Commit 0d4c36a9 authored Sep 22, 2009 by KAMEZAWA Hiroyuki Committed by Linus Torvalds Sep 23, 2009

/proc/kcore: update stat.st_size after memory hotplug



After memory hotplug (or other events in future), kcore size can be
modified.

To update inode->i_size, we have to know inode/dentry but we can't get it
from inside /proc directly.  But considerinyg memory hotplug, kcore image
is updated only when it's opened.  Then, updating inode->i_size at open()
is enough.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 678ad5d8

fs/proc/kcore.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -546,6 +546,11 @@ static int open_kcore(struct inode inode, struct file filp)
		return -EPERM;
		if (kcore_need_update)
		kcore_update_ram();
		if (i_size_read(inode) != proc_root_kcore->size) {
		mutex_lock(&inode->i_mutex);
		i_size_write(inode, proc_root_kcore->size);
		mutex_unlock(&inode->i_mutex);
		}
		return 0;
		}

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