diff options
| author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2009-09-23 03:45:52 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 18:39:42 +0400 |
| commit | 0d4c36a9b6ab6b15851f60956d901a3c53574ea8 (patch) | |
| tree | 08ca4041ee0a3748835b34227868427b7a82467f | |
| parent | 678ad5d8aaf8925cb8465f84e1e47d9b1284666a (diff) | |
| download | linux-0d4c36a9b6ab6b15851f60956d901a3c53574ea8.tar.xz | |
/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>
| -rw-r--r-- | fs/proc/kcore.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 3d0485c361c7..56013371f9f3 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -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; } |