400 (EDT) Received: by lagz14 with SMTP id z14so1893050lag.14 for ; Sun, 29 Apr 2012 01:28:41 -0700 (PDT) Message-ID: <4F9CFBB4.2080708@openvz.org> Date: Sun, 29 Apr 2012 12:28:36 +0400 From: Konstantin Khlebnikov MIME-Version: 1.0 Subject: Re: [PATCH 1/2] proc: report file/anon bit in /proc/pid/pagemap References: <4F91BC8A.9020503@parallels.com> <20120427123901.2132.47969.stgit@zurg> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: KOSAKI Motohiro Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton , Hugh Dickins , Rik van Riel , Pavel Emelianov KOSAKI Motohiro wrote: >> diff --git a/Documentation/vm/pagemap.txt b/Documentation/vm/pagemap.txt >> index 4600cbe..7587493 100644 >> --- a/Documentation/vm/pagemap.txt >> +++ b/Documentation/vm/pagemap.txt >> @@ -16,7 +16,7 @@ There are three components to pagemap: >> * Bits 0-4 swap type if swapped >> * Bits 5-54 swap offset if swapped >> * Bits 55-60 page shift (page size = 1<> - * Bit 61 reserved for future use >> + * Bit 61 page is file-page or shared-anon >> * Bit 62 page swapped >> * Bit 63 page present > > hmm.. > Here says, file or shmem. > > >> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c >> index 2d60492..bc3df31 100644 >> --- a/fs/proc/task_mmu.c >> +++ b/fs/proc/task_mmu.c >> @@ -700,6 +700,7 @@ struct pagemapread { >> >> #define PM_PRESENT PM_STATUS(4LL) >> #define PM_SWAP PM_STATUS(2LL) >> +#define PM_FILE PM_STATUS(1LL) >> #define PM_NOT_PRESENT PM_PSHIFT(PAGE_SHIFT) >> #define PM_END_OF_BUFFER 1 > > But, this macro says it's file. it seems a bit misleading. ;-) well... you know, shmem/shared-anon actually lays on tmpfs. so they really file-pages. > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ > Don't email: email@kvack.org -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org