linux/security
Tim Chen 423e0ab086 VFS : mount lock scalability for internal mounts
For a number of file systems that don't have a mount point (e.g. sockfs
and pipefs), they are not marked as long term. Therefore in
mntput_no_expire, all locks in vfs_mount lock are taken instead of just
local cpu's lock to aggregate reference counts when we release
reference to file objects.  In fact, only local lock need to have been
taken to update ref counts as these file systems are in no danger of
going away until we are ready to unregister them.

The attached patch marks file systems using kern_mount without
mount point as long term.  The contentions of vfs_mount lock
is now eliminated.  Before un-registering such file system,
kern_unmount should be called to remove the long term flag and
make the mount point ready to be freed.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-24 10:08:32 -04:00
..
apparmor Merge branch 'ptrace' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc 2011-07-22 15:06:50 -07:00
integrity/ima ima: remove unnecessary call to ima_must_measure 2011-02-23 16:38:52 -05:00
keys KEYS: Fix error handling in construct_key_and_link() 2011-06-21 18:31:45 -07:00
selinux VFS : mount lock scalability for internal mounts 2011-07-24 10:08:32 -04:00
smack ->permission() sanitizing: don't pass flags to ->inode_permission() 2011-07-20 01:43:26 -04:00
tomoyo get rid of pointless checks for dentry->sb == NULL 2011-07-20 01:44:19 -04:00
capability.c ->permission() sanitizing: don't pass flags to ->inode_permission() 2011-07-20 01:43:26 -04:00
commoncap.c capabilities: do not special case exec of init 2011-04-04 10:31:06 +10:00
device_cgroup.c security,rcu: Convert call_rcu(whitelist_item_free) to kfree_rcu() 2011-07-20 11:05:30 -07:00
inode.c convert get_sb_single() users 2010-10-29 04:16:28 -04:00
Kconfig security: select correct default LSM_MMAP_MIN_ADDR on ARM. 2011-03-22 09:35:12 +11:00
lsm_audit.c LSM: separate LSM_AUDIT_DATA_DENTRY from LSM_AUDIT_DATA_PATH 2011-04-25 18:14:07 -04:00
Makefile AppArmor: Enable configuring and building of the AppArmor security module 2010-08-02 15:38:34 +10:00
min_addr.c mmap_min_addr check CAP_SYS_RAWIO only for write 2010-04-23 08:56:31 +10:00
security.c ->permission() sanitizing: don't pass flags to exec_permission() 2011-07-20 01:43:29 -04:00