Paolo Valente 87f1369d6e pkt_sched: sch_qfq: improve efficiency of make_eligible ... In make_eligible, a mask is used to decide which groups must become eligible: the i-th group becomes eligible only if the i-th bit of the mask (from the right) is set. The mask is computed by left-shifting a 1 by a given number of places, and decrementing the result. The shift is performed on a ULL to avoid problems in case the number of places to shift is higher than 31. On a 32-bit machine, this is more costly than working on an UL. This patch replaces such a costly operation with two cheaper branches. The trick is based on the following fact: in case of a shift of at least 32 places, the resulting mask has at least the 32 less significant bits set, whereas the total number of groups is lower than 32. As a consequence, in this case it is enough to just set the 32 less significant bits of the mask with a cheaper ~0UL. In the other case, the shift can be safely performed on a UL. Reported-by: David S. Miller <davem@davemloft.net> Reported-by: David Laight <David.Laight@ACULAB.COM> Signed-off-by: Paolo Valente <paolo.valente@unimore.it> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-07-11 13:01:07 -07:00
..
9p	9p: fix off by one causing access violations and memory corruption	2013-07-11 11:36:02 -07:00
802	net/802/mrp: fix lockdep splat	2013-05-14 13:02:30 -07:00
8021q	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
appletalk	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
atm	net: always pass struct netdev_notifier_info to netdevice notifiers	2013-05-28 21:58:54 -07:00
ax25	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
batman-adv	net: Unmap fragment page once iterator is done	2013-06-24 01:46:01 -07:00
bluetooth	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
bridge	bridge: fix some kernel warning in multicast timer	2013-07-06 18:12:47 -07:00
caif	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
can	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
ceph	libceph: call r_unsafe_callback when unsafe reply is received	2013-07-03 15:32:58 -07:00
core	gso: Update tunnel segmentation to support Tx checksum offload	2013-07-11 12:18:49 -07:00
dcb	rtnetlink: Remove passing of attributes into rtnl_doit functions	2013-03-22 10:31:16 -04:00
dccp	tcp: Remove TCPCT	2013-03-17 14:35:13 -04:00
decnet	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
dns_resolver
dsa	dsa: fix freeing of sparse port allocation	2013-03-25 12:23:41 -04:00
ethernet	net: add ETH_P_802_3_MIN	2013-03-28 01:20:42 -04:00
ieee802154	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
ipv4	gso: Update tunnel segmentation to support Tx checksum offload	2013-07-11 12:18:49 -07:00
ipv6	ipv6: fix route selection if kernel is not compiled with CONFIG_IPV6_ROUTER_PREF	2013-07-11 11:51:10 -07:00
ipx	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
irda	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
iucv	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
key	af_key: fix info leaks in notify messages	2013-06-26 15:15:54 -07:00
l2tp	l2tp: make datapath resilient to packet loss when sequence numbers enabled	2013-07-02 16:33:25 -07:00
lapb
llc	llc: Fix missing msg_namelen update in llc_ui_recvmsg()	2013-04-07 16:28:01 -04:00
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
mac802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-04-30 03:55:20 -04:00
mpls	MPLS: Add limited GSO support	2013-05-27 22:50:59 -07:00
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-07-03 14:55:13 -07:00
netlabel	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
netlink	netlink: fix splat in skb_clone with large messages	2013-06-27 22:44:16 -07:00
netrom	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
nfc	NFC: llcp: Fix the well known services endianness	2013-06-14 13:45:10 +02:00
openvswitch	openvswitch: Add Kconfig dependency on GRE-DEMUX.	2013-07-01 13:19:43 -07:00
packet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-06-19 16:49:39 -07:00
phonet	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rds	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rfkill	Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next	2013-04-22 14:58:14 -04:00
rose	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rxrpc	Driver core patches for 3.9-rc1	2013-02-21 12:05:51 -08:00
sched	pkt_sched: sch_qfq: improve efficiency of make_eligible	2013-07-11 13:01:07 -07:00
sctp	net: sctp: confirm route during forward progress	2013-07-09 12:49:56 -07:00
sunrpc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
tipc	tipc: remove dev_base_lock use from enable_bearer	2013-06-17 15:53:01 -07:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
vmw_vsock	VSOCK: Fix VSOCK_HASH and VSOCK_CONN_HASH	2013-06-23 23:51:48 -07:00
wimax
wireless	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem	2013-06-28 13:18:21 -04:00
x25	x25: Fix broken locking in ioctl error paths.	2013-07-01 18:15:25 -07:00
xfrm	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next	2013-06-26 13:23:13 -07:00
compat.c	net: Unbreak compat_sys_{send,recv}msg	2013-06-06 11:52:14 -07:00
Kconfig	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
Makefile	MPLS: Add limited GSO support	2013-05-27 22:50:59 -07:00
nonet.c
socket.c	net: rename busy poll socket op and globals	2013-07-10 17:08:27 -07:00
sysctl_net.c