Waiman Long a767f680e3 SELinux: Increase ebitmap_node size for 64-bit configuration ... Currently, the ebitmap_node structure has a fixed size of 32 bytes. On a 32-bit system, the overhead is 8 bytes, leaving 24 bytes for being used as bitmaps. The overhead ratio is 1/4. On a 64-bit system, the overhead is 16 bytes. Therefore, only 16 bytes are left for bitmap purpose and the overhead ratio is 1/2. With a 3.8.2 kernel, a boot-up operation will cause the ebitmap_get_bit() function to be called about 9 million times. The average number of ebitmap_node traversal is about 3.7. This patch increases the size of the ebitmap_node structure to 64 bytes for 64-bit system to keep the overhead ratio at 1/4. This may also improve performance a little bit by making node to node traversal less frequent (< 2) as more bits are available in each node. Signed-off-by: Waiman Long <Waiman.Long@hp.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Paul Moore <pmoore@redhat.com> Signed-off-by: Eric Paris <eparis@redhat.com>		2013-07-25 13:02:31 -04:00
..
avtab.c
avtab.h
conditional.c
conditional.h
constraint.h
context.h
ebitmap.c	SELinux: Reduce overhead of mls_level_isvalid() function call	2013-07-25 13:02:18 -04:00
ebitmap.h	SELinux: Increase ebitmap_node size for 64-bit configuration	2013-07-25 13:02:31 -04:00
hashtab.c
hashtab.h
mls_types.h	SELinux: Reduce overhead of mls_level_isvalid() function call	2013-07-25 13:02:18 -04:00
mls.c	SELinux: Reduce overhead of mls_level_isvalid() function call	2013-07-25 13:02:18 -04:00
mls.h
policydb.c
policydb.h
services.c	userns: Convert selinux to use kuid and kgid where appropriate	2012-09-21 03:13:22 -07:00
services.h
sidtab.c
sidtab.h
status.c
symtab.c
symtab.h