but with slightly cleaned up interfaces.
The KSE structure has become the same as the "per thread scheduler
private data" structure. In order to not make the diffs too great
one is #defined as the other at this time.
The KSE (or td_sched) structure is now allocated per thread and has no
allocation code of its own.
Concurrency for a KSEGRP is now kept track of via a simple pair of counters
rather than using KSE structures as tokens.
Since the KSE structure is different in each scheduler, kern_switch.c
is now included at the end of each scheduler. Nothing outside the
scheduler knows the contents of the KSE (aka td_sched) structure.
The fields in the ksegrp structure that are to do with the scheduler's
queueing mechanisms are now moved to the kg_sched structure.
(per ksegrp scheduler private data structure). In other words how the
scheduler queues and keeps track of threads is no-one's business except
the scheduler's. This should allow people to write experimental
schedulers with completely different internal structuring.
A scheduler call sched_set_concurrency(kg, N) has been added that
notifies teh scheduler that no more than N threads from that ksegrp
should be allowed to be on concurrently scheduled. This is also
used to enforce 'fainess' at this time so that a ksegrp with
10000 threads can not swamp a the run queue and force out a process
with 1 thread, since the current code will not set the concurrency above
NCPU, and both schedulers will not allow more than that many
onto the system run queue at a time. Each scheduler should eventualy develop
their own methods to do this now that they are effectively separated.
Rejig libthr's kernel interface to follow the same code paths as
linkse for scope system threads. This has slightly hurt libthr's performance
but I will work to recover as much of it as I can.
Thread exit code has been cleaned up greatly.
exit and exec code now transitions a process back to
'standard non-threaded mode' before taking the next step.
Reviewed by: scottl, peter
MFC after: 1 week
denote a directory. Unfortunately, in the presence of GNU or POSIX
extensions, this code was checking the truncated filename stored in the
regular header rather than the full filename stored in the extended
attribute. As a result, long filenames with '/' in just the right
position would trigger this check and be erroneously marked as
directories. Move the check so it only considers the full filename.
Note: the check can't simply be disabled for archives that contain
these extensions because there are some very broken archivers out
there.
Thanks to: Will Froning
MFC after: 3 days
make kernel. Update the compatibility slice section. Note about
updating devices in the kernel config file. MAKEOBJDIRPREFIX changes
and mention the port alternative to COMPAT4X=yes. Fix copyright.
This should be MFC'd.
since otherwise the initial seek offset will contain the directory
offset of the filesystem block that contained its directory entry.
This bug was mostly harmless because typically the directory is
less than one filesystem block in size so the offset would be zero.
It did however generally break loading a kernel from the (large)
kernel compile directory.
Also reset the seek pointer when a new inode is opened in read_inode(),
though this is not actually necessary now because all callers set
it afterwards.
agp(4) AMD64 GART support,
hw.pci.allow_unsupported_io_range removed,
debug.kdb.stop_cpus sysctl,
COMPAT_LINUX32 kernel option on amd64,
mac_bsdextended_firstmatch_enabled sysctl,
mac_bsdextended_logging sysctl,
MP_WATCHDOG kernel option and debug.leak_schedlock sysctl,
NET_WITH_GIANT kernel option and debug.mpsafenet loader tunable,
debug.mpsafevm loader tunable,
vm_map_findspace(9) now uses an O(log n) algorithm,
new ipfw(4) rule "jail",
IPFIREWALL_FORWARD kernel option,
PFIL_HOOKS is now always complied into the kernel,
autofs filesystem and libautofs(3) added,
GEOM_RAID3 geom class and graid3(8) added,
GEOM_UZIP geom class added,
acpidump(8) SSDT tables support,
dd(1) fillchar option,
jail(8) -l option,
OpenSSL VIA C3 PadLock ACE support imported, and
FreeBSD's default X Window System is Xorg now.
Update release notes:
ADAPTIVE_GIANT enabled on i386 by default,
hme(4) now MI,
static linker TLS support,
LIBPTHREAD_PROCESS_SCOPE,
GNU sort updated to a coreutils snapshot as of 2004/08/12,
ISC DHCP client updated to 3.0.1,
lukemftpd updated to a snapshot as of 2004/08/09, and
pf from OpenBSD 3.5-stable.
write and zero-fill faults to run without holding Giant. It is still
possible to disable Giant-free operation by setting debug.mpsafevm to 0 in
loader.conf.
By using r8 instead of r14 to do the swap, we put the dst argument
in the return register. Since bcopy() doesn't clobber r8, we don't
have to do anything else. This fixes ports/textproc/aspell.
