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Artem Bityutskiy 8eab945c56 sunrpc: make the cache cleaner workqueue deferrable 
This patch makes the cache_cleaner workqueue deferrable, to prevent
unnecessary system wake-ups, which is very important for embedded
battery-powered devices.

do_cache_clean() is called every 30 seconds at the moment, and often
makes the system wake up from its power-save sleep state. With this
change, when the workqueue uses a deferrable timer, the
do_cache_clean() invocation will be delayed and combined with the
closest "real" wake-up. This improves the power consumption situation.

Note, I tried to create a DECLARE_DELAYED_WORK_DEFERRABLE() helper
macro, similar to DECLARE_DELAYED_WORK(), but failed because of the
way the timer wheel core stores the deferrable flag (it is the
LSBit in the time->base pointer). My attempt to define a static
variable with this bit set ended up with the "initializer element is
not constant" error.

Thus, I have to use run-time initialization, so I created a new
cache_initialize() function which is called once when sunrpc is
being initialized.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-07-06 12:27:48 -04:00
..
9p kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, SHRT_MAX and SHRT_MIN 2010-05-25 08:07:02 -07:00
802 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
8021q net: Remove unnecessary semicolons after switch statements 2010-05-17 17:44:35 -07:00
appletalk Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
atm net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
ax25 net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
bluetooth net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
bridge sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
caif caif: Bugfix - use MSG_TRUNC in receive 2010-05-23 23:57:43 -07:00
can net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-28 10:18:40 -07:00
dcb include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dccp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-25 16:59:51 -07:00
decnet net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
dsa Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
econet include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ethernet net: Inline skb_pull() in eth_type_trans(). 2010-05-02 02:21:44 -07:00
ieee802154 ieee802154: Fix possible NULL pointer dereference in wpan_phy_alloc 2010-05-23 23:11:07 -07:00
ipv4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-28 10:18:40 -07:00
ipv6 ipv6: Add GSO support on forwarding path 2010-05-28 01:57:17 -07:00
ipx include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
irda net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
iucv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-28 10:18:40 -07:00
key pfkey: add severity to printk 2010-05-17 23:23:13 -07:00
l2tp l2tp_eth: fix memory allocation 2010-04-23 16:37:33 -07:00
lapb include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
llc Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-12 00:05:35 -07:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-25 16:59:51 -07:00
netfilter xt_tee: use skb_dst_drop() 2010-05-28 03:41:17 -07:00
netlabel net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
netlink netlink: Implment netlink_broadcast_filtered 2010-05-21 09:37:32 -07:00
netrom net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
packet Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-21 01:14:25 -07:00
phonet Phonet: fix potential use-after-free in pep_sock_close() 2010-05-25 16:08:39 -07:00
rds net: Remove unnecessary semicolons after switch statements 2010-05-17 17:44:35 -07:00
rfkill Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
rose net: sk_sleep() helper 2010-04-20 16:37:13 -07:00
rxrpc net: sock_def_readable() and friends RCU conversion 2010-05-01 15:00:15 -07:00
sched cls_cgroup: Store classid in struct sock 2010-05-24 00:12:34 -07:00
sctp net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
sunrpc sunrpc: make the cache cleaner workqueue deferrable 2010-07-06 12:27:48 -04:00
tipc tipc: Reduce footprint by un-inlining tipc_msg_* routines 2010-05-12 23:02:29 -07:00
unix unix/garbage: kill copy of the skb queue walker 2010-05-03 15:39:58 -07:00
wanrouter headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
wimax Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-05-20 21:04:44 -07:00
wireless cfg80211: add missing braces 2010-05-21 14:40:01 -04:00
x25 X25: Remove bkl in sockopts 2010-05-17 17:39:28 -07:00
xfrm net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
compat.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Kconfig net/sysfs: Fix the bitrot in network device kobject namespace support 2010-05-21 09:37:32 -07:00
Makefile l2tp: Split pppol2tp patch into separate l2tp and ppp parts 2010-04-03 14:56:02 -07:00
nonet.c
socket.c cls_cgroup: Store classid in struct sock 2010-05-24 00:12:34 -07:00
sysctl_net.c net: Remove unnecessary returns from void function()s 2010-05-17 23:23:14 -07:00
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