Tom Rhodes [Fri, 12 Mar 2004 21:36:12 +0000 (21:36 +0000)]
This are the build infrastructure changes to allow to use the
Intel C/C++ compiler (lang/icc) to build the kernel.
The icc CPUTYPE CFLAGS use icc v7 syntax, icc v8 moans about them, but
doesn't abort. They also produce CPU specific code (new instructions
of the CPU, not only CPU specific scheduling), so if you get coredumps
with signal 4 (SIGILL, illegal instruction) you've used the wrong
CPUTYPE.
Incarnations of this patch survive gcc compiles and my make universe.
I use it on my desktop.
To use it update share/mk, add
/usr/local/intel/compiler70/ia32/bin (icc v7, works)
or
/usr/local/intel_cc_80/bin (icc v8, doesn't work)
to your PATH, make sure you have a new kernel compile directory
(e.g. MYKERNEL_icc) and run
CFLAGS="-O2 -ip" CC=icc make depend
CFLAGS="-O2 -ip" CC=icc make
in it.
Don't compile with -ipo, the build infrastructure uses ld directly to
link the kernel and the modules, but -ipo needs the link step to be
performed with Intel's linker.
Problems with icc v8:
- panic: npx0 cannot be emulated on an SMP system
- UP: first start of /bin/sh results in a FP exception
Parts of this commit contains suggestions or submissions from
Marius Strobl <marius@alchemy.franken.de>.
Reviewed by: silence on -arch
Submitted by: netchild
Brooks Davis [Fri, 12 Mar 2004 20:37:40 +0000 (20:37 +0000)]
Allow kernel with the BOOTP option to boot when DHCP/BOOTP sets the root
path to an absolute path without a host name. Previously, there was a
nasty POLA violation where a system would PXE boot until you added the
BOOTP option and then it would panic instead.
Reviewed by: tegge, Dirk-Willem van Gulik <dirkx at webweaving.org>
(a previous version)
Submitted by: tegge (getip function)
Ken Smith [Fri, 12 Mar 2004 20:35:21 +0000 (20:35 +0000)]
This is a temporary fix to solve a regression issue on sparc64 that
is caused by the way sparc64 registers its CPUs. Nate will work on
a real fix shortly.
Bill Paul [Fri, 12 Mar 2004 17:31:29 +0000 (17:31 +0000)]
Add if_ndis_pci.c and if_ndis_pccard.c so that building the NDISulator
directly into the kernel works again. Also make the 'ndisapi' entries
not depend on pccard anymore.
Maxime Henrion [Fri, 12 Mar 2004 17:05:06 +0000 (17:05 +0000)]
Don't set ifp->if_output to ether_output(), since ether_ifattach()
will do it for us (we either call ether_ifattach() directly, or it
gets called within ieee80211_ifattach()).
Replace a manual check of a VMIO candidate with vn_canvmio(). This
silences an annoying warning in getblk() when VMIO'ing on a directory
vnode, which can happen when vfs.vmiodirenable is 1.
Bring the warning message in line with reality at the same time.
Bruce Evans [Fri, 12 Mar 2004 12:02:03 +0000 (12:02 +0000)]
Initial support for C99's (or is it POSIX.1-2001's?) MATH_ERRNO,
MATH_ERREXCEPTION and math_errhandling, so that C99 applications at
least have the possibility of determining that errno is not set for
math functions. Set math_errhandling to the non-standard-conforming
value of 0 for now to indicate that we don't support either method
of reporting errors. We intentionally don't support MATH_ERRNO
because errno is a mistake, and we are missing support for
MATH_ERREXCEPTION (<fenv.h>, compiler support for <fenv.h>, and
actually setting the exception flags correctly).
Brooks Davis [Fri, 12 Mar 2004 04:40:16 +0000 (04:40 +0000)]
If /conf/diskless_remount exists, use it to remount the entire /conf
directory. This allows multiple roots (say for different architectures)
to share the same set of /conf files.
Tim Kientzle [Thu, 11 Mar 2004 20:00:10 +0000 (20:00 +0000)]
Don't run fsck if there's no /etc/fstab.
In particular, this allows a "virgin" system installed from
source (installworld, installkernel, cd etc && make distribution)
to boot correctly and modestly simplifies the creation
of single-partition network/cdrom/CF bootable images.
When I was a kid my work table was one cluttered mess an cleaning it up
were a rather overwhelming task. I soon learned that if you don't know
where you're going to store something, at least try to pile it next to
something slightly related in the hope that a pattern emerges.
Apply the same principle to the ffs/snapshot/softupdates code which have
leaked into specfs: Add yet a buf-quasi-method and call it from the
only two places I can see it can make a difference and implement the
magic in ffs_softdep.c where it belongs.
It's not pretty, but at least it's one less layer violated.
- Use variable names instead of numbers for the script arguments to
improve readability.
- Use mktemp to create the temporary files and directory.
- Mount temporary md(4) backed file system on a temporary directory,
instead of /mnt.
Bruce Evans [Thu, 11 Mar 2004 13:38:54 +0000 (13:38 +0000)]
Don't implement anything in the ffs family in <machine/cpufunc.h>
in the non-_KERNEL case. This "fixes" applications that include
this "kernel-only" header and also include <strings.h> (or get
<strings.h> via the default _BSD_VISIBLE pollution in <string.h>.
In C++ there was a fatal error: the declaration specifies C linkage
but the implementation gives C++ linkage. In C there was only a
static/extern mismatch if the headers were included in a certain order
order, and a partially redundant declaration for all include orders;
gcc emits incomplete or wrong diagnostics for these, but only for
compiling with -Wsystem-headers and certain other warning options, so
the problem was usually not seen for C.
Bruce Evans [Thu, 11 Mar 2004 11:30:57 +0000 (11:30 +0000)]
Fixed a misspelling of 0 as NULL.
Fixed a nearby bug. The "play it safe" code in dosysctl() was unsafe
because it overran the buffer by 1 if sysctl() filled all of the buffer.
Fixed a nearby style bug in output. Not just 1, but 2 extra newlines
were printed at the end by "vmstat -m" and "vmstat -z". Don't print
any newlines explicitly. This depends on 2 of the many formatting
bugs in the corresponding sysctls. First, the sysctls return an extra
newline at the end of the strings. This also messes up output from
sysctl(8). Second, the sysctls return an extra newline at the beginning
of the strings. This is good for separating the 2 tables output by
"vmstat -mz" and for starting the header on a new line in plain sysctl
output, but gives a bogus extra newline at the beginning for "vm -[m | z]"
and "sysctl -n [kern.malloc | vm.zone]".
Fixed some nearby style bugs in the source code:
- the same line that misspelled 0 as NULL also spelled NULL as 0.
- the size was doubled twice in the realloc loop.
- the "play it safe" comment was misleading. Terminating the buffer
is bogus because dosysctl() is only meant to work with sysctls that
return strings and the terminator is part of a string. However, the
kern.malloc sysctl has more than style bugs. It also doesn't return
a string. Termination is needed to work around this bug.
Bill Paul [Thu, 11 Mar 2004 09:40:00 +0000 (09:40 +0000)]
Fix the problem with the Cisco Aironet 340 PCMCIA card. Most newer drivers
for Windows are deserialized miniports. Such drivers maintain their own
queues and do their own locking. This particular driver is not deserialized
though, and we need special support to handle it correctly.
Typically, in the ndis_rxeof() handler, we pass all incoming packets
directly to (*ifp->if_input)(). This in turn may cause another thread
to run and preempt us, and the packet may actually be processed and
then released before we even exit the ndis_rxeof() routine. The
problem with this is that releasing a packet calls the ndis_return_packet()
function, which hands the packet and its buffers back to the driver.
Calling ndis_return_packet() before ndis_rxeof() returns will screw
up the driver's internal queues since, not being deserialized,
it does no locking.
To avoid this problem, if we detect a serialized driver (by checking
the attribute flags passed to NdisSetAttributesEx(), we use an alternate
ndis_rxeof() handler, ndis_rxeof_serial(), which puts the call to
(*ifp->if_input)() on the NDIS SWI work queue. This guarantees the
packet won't be processed until after ndis_rxeof_serial() returns.
Note that another approach is to always copy the packet data into
another mbuf and just let the driver retain ownership of the ndis_packet
structure (ndis_return_packet() never needs to be called in this
case). I'm not sure which method is faster.
Tom Rhodes [Thu, 11 Mar 2004 04:35:08 +0000 (04:35 +0000)]
Add a newsyslog.conf manual page. This follows suit with the other utilities
which have configuration files. This is just a cut-paste from newsyslog.8
with the following changes:
o Kill hard sentence breaks.
o Markup fixes.
o Wordsmithing.
Marcel Moolenaar [Wed, 10 Mar 2004 22:23:20 +0000 (22:23 +0000)]
Identify the Deerfield processor. Deerfield is a low-voltage variant
based on the Madison core and targeting the low end of the spectrum.
Its clock frequency is 1Ghz, whereas Madison starts at 1.3Ghz. Since
the CPUID information is the same for Madison and Deerfield, we use
the clock frequency to identify the processor.
Supposedly the Deerfield only uses 62W, which seems to be less than
modern Xeon processors (about 70W) and about half what a Madison would
need.
Ruslan Ermilov [Wed, 10 Mar 2004 21:51:06 +0000 (21:51 +0000)]
Reworked the fix to print the useful line number on error in
the .for loop:
- Replaced four global variables in parse.c with one.
- Made Parse_FromString() accept the "lineno" as an argument.
- Fixed line numbering when there are escaped newlines in the
body of the .for loop.
Fix a long-standing deadlock issue with vnode backed md(4) devices:
On vnode backed md(4) devices over a certain, currently undetermined
size relative to the buffer cache our "lemming-syncer" can provoke
a buffer starvation which puts the md thread to sleep on wdrain.
This generally tends to grind the entire system to a stop because the
event that is supposed to wake up the thread will not happen until a fair
bit of the piled up I/O requests in the system finish, and since a lot
of those are on a md(4) vnode backed device which is currently waiting
on wdrain until a fair amount of the piled up ... you get the picture.
The cure is to issue all VOP_WRITES on the vnode backing the device
with IO_SYNC.
In addition to more closely emulating a real disk device with a
non-lying write-cache, this makes the writes exempt from rate-limited
(there to avoid starving the buffer cache) and consequently prevents
the deadlock.
Unfortunately performance takes a hit.
Add "async" option to give people who know what they are doing the
old behaviour.
Change time_t from a 32-bit value to a 64-bit value, on FreeBSD/sparc64
only. This is a MAJOR incompatible change for the sparc64 platform,
but will not effect FreeBSD on other architectures.
Reviewed by: imp for UPDATING, freebsd-sparc for the change itself.
Tim J. Robbins [Wed, 10 Mar 2004 12:41:11 +0000 (12:41 +0000)]
Set stream orientation in ungetc() instead of __ungetc(). This avoids
setting it redundantly when called from ungetwc(), vfscanf() etc.,
which already set the orientation.
Bill Paul [Wed, 10 Mar 2004 07:43:11 +0000 (07:43 +0000)]
Fix several issues related to the KeInitializeTimer() etc... API stuff
that I added recently:
- When a periodic timer fires, it's automatically re-armed. We must
make sure to re-arm the timer _before_ invoking any caller-supplied
defered procedure call: the DPC may choose to call KeCancelTimer(),
and re-arming the timer after the DPC un-does the effect of the
cancel.
- Fix similar issue with periodic timers in subr_ndis.c.
- When calling KeSetTimer() or KeSetTimerEx(), if the timer is
already pending, untimeout() it first before timeout()ing
it again.
- The old Atheros driver for the 5211 seems to use KeSetTimerEx()
incorrectly, or at the very least in a very strange way that
doesn't quite follow the Microsoft documentation. In one case,
it calls KeSetTimerEx() with a duetime of 0 and a period of 5000.
The Microsoft documentation says that negative duetime values
are relative to the current time and positive values are absolute.
But it doesn't say what's supposed to happen with positive values
that less than the current time, i.e. absolute values that are
in the past.
Lacking any further information, I have decided that timers with
positive duetimes that are in the past should fire right away (or
in our case, after only 1 tick). This also takes care of the other
strange usage in the Atheros driver, where the duetime is
specified as 500000 and the period is 50. I think someone may
have meant to use -500000 and misinterpreted the documentation.
- Also modified KeWaitForSingleObject() and KeWaitForMultipleObjects()
to make the same duetime adjustment, since they have the same rules
regarding timeout values.
- Cosmetic: change name of 'timeout' variable in KeWaitForSingleObject()
and KeWaitForMultipleObjects() to 'duetime' to avoid senseless
(though harmless) overlap with timeout() function name.
With these fixes, I can get the 5211 card to associate properly with
my adhoc net using driver AR5211.SYS version 2.4.1.6.
Robert Watson [Wed, 10 Mar 2004 04:56:54 +0000 (04:56 +0000)]
Move the AH algorithm list from a static local function variable to
a static const global variable in ah_core.c. This makes it more clear
that this array does not require synchronization, as well as
synchronizing the layout to the ESP algorithm list. This is the
version of my patch that Itojun committed to the KAME tree.
Alan Cox [Wed, 10 Mar 2004 04:44:43 +0000 (04:44 +0000)]
- Make the acquisition of Giant in vm_fault_unwire() conditional on the
pmap. For the kernel pmap, Giant is not required. In general, for
other pmaps, Giant is required by i386's pmap_pte() implementation.
Specifically, the use of PMAP2/PADDR2 is synchronized by Giant.
Note: In principle, updates to the kernel pmap's wired count could be
lost without Giant. However, in practice, we never use the kernel
pmap's wired count. This will be resolved when pmap locking appears.
- With the above change, cpu_thread_clean() and uma_large_free() need
not acquire Giant. (The first case is simply the revival of
i386/i386/vm_machdep.c's revision 1.226 by peter.)
Robert Watson [Wed, 10 Mar 2004 02:48:50 +0000 (02:48 +0000)]
Lock down IP-layer encapsulation library:
- Add encapmtx to protect ip_encap.c global variables (encapsulation
list).
- Unifdef #ifdef 0 pieces of encap_init() which was (and now really
is) basically a no-op.
- Lock encapmtx when walking encaptab, modifying it, comparing
entries, etc.
- Remove spl's.
Note that currently there's no facilite to make sure outstanding
use of encapsulation methods on a table entry have drained bfore
we allow a table entry to be removed. As such, it's currently the
caller's responsibility to make sure that draining takes place.