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From: naveen yadav <yad.naveen@gmail.com>
To: kernelnewbies <Kernelnewbies@kernelnewbies.org>,
	linux-kernel@vger.kernel.org
Subject: shmem info issue
Date: Fri, 12 Jul 2013 17:08:32 +0530	[thread overview]
Message-ID: <CAJ8eaTw9o+ZBAzR+1qe-5XEpfZzv-6DJ_EHK_BF_32-va-KL+g@mail.gmail.com> (raw)

 Hi All

I am working on tmpfs. During code analysis I found shmem driver
register itself as tmpfs .

cat /proc/meminfo Shmem field read NR_SHMEM enum filed and shows used
memory in tmpfs


[root@localhost linux-3.8.2]# cat /proc/meminfo | grep -r Shmem
Shmem:               704 kB
[root@localhost linux-3.8.2]#

include/linux/mmzone.h
enum zone_stat_item {
-----cut here-------
 NR_SHMEM,               /* shmem pages (included tmpfs/GEM pages
 -----cut here
}

I have the following query
1-> cat /proc/meminfo | grep -r Shmem show only the used tmpfs memory
or it show used  tmpfs memory + mata data also (because I found Shmem
is bit larger then tempfs used memory )
2-> as per the developer comments NR_SHMEM included tmpfs and GEM
pages whct is Gem pages
3-> is my above code analysis is correct?

WARNING: multiple messages have this Message-ID (diff)
From: yad.naveen@gmail.com (naveen yadav)
To: kernelnewbies@lists.kernelnewbies.org
Subject: shmem info issue
Date: Fri, 12 Jul 2013 17:08:32 +0530	[thread overview]
Message-ID: <CAJ8eaTw9o+ZBAzR+1qe-5XEpfZzv-6DJ_EHK_BF_32-va-KL+g@mail.gmail.com> (raw)

 Hi All

I am working on tmpfs. During code analysis I found shmem driver
register itself as tmpfs .

cat /proc/meminfo Shmem field read NR_SHMEM enum filed and shows used
memory in tmpfs


[root at localhost linux-3.8.2]# cat /proc/meminfo | grep -r Shmem
Shmem:               704 kB
[root at localhost linux-3.8.2]#

include/linux/mmzone.h
enum zone_stat_item {
-----cut here-------
 NR_SHMEM,               /* shmem pages (included tmpfs/GEM pages
 -----cut here
}

I have the following query
1-> cat /proc/meminfo | grep -r Shmem show only the used tmpfs memory
or it show used  tmpfs memory + mata data also (because I found Shmem
is bit larger then tempfs used memory )
2-> as per the developer comments NR_SHMEM included tmpfs and GEM
pages whct is Gem pages
3-> is my above code analysis is correct?

             reply	other threads:[~2013-07-12 11:38 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-12 11:38 naveen yadav [this message]
2013-07-12 11:38 ` shmem info issue naveen yadav
2013-07-12 22:58 ` Hugh Dickins
2013-07-12 22:58   ` Hugh Dickins

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