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1ecff35a6b
freebsd-skq/sys
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Alexander Motin 1ecff35a6b Use value -1 instead of 0 for marking unused APIC vectors. This fixes 
IRQ0 routing on LAPIC-enabled systems.

Add hint.apic.0.clock tunable. Setting it 0 disables using LAPIC timers
as hard-/stat-/profclock sources falling back to using i8254 and rtc timers.

On modern CPUs LAPIC is a part of CPU core which is shutting down when CPU
enters C3 or deeper power state. It makes no problems for interrupt
processing, as chipset wakes up CPU on interrupt triggering. But entering
C3 state kills LAPIC timer and freezes system time, making C3 and deeper
states practically unusable. Using i8254 timer allows to avoid this
problem.

By using i8254 timer my T7700 C2D CPU with UP kernel successfully enters
C3 state, saving more then a Watt of total idle power (>10%) in addition to
all other power-saving techniques.

This technique is not working for SMP yet, as only one CPU receives
timer interrupts. But I think that problem could be fixed by forwarding
interrupts to other CPUs with IPI.
2009-05-01 17:05:49 +00:00
..
amd64 Use value -1 instead of 0 for marking unused APIC vectors. This fixes 2009-05-01 17:05:49 +00:00
arm Reduce the number of bounce zones (and thus the number of bounce pages 2009-04-23 20:24:19 +00:00
boot A simple rewrite of biossmap.c: 2009-04-15 17:31:22 +00:00
bsm Merge OpenBSM 1.1 from OpenBSM vendor branch to head. 2009-04-19 16:17:13 +00:00
cam Get rid of the device index number stored in the sa(4) unit number. 2009-04-20 10:40:42 +00:00
cddl Introduce the extensible jail framework, using the same "name=value" 2009-04-29 21:14:15 +00:00
compat Reimplement futexes. 2009-05-01 15:36:02 +00:00
conf Bite the bullet, and make the IPv6 SSM and MLDv2 mega-commit: 2009-04-29 19:19:13 +00:00
contrib In preparation for turning on options VIMAGE in next commits, 2009-04-26 22:06:42 +00:00
crypto identify routine takes driver_t *, not device_t *. 2009-02-05 19:30:28 +00:00
ddb Prefer prototypes to k&r definitions. 2009-03-09 13:32:19 +00:00
dev Improve kernel dumping reliability for busy ATA channels: 2009-05-01 08:03:46 +00:00
fs Remove VOP_LEASE and supporting functions. This hasn't been used since 2009-04-10 10:52:19 +00:00
gdb
geom - Remove assertion of topology lock remaining from 7.x gvinum. It is not needed, 2009-04-18 16:36:27 +00:00
gnu Fix two issues with bufdaemon, often causing the processes to hang in 2009-03-16 15:39:46 +00:00
i386 Use value -1 instead of 0 for marking unused APIC vectors. This fixes 2009-05-01 17:05:49 +00:00
ia64 Remove isa_irq_pending(). It's not used. 2009-04-24 03:43:20 +00:00
isa Allow syscons to work on amd64 and i386 without any hints: 2009-03-05 19:10:17 +00:00
kern Don't call the OSD destructor if the data slot is NULL 2009-04-30 22:43:21 +00:00
kgssapi
legacy/dev Remove kue_fw.h, missed in previous IFF_NEEDSGIANT USB driver garbage 2009-04-17 09:48:20 +00:00
libkern Add memmove() to the kernel, making the kernel compile with Clang. 2009-02-28 16:21:25 +00:00
mips Don't conditionally define CACHE_LINE_SHIFT, as we anticipate sizing 2009-04-20 12:59:23 +00:00
modules Build sound modules on PowerPC. 2009-04-19 21:37:45 +00:00
net Use the flowid if its available for selecting the tx port. 2009-04-30 14:25:44 +00:00
net80211 Store the tx seq# of an 802.11 frame in the mbuf pkthdr; this will be 2009-04-27 17:39:41 +00:00
netatalk Lock interface address list lock around ifaddr inserts and deletes 2009-04-19 22:01:38 +00:00
netgraph In preparation to make options VIMAGE operational, where needed, 2009-04-26 07:14:50 +00:00
netinet Permit buiding kernels with options VIMAGE, restricted to only a single 2009-04-30 13:36:26 +00:00
netinet6 Limit scope of acquisition of INP_RLOCK for multicast input filter 2009-05-01 11:05:24 +00:00
netipsec Permit buiding kernels with options VIMAGE, restricted to only a single 2009-04-30 13:36:26 +00:00
netipx Make the SPX code use its own copies of insque()/remque(). 2009-04-26 21:03:27 +00:00
netnatm Remove IFF_NEEDSGIANT, a compatibility infrastructure introduced 2009-03-15 14:21:05 +00:00
netncp
netsmb
nfs Adding sys/nfs/nfssvc.h and sys/nfs/nfs_nfssvc.c in preparation for 2009-04-07 19:06:51 +00:00
nfs4client Remove VOP_LEASE and supporting functions. This hasn't been used since 2009-04-10 10:52:19 +00:00
nfsclient Remove trailing spaces 2009-04-13 19:54:33 +00:00
nfsserver Change nfsserver so that it uses the nfssvc() system call provided 2009-04-12 19:04:27 +00:00
nlm
opencrypto Fix return type for detach routine (should be int) 2009-02-05 17:43:12 +00:00
pc98 Migrate the olpt(4) driver to si_drv1 instead of using dev2unit(). 2009-04-15 19:58:41 +00:00
pci For RTL8139C+ controllers, have controller handle padding short 2009-04-20 07:13:04 +00:00
powerpc Zero PCB during early AIM PowerPC init. 2009-04-24 08:57:54 +00:00
rpc Added a field to the SVCXPRT structure that the nfsv4 server can 2009-04-16 16:26:35 +00:00
security Temporarily relax the constraints on argument size checking for A_GETCOND; 2009-04-19 23:28:08 +00:00
sparc64 Don't conditionally define CACHE_LINE_SHIFT, as we anticipate sizing 2009-04-20 12:59:23 +00:00
sun4v Don't conditionally define CACHE_LINE_SHIFT, as we anticipate sizing 2009-04-20 12:59:23 +00:00
sys Permit buiding kernels with options VIMAGE, restricted to only a single 2009-04-30 13:36:26 +00:00
tools Add SDT DTrace probes for VFS vnode operations in the vfs:vop 2009-03-29 03:30:15 +00:00
ufs Change the semantics of i_modrev/va_filerev to what is required for 2009-04-27 16:46:16 +00:00
vm Use the acquired reference to the vmspace instead of direct dereferencing 2009-04-28 11:45:36 +00:00
xdr Add memmove() to the kernel, making the kernel compile with Clang. 2009-02-28 16:21:25 +00:00
xen Fix the Xen build for i386 PV mode. 2009-04-01 17:06:28 +00:00
Makefile Removal pccard directory requires removing it from the list of things 2009-02-15 18:19:24 +00:00