in mi_switch() just before calling cpu_switch() so that the first switch
after a resched request will satisfy the request.
- While I'm at it, move a few things into mi_switch() and out of
cpu_switch(), specifically set the p_oncpu and p_lastcpu members of
proc in mi_switch(), and handle the sched_lock state change across a
context switch in mi_switch().
- Since cpu_switch() no longer handles the sched_lock state change, we
have to setup an initial state for sched_lock in fork_exit() before we
release it.
Please note:
When committing changes to this file, it is important to note that
linux is not freebsd -- their system call numbers (and sometimes names)
are different on different platforms. When in doubt (and you always need
to be) check the arch-specific unistd.h and entry.S files in the linux
kernel sources to see what the syscall numbers really are.
ABI change. There is some serious evilness here to work around some
gcc weaknesses. We need to know the sizeof(FILE) manually until __sF
goes away in the next major bump. We have the size for Alpha and i386,
missing is ia64, ppc and sparc* (and i386 with 64 bit longs).
At some point down the track we can change the stdin etc #defines to
stop hard coding the size of FILE into application binaries.
Lots of head scratching and ideas and testing by: green, imp
does include code for the alpha, but as far as I can tell, it is
non-functional (e.g. it's not even compiled by the native openssl build on
the alpha).
Noticed by: gallatin
: As some manual pages are intended only for specific architectures,
: man searches any subdirectories, with the same name as the current
: architecture, in every directory which it searches. Machine specific
: areas are checked before general areas. The current machine type may
: be overridden by setting the environment variable MACHINE to the name
: of a specific architecture.
Instead of trying to delete packages in the same order as they were specified
in the command line, reorder deletion in such a way that if package A depends
on package B then package A will be deleted before B no matter in which order
they were specified in the command line.
Reviewed by: jkh, will
Approved by: jkh
ports/INDEX,v is currently 19.97MB and will blow this limit on the next
update. Let's try doubling the limit again, to give us time to get
around to removing the limit altogether.
is sent to a process, psignal() needs to schedule an AST for the
process if the process is runnable, not just if it is current, so that
pending signals get checked for on the next return of the process to
user mode. This wasn't practical until recently because the AST flag
was per-cpu so setting it for a non-current process would usually just
cause a bogus AST for the current process.
For non-current processes looping in user mode, it took accidental
(?) magic to deliver signals at all. Signals were usually delivered
late as a side effect of rescheduling (need_resched() sets astpending,
etc.). In pre-SMPng, delivery was delayed by at most 1 quantum (the
need_resched() call in roundrobin() is certain to occur within 1
quantum for looping processes). In -current, things are complicated
by normal interrupt handlers being threads. Missing handling of the
complications makes roundrobin() a bogus no-op, but preemptive
scheduling sort of works anyway due to even larger bogons elsewhere.
always on curproc. This is needed to implement signal delivery properly
(see a future log message for kern_sig.c).
Debogotified the definition of aston(). aston() was defined in terms
of signotify() (perhaps because only the latter already operated on
a specified process), but aston() is the primitive.
Similar changes are needed in the ia64 versions of cpu.h and trap.c.
I didn't make them because the ia64 is missing the prerequisite changes
to make astpending and need_resched per-process and those changes are
too large to make without testing.
through the use of a new build directive, MACHINE_CPU, which contains a
list of the CPU generations/features for which optimizations are desired.
This feature will be extended to cover the ports tree in the future.
Currently OpenSSL provides optimizations for i386, i586 and i686-class
CPUs. Currently it has not been tested on an i386 or i486.
Teach make(1) to provide sensible defaults for MACHINE_CPU if it is not
defined (namely, the lowest common denominator CPU we support for each
architecture). Currently this is i386 for the i386 architecture and ev4
for the alpha. sys.mk also sets the variable as a last resort for
consistency with MACHINE_ARCH and bootstrapping from very old versions of
make.
Benchmarks show a significant speed increase even in the i386 case, with
additional improvements for i586 and i686 systems. For maximum performance
define MACHINE_CPU=i686 i586 i386 in /etc/make.conf.
Based on a patch submitted by: Mike Silbersack <silby@silby.com>
Reviewed by: current
tsc_present in the right places (together with other variables of the
same linkage), and don't use messy ifdefs just to avoid exporting it in
some cases.
