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

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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>
This commit is contained in:
KAMEZAWA Hiroyuki 2009-09-22 16:45:52 -07:00 committed by Linus Torvalds
parent 678ad5d8aa
commit 0d4c36a9b6
1 changed files with 5 additions and 0 deletions
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5
fs/proc/kcore.c
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@ -546,6 +546,11 @@ static int open_kcore(struct inode *inode, struct file *filp)
return -EPERM; return -EPERM;
if (kcore_need_update) if (kcore_need_update)
kcore_update_ram(); 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; return 0;
} }