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authorIan Kent <raven@themaw.net>2012-12-14 10:23:23 +0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-13 19:13:25 -0800
commitf55fb0c24386cee8b78f60d60186716bd0909493 (patch)
tree5ca3ab6c4c94c33f99934891c681c280778fb1c8 /fs/autofs4/expire.c
parent29594404d7fe73cd80eaa4ee8c43dcc53970c60e (diff)
downloadlinux-f55fb0c24386cee8b78f60d60186716bd0909493.tar.bz2
autofs4 - dont clear DCACHE_NEED_AUTOMOUNT on rootless mount
The DCACHE_NEED_AUTOMOUNT flag is cleared on mount and set on expire for autofs rootless multi-mount dentrys to prevent unnecessary calls to ->d_automount(). Since DCACHE_MANAGE_TRANSIT is always set on autofs dentrys ->d_managed() is always called so the check can be done in ->d_manage() without the need to change the flag. This still avoids unnecessary calls to ->d_automount(), adds negligible overhead and eliminates a seriously ugly check in the expire code. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/autofs4/expire.c')
-rw-r--r--fs/autofs4/expire.c9
1 files changed, 0 insertions, 9 deletions
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 842d00048a65..01443ce43ee7 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -548,15 +548,6 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
spin_lock(&sbi->fs_lock);
ino->flags &= ~AUTOFS_INF_EXPIRING;
- spin_lock(&dentry->d_lock);
- if (!ret) {
- if ((IS_ROOT(dentry) ||
- (autofs_type_indirect(sbi->type) &&
- IS_ROOT(dentry->d_parent))) &&
- !(dentry->d_flags & DCACHE_NEED_AUTOMOUNT))
- __managed_dentry_set_automount(dentry);
- }
- spin_unlock(&dentry->d_lock);
complete_all(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
dput(dentry);