Fail sched_catchlwp() if mutex_tryenter() on the remote CPU's state fails.
Seems to work around the issue described in this PR.
XXX Stealing jobs from remote CPUs could probably be moved into the idle
loop, making the locking quite a bit simpler.
- Do timeslicing for SCHED_RR threads. At ~16Hz it's too slow but better
than nothing. XXX
- If a SCHED_OTHER thread has hogged the CPU for 1/8s without taking a
trip through mi_switch(), try to force a kernel preemption to give other
threads a chance.
nonexistent programs on $PATH and nonexistent programs with an absolute
pathname, so we ought to test both.
If anyone creates a program called nonexistent-program-on-path and
thereby breaks this test for themselves, they deserve it. ;-)
Also prune a no-longer-used shell variable.
than a zero-terminated list; this makes the code simpler and also
hopefully fixes the recent "childdet" botch, see PR kern/38528
-handle the root hub specially a bit earlier, this allows to kick out
the "submatch" functions completely which needed to second-guess
from the port number (where "0" meant root hub")
(we could handle the root hub specially even earlier, but as done
now big parts of the hub emulation code are exercised regularely,
this would bitrot otherwise)
physical drives belong to which logical drive, so all the physical drives
will show up for logical drive 0, and also appear for logical drives that
are rebuilding so that the rebuild state will show the physical drive
being rebuilt. Locking for the scratch buffer is currently missing - system
quickly quits responding when I try to lock the buffer with mutex_{enter,exit}().
being restricted to the #!/bin/sh used to run atf; (2) you can tell what
happened when it fails, since it does currently fail; (3) it runs all the
cases even when some of them don't work, and fails only at the end.
- bsdtar is using the hardlink resolver code from libarchive now,
making it generate correct links for newc format
- fix a number of non-exploitable integer and buffer overflows
- SIGINFO/SIGUSR1 support for bsdtar
- bsdtar -s support
- better mtree support, it should now be able to handle the full syntax
of NetBSD's mtree
- handle extraction of archives where hardlink and linked to entry don't
agree on the permission (base.tgz has such entries for systat)
AMD K8 and newer will trap when enabling the NX support outside PAE
paging mode. The AMD64 wake code was restoring the MSR EFER to switch to
Long Mode and naturally didn't have paging enabled at that point.
While this works fine with Intel CPUs, it resulted in an immediate
reboot with AMD processors.
Fixed by a joint brain storming session of jmcneill@, cegger@ and
myself, based on some input from the hardware developers. This fixes
PR 38587.
SCHED_FIFO threads
- Change condvar sync so that we never take the condvar's spinlock without
first holding the caller-provided mutex. Previously, the spinlock was only
taken without the mutex in an error path, but it was enough to trigger the
problem described in the PR.
- Even with this change, applications calling pthread_cond_signal/broadcast
without holding the interlocking mutex are still subject to the problem
described in the PR. POSIX discourages this saying that it leads to
undefined scheduling behaviour, which seems good enough for the time being.
- Elsewhere, use a hash of mutexes instead of per-object spinlocks to
synchronize entry/exit from sleep queues.
- Simplify how sleep queues are maintained.
ad