From: "Thomas Tuttle" <ttuttle@google.com>
To: mpm@selenic.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/4] pagemap: Return map count, not reference count, in /proc/kpagecount. (v2 of series)
Date: Thu, 5 Jun 2008 14:39:25 -0400 [thread overview]
Message-ID: <4ca0a85e0806051139q28d70661w569a036f54dcf89b@mail.gmail.com> (raw)
Since pagemap is all about examining pages mapped into processes' memory
spaces, it makes sense for kpagecount to return the map counts, not the
reference counts.
Signed-off-by: Thomas Tuttle
---
fs/proc/proc_misc.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 32dc14c..5a16090 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -726,7 +726,7 @@ static ssize_t kpagecount_read(struct file *file,
char __user *buf,
if (!ppage)
pcount = 0;
else
- pcount = atomic_read(&ppage->_count);
+ pcount = page_mapcount(ppage);
if (put_user(pcount, out++)) {
ret = -EFAULT;
--
1.5.3.6
reply other threads:[~2008-06-05 18:39 UTC|newest]
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