the system load average. Previously, the load average measurement
was susceptible to synchronisation with processes that run at
regular intervals such as the system bufdaemon process.
Each interval is now chosen at random within the range of 4 to 6
seconds. This large variation is chosen so that over the shorter
5-minute load average timescale there is a good dispersion of
samples across the 5-second sample period (the time to perform 60
5-second samples now has a standard deviation of approx 4.5 seconds).
be used to index tables of counters.
Remove intr_dispatch() inline, it is implemented directly in tl*_intr now.
Count stray interrupts in a table of counters like intrcnt.
Disable interrupts briefly when setting up the interrupt vector table.
We must disable interrupts completely, not just raise the pil.
Pass pointers to the intr_vector structures rather than a vector number
to sched_ithd and intr_stray.
to kern_synch.c in preparation for adding some jitter to the
inter-sample time.
Note that the "vm.loadavg" sysctl still lives in vm_meter.c which
isn't the right place, but it is appropriate for the current (bad)
name of that sysctl.
Suggested by: jhb (some time ago)
Reviewed by: bde
off to witness_init() making the check for double intializating a lock by
testing the LO_INITIALIZED flag moot. Workaround this by checking the
LO_INITIALIZED flag ourself before we bzero the lock structure.
Add some missing break statements in the socket ioctl switch.
Check the return value from copyin() / copyout().
Fix some disorderings and misindentations.
Support a couple more socket ioctls.
Add missing break statements.
be so dangerous it isn't funny. eg: if you panic inside NFS or softdep,
and then try and sync you run into held locks and cause either deadlocks,
recursive panics or other interesting chaos. Default is unchanged.
- Change LOCK_DEBUG so that it is always on if KTR is compiled in
regardless of the state of KTR_COMPILE. This means that we no longer
need to include sys/ktr.h before sys/lock.h to ensure a valid setting
for LOCK_DEBUG.
- Change the use of LOCK_DEBUG so that it is now always defined and its
value is used instead of merely its definition. That is, instead of
#ifdef LOCK_DEBUG, code should now use #if LOCK_DEBUG > 0.
- Use this latest to #error out in sys/mutex.h if sys/lock.h isn't
included before sys/mutex.h to ensure that the proper versions of the
mutex operations are used.
- As a result of (2) sys/mutex.h no longer includes sys/ktr.h in the
KERNEL case.
Requested by: bde (1)
tracks as /dev/acdNtY.
This solves the problems with having to deal with howmany and which
devices are open.
For hysterical reasons ONLY, make a link to both the acdNa & acdNc devices.
structure. This makes it possible to pre-allocate PTEs for the kernel,
which is necessary for a reliable implementation of pmap_kenter(). This
also avoids wasting space (about 48 bytes per page) for kernel mappings
and user mappings of memory-mapped devices.
This also fixes a bug with the previous version where the implementation
required the pv_entry structure to be physically contiguous but did not
enforce this (the structure size was not a power of two). This meant
that the pv_entry free list was quickly corrupted as soon as the system
was even mildly loaded.
