Commit Graph

157937 Commits

Author SHA1 Message Date
Andriy Gapon
09c22c66e1 acpi_cpu: do not apply P_LVLx_LAT rules to latencies returned by _CST
ACPI specification sates that if P_LVL2_LAT > 100, then a system doesn't
support C2; if P_LVL3_LAT > 1000, then C3 is not supported.
But there are no such rules for Cx state data returned by _CST.  If a
state is not supported it should not be included into the return
package.  In other words, any latency value returned by _CST is valid,
it's up to the OS and/or user to decide whether to use it.

Submitted by:	nork
Suggested by:	mav
MFC after:	1 week
2010-09-13 09:51:24 +00:00
David Xu
fa1efe5efd Update symbol. 2010-09-13 09:23:38 +00:00
Pawel Jakub Dawidek
a478ea7490 - Allow to specify value as const pointers.
- Make optional string values always an empty string.
2010-09-13 08:56:07 +00:00
Andriy Gapon
b7d28b2e0b bus_add_child: add specialized default implementation that calls panic
If a kobj method doesn't have any explicitly provided default
implementation, then it is auto-assigned kobj_error_method.
kobj_error_method is proper only for methods that return error code,
because it just returns ENXIO.
So, in the case of unimplemented bus_add_child caller would get
(device_t)ENXIO as a return value, which would cause the mistake to go
unnoticed, because return value is typically checked for NULL.
Thus, a specialized null_add_child is added.  It would have sufficied
for correctness to return NULL, but this type of mistake was deemed to
be rare and serious enough to call panic instead.

Watch out for this kind of problem with other kobj methods.

Suggested by:	jhb, imp
MFC after:	2 weeks
2010-09-13 08:34:20 +00:00
Warner Losh
80dfae5fe2 Simplify atomic selection 2010-09-13 07:29:02 +00:00
Warner Losh
c614f4e2db Prefer MACHINE_CPUARCH over MACHINE_ARCH 2010-09-13 07:27:03 +00:00
Alexander Motin
a157e42516 Refactor timer management code with priority to one-shot operation mode.
The main goal of this is to generate timer interrupts only when there is
some work to do. When CPU is busy interrupts are generating at full rate
of hz + stathz to fullfill scheduler and timekeeping requirements. But
when CPU is idle, only minimum set of interrupts (down to 8 interrupts per
second per CPU now), needed to handle scheduled callouts is executed.
This allows significantly increase idle CPU sleep time, increasing effect
of static power-saving technologies. Also it should reduce host CPU load
on virtualized systems, when guest system is idle.

There is set of tunables, also available as writable sysctls, allowing to
control wanted event timer subsystem behavior:
  kern.eventtimer.timer - allows to choose event timer hardware to use.
On x86 there is up to 4 different kinds of timers. Depending on whether
chosen timer is per-CPU, behavior of other options slightly differs.
  kern.eventtimer.periodic - allows to choose periodic and one-shot
operation mode. In periodic mode, current timer hardware taken as the only
source of time for time events. This mode is quite alike to previous kernel
behavior. One-shot mode instead uses currently selected time counter
hardware to schedule all needed events one by one and program timer to
generate interrupt exactly in specified time. Default value depends of
chosen timer capabilities, but one-shot mode is preferred, until other is
forced by user or hardware.
  kern.eventtimer.singlemul - in periodic mode specifies how much times
higher timer frequency should be, to not strictly alias hardclock() and
statclock() events. Default values are 2 and 4, but could be reduced to 1
if extra interrupts are unwanted.
  kern.eventtimer.idletick - makes each CPU to receive every timer interrupt
independently of whether they busy or not. By default this options is
disabled. If chosen timer is per-CPU and runs in periodic mode, this option
has no effect - all interrupts are generating.

As soon as this patch modifies cpu_idle() on some platforms, I have also
refactored one on x86. Now it makes use of MONITOR/MWAIT instrunctions
(if supported) under high sleep/wakeup rate, as fast alternative to other
methods. It allows SMP scheduler to wake up sleeping CPUs much faster
without using IPI, significantly increasing performance on some highly
task-switching loads.

Tested by:	many (on i386, amd64, sparc64 and powerc)
H/W donated by:	Gheorghe Ardelean
Sponsored by:	iXsystems, Inc.
2010-09-13 07:25:35 +00:00
Warner Losh
3c7f49dcf2 Prefer MACHINE_CPUARCH to MACHINE_ARCH unless there's a good reason... 2010-09-13 07:22:14 +00:00
David Xu
b749a04db3 PS_DEAD state needs not be checked because _thr_find_thread() has already
checked it.
2010-09-13 07:18:00 +00:00
Warner Losh
3a0d123e5f Use MACHINE_CPUARCH as appropriate
Define __KLD_SHARED to be yes or no depending on if the target uses shared
binaries for klds or not (this also eliminates 4 uses of MACHINE_ARCH).
2010-09-13 07:16:48 +00:00
Warner Losh
9117ce0c88 It turns out that TARGET_CPUARCH doesn't buy us much here, if anything, but
costs us another copy of the transform.  Revert it.

# Maybe makefile.inc1 should set TARGET_CPUARCH for the cross-tools, but
# it doesn't now.  That would solve problems in other places too.

Submitted by:	jmallet@
2010-09-13 07:15:01 +00:00
David Xu
a9b764e218 Convert thread list lock from mutex to rwlock. 2010-09-13 07:03:01 +00:00
Warner Losh
336c4b45ea Doh! two last second refactoring typos crept in. Fix. 2010-09-13 06:50:07 +00:00
Warner Losh
d2fb1699ac Revert r212513 and reimplement the search order to be ARCH, CPUARCH 2010-09-13 06:35:35 +00:00
Alexander Motin
373d257ef0 Add tunable 'hint.hpet.X.per_cpu' to specify how much per-CPU timers driver
should provide if there is sufficient hardware. Default is 1.
2010-09-13 06:32:56 +00:00
Jayachandran C.
a3e0e990de The functions in sys/mips/mips/psraccess.S can be implemented with
mips_rd_status/mips_wr_status.  Implement them in mips/include/cpufunc.h,
and remove psraccess.S.

Reviewed by:	neel, imp
2010-09-13 05:03:37 +00:00
Warner Losh
fca5b4f4d9 This is exactly the same as the .else, so remove it. 2010-09-13 04:23:23 +00:00
Warner Losh
4a9a1e43a5 Ooops! Shouldn't have committed this 2010-09-13 02:26:36 +00:00
Warner Losh
130ecf684f MF tbemd: Move to using Makefile.arch to select what to build.
Reviewed by:	arch@ (no objection)
2010-09-13 02:25:21 +00:00
Warner Losh
22e2f727d0 Merge from tbemd: Move to using Makefile.arch to control what's build.
Reviewed by:	(arch@, no objection)
2010-09-13 02:23:03 +00:00
Warner Losh
519b7ecc1b Merge from tbemd: use Makefile.arch to control building.
Reviewed by:	arch@ (many times, no objection)
2010-09-13 02:21:07 +00:00
Warner Losh
146fce53d8 MFtbemd: use MACHINE_CPUARCH 2010-09-13 02:05:42 +00:00
Warner Losh
5545f7f9b4 Use :T:Micc here like everywhere else we test icc 2010-09-13 02:02:20 +00:00
Warner Losh
165721e3b1 MFtbemd: Move to using MACHINE_CPUARCH, now that it is safe. 2010-09-13 01:44:56 +00:00
Warner Losh
c885004b9e Include FreeBSD svn tag 2010-09-13 01:44:07 +00:00
Warner Losh
10f3ae5899 Merge from tbemd, with a small amount of rework:
For all libthr contexts, use ${MACHINE_CPUARCH}
for all libc contexts, use ${MACHINE_ARCH} if it exists, otherwise use
${MACHINE_CPUARCH}
Move some common code up a layer (the .PATH statement was the same in
all the arch submakefiles).

# Hope she hasn't busted powerpc64 with this...
2010-09-13 01:43:10 +00:00
Warner Losh
9768ccae05 Merge from tbemd:
Add directory names directly and sort at the end.
Include bsd.arch.inc.mk so we can, in the future, more easily make arch
dependent changes in /bin (unlikely, but is needed for symmetry).
2010-09-13 01:29:51 +00:00
Warner Losh
9cbda5febf merge powerpc and powerpc64 now that we use TARGET_CPUARCH 2010-09-13 01:20:53 +00:00
Warner Losh
1136c95ff4 Move to using TARGET_CPUARCH instead of TARGET_ARCH. 2010-09-13 01:00:48 +00:00
Warner Losh
cb015705d8 Use TARGET_CPUARCH instead of TARGET_ARCH here. Define TARGET_CPUARCH
based on TARGET_ARCH.  Use TARGET_ARCH still for a powerpc64 test.
Futureproof for coming mipsel/mipseb and arm/armeb rename.
2010-09-13 00:57:48 +00:00
Jilles Tjoelker
2b11dfee8e sh: Add __dead2 to two functions that do not return.
Apart from helping static analyzers, this also appears to reduce the size of
the binary slightly.
2010-09-12 22:00:31 +00:00
Olivier Houchard
68710d7d2f In pmap_remove_all(), do not decrease pm_stats.wired_count if the mapping was
wired, as it's been done later in pmap_nuke_pv().

Submitted by:	Mark Tinguely
2010-09-12 20:46:32 +00:00
Konstantin Belousov
57bfe0a9f8 Do not fork nfsiod directly from the vop methods. This causes LORs between
vnode lock and several locks needed during fork, like fd lock.

Instead, schedule the task to be executed in the taskqueue context. We
still waiting for the fork to finish, but the context of the thread
executing the task does not make real LORs with our vnode lock.

Submitted by:	pluknet at gmail com
Reviewed by:	jhb
Tested by:	pho
MFC after:	3 weeks
2010-09-12 19:06:08 +00:00
Jaakko Heinonen
ab7d0151f9 In backup_kernel(), support backing up subdirectories and handle files
with spaces correctly.

Approved by:	cperciva
MFC after:	1 month
2010-09-12 18:53:44 +00:00
Qing Li
a458eaa039 Adding an address on an interface also requires the loopback route to
that address be installed.

PR:		kern/150481
Submitted by:	Ingo Flaschberger <if at xip.at>
MFC after:	5 days
2010-09-12 18:04:47 +00:00
Konstantin Belousov
12debc81fc Add DF_1_LOADFLTR.
MFC after:	3 days
2010-09-12 17:55:56 +00:00
Glen Barber
8d89b8f2a2 I believe the majority of Gregorian calendars would agree the current
year is 2010, not 2005.

Approved by:	keramida (mentor)
Pointy hat to:	gjb
MFC after:	1 week
2010-09-12 17:53:36 +00:00
Konstantin Belousov
702dafe6ab Fix typo.
MFC after:	3 days
2010-09-12 17:53:31 +00:00
Glen Barber
92d01db21c Rewording and typo fixes in newfs(8).
PR:		150490
Submitted by:	Eitan Adler <foreignuser at eitanadler com>
Additional fixes by:	Warren Block <wblock at wonkity com>, keramida
Approved by:	keramida (mentor)
MFC after:	1 week
2010-09-12 17:50:07 +00:00
Nathan Whitehorn
d48dde6f68 Check for undefined weak symbols during PLT binding on powerpc64, and do
not attempt to copy NULL function descriptors. This fixes LD_BIND_NOW on
powerpc64 after r211706.

Reviewed by:	kib
2010-09-12 17:04:51 +00:00
Ivan Voras
89f81c9646 List low-level Blowfish ECB module in the SRCS. It looks like it was dropped
by accident (and it would be inconvenient to implement it otherwise because it
uses internal non-published headers).

MFC after:	1 week
2010-09-12 16:28:26 +00:00
Rui Paulo
7879263397 Give a chance to the target binary to run the ctors by waiting until it
has reached main(). This allows plockstat to work.

Sponsored by:	The FreeBSD Foundation
2010-09-12 15:59:14 +00:00
Rui Paulo
47047e3418 Revamp locking a bit. This fixes three problems:
* processes now can't go away while we are inserting probes (fixes a panic)
* if a trap happens, we won't be holding the process lock (fixes a hang)
* fix a LOR between the process lock and the fasttrap bucket list lock

Thanks to kib for pointing some problems.
Sponsored by:	The FreeBSD Foundation
2010-09-12 14:12:16 +00:00
Glen Barber
f3f9858578 Bump date from r212440.
Approved by:	keramida (mentor)
MFC after:	1 week
2010-09-12 14:04:54 +00:00
Glen Barber
416d1e6f23 Bump dates in dbopen(3) and cpuset_getaffinity(2) from r212441 and
r212438, repectively.

Approved by:	keramida (mentor)
MFC after:	1 week
2010-09-12 14:04:05 +00:00
Alexander Motin
6184f8d60e Instead of storing last event timestamp, store the next event timestamp.
It corrects handling of the first event offset in emulated periodic mode.
2010-09-12 11:11:53 +00:00
Nathan Whitehorn
1a18ae7010 ATAPI DMA does not seem to work completely reliably on Shasta controllers,
especially in conjunction with ATA_CAM, so disable it for now.
2010-09-11 22:09:16 +00:00
Weongyo Jeong
37e81ca522 Mentions cases when bwi(4) driver should be used that it only wrote
about chipset type instead of card names because it's not easy to sort
names what cards use these chipsets.

Pointed by:	imp
2010-09-11 21:49:28 +00:00
Alexander Motin
90baf564d2 Do not print "frequency 0 Hz", when frequency is unknown. 2010-09-11 20:18:15 +00:00
Alexander Kabaev
eb262be333 Add missing pointer increment to sbuf_cat. 2010-09-11 19:42:50 +00:00