operation using NET_NEEDS_GIANT(). This will result in a boot-time
restoration of Giant-enabled network operation, or run-time warning on
dynamic load (applicable only to the Netgraph component). Additional
components will likely need to be marked with this in the future.
SCSI controllers. The driver was removed before FreeBSD 3.0, so it is
probably time to remove from the Hardware Notes... :-).
Historical clue by: Josh Paetzel <josh@tcbug.org>
MFC after: 3 days
will cause the network stack to operate without the Giant lock by
default. This change has the potential to improve performance by
increasing parallelism and decreasing latency in network processing.
Due to the potential exposure of existing or new bugs, the following
compatibility functionality is maintained:
- It is still possible to disable Giant-free operation by setting
debug.mpsafenet to 0 in loader.conf.
- Add "options NET_WITH_GIANT", which will restore the default value of
debug.mpsafenet to 0, and is intended for use on systems compiled with
known unsafe components, or where a more conservative configuration is
desired.
- Add a new declaration, NET_NEEDS_GIANT("componentname"), which permits
kernel components to declare dependence on Giant over the network
stack. If the declaration is made by a preloaded module or a compiled
in component, the disposition of debug.mpsafenet will be set to 0 and
a warning concerning performance degraded operation printed to the
console. If it is declared by a loadable kernel module after boot, a
warning is displayed but the disposition cannot be changed. This is
implemented by defining a new SYSINIT() value, SI_SUB_SETTINGS, which
is intended for the processing of configuration choices after tunables
are read in and the console is available to generate errors, but
before much else gets going.
This compatibility behavior will go away when we've finished the last
of the locking work and are confident that operation is correct.
Previously, it would recognize it as a valid shell only
if the basename (nologin) was specified. Now, it will
recognize both the basename and the full path.
NOTE: The full path as adduser(8) understands it is /usr/sbin/nologin.
There is a symlink, /sbin/nologin, but that's deprecated and
only there for backwards compatibility.
ru_RU.CP866.src, the previous version of this file contained a strange
conversion error: nostr had U+255C BOX DRAWINGS UP DOUBLE AND LEFT SINGLE
instead of U+0435 CYRILLIC SMALL LETTER IE.
This way of operation is more robust than the "AI" used
before.
Add flags to mbr accessible from make.conf as BOOT_MBR_FLAGS.
Only one flag is defined now, "allow using packet mode", which
is 0x80 in accord with the rest of i386 boot code. The "packet"
flag is on by default.
PR: i386/70241
Submitted by: Valentin Nechayev <netch <@> netch.kiev.ua> (inital version)
Discussed with: jhb (by Valentin Nechayev)
Tested on: bochs (with EDD turned on or off by patching the BIOS), PCs
the flag, fall back to the old INT13/AH=02 function if that fails.
This way of operation is less likely to fail with modern BIOSes and
large disks of strange geometries.
PR: i386/70241
Submitted by: Valentin Nechayev <netch <@> netch.kiev.ua> (inital version)
Discussed with: jhb (by Valentin Nechayev)
Tested on: bochs (with EDD turned on or off by patching the BIOS), PCs
from list_net_interfaces() when network_interfaces=auto.
Rationale: Since the auto case is special, the lesser evil
had to be chosen among not adding cloned interfaces to
_tmplist or removing duplicates from _tmplist after adding
cloned interfaces. Since list_net_interfaces() must not use
/usr/bin tools, the former "evil" appeared clearer and much
more efficient. (See the PR audit trail for discussion.)
PR: conf/63700
Reviewed by: brooks
MFC after: 5 days
need of sched_lock in some places. Also in thread_userret, remove
spare thread allocation code, it is already done in thread_user_enter.
Reviewed by: julian
preemption and/or the rev 1.79 kern_switch.c change that was backed out.
The thread was being assigned to a runq without adding in the load, which
would cause the counter to hit -1.
o Add MOUSE_PS2_TAP into syncmask[0] correctly when we're built with
PSM_CONFIG_FORCETAP. The previous code from revision 1.56 attempted
to do this but updated the a mask variable that would be clobbered later.
o If syncmask[1] hasn't yet been set when ioctl(MOUSE_GETMODE) is called,
zero syncmask[0] and syncmask[1] so that sync validation is effectively
disabled in userland applications and moused doesn't misbehave. The
psm driver performs sync validation so there is no loss in functionality
in clearing the sync mask.
o If PSM_NEED_SYNCBITS is set, setup syncmask[1], even if it's already
correct. This prevents the PSM_NEED_SYNCBITS bit from being left on
after a re-initialisation and erroneously causing a subsequent
out-of-sync packet to mis-set syncmask[1].
o Remove PSM_SYNCERR_THRESHOLD1. This value specified how many sync
errors were required before the mouse is re-initialised.
Re-initialisation is now done after (packetsize * 2) sync errors as
things aren't likely to improve after that.
o Reset lastinputerror when re-initialisation occurs. We don't want
to continue to drop data after re-initialisation.
o Count the number of failed packets independently of the syncerrors
statistic. syncerrors is useful for recovering sync within a single
packet. pkterrors allows us to detect when the mouse changes its
packet mode due to some external event (e.g. KVM switch).
o Reinitialize the mouse if we see more than psmpkterrthresh errors
during the validation period. The validation period begins as soon
as a sync error is detected and continues until psmerrsecs/msecs
time has elapsed. The defaults for these two values force a reset
if we see two packet errors in a 2 second period. This allows rapid
detection of packet framing errors caused by the mouse changing packet
modes.
o Export psmpkterrthresh as a sysctl
o Export psmloglevel as a sysctl.
o Enable more debugging code to be enabled at runtime via psmloglevel.
o Simplify verbose conditioned loging by using a VLOG macro.
o Add several comments describing the sync recovery algorithm of
this driver.
Large Portions by: Brian Somers <brian@Awfulhak.org>
Inspired and Frustrated by: Belkin KVMs
Reviewed by: njl, philip
pollfd's to avoid calling malloc() on small numbers of fd's. Because
smalltype's members have type char, its address might be misaligned
for a struct pollfd. Change the array of char to an array of struct
pollfd.
PR: kern/58214
Submitted by: Stefan Farfeleder <stefan@fafoe.narf.at>
Reviewed by: bde (a long time ago)
MFC after: 3 days
these two reasons:
1. On ia64 a function pointer does not hold the address of the first
instruction of a functions implementation. It holds the address
of a function descriptor. Hence the user(), btrap(), eintr() and
bintr() prototypes are wrong for getting the actual code address.
2. The logic forces interrupt, trap and exception entry points to
be layed-out contiguously. This can not be achieved on ia64 and is
generally just bad programming.
The MCOUNT_FROMPC_USER macro is used to set the frompc argument to
some kernel address which represents any frompc that falls outside
the kernel text range. The macro can expand to ~0U to bail out in
that case.
The MCOUNT_FROMPC_INTR macro is used to set the frompc argument to
some kernel address to represent a call to a trap or interrupt
handler. This to avoid that the trap or interrupt handler appear to
be called from everywhere in the call graph. The macro can expand
to ~0U to prevent adjusting frompc. Note that the argument is selfpc,
not frompc.
This commit defines the macros on all architectures equivalently to
the original code in sys/libkern/mcount.c. People can take it from
here...
Compile-tested on: alpha, amd64, i386, ia64 and sparc64
Boot-tested on: i386
- Clean up and improve handling of trailing punctuation characters.
- Handle the Pa macro.
- Give a warning when ignoring unimplemented mdoc commands.
MFC after: 3 days
