and uncontrolled growth.
The key fix is from Dan Carasone, who noticed that buf_canfree() was
counting in _bytes_ but freeing in _buffers_, which caused the instant
drop to lowater observed by some users.
We now control the rate of growth; the probability of getting a new
allocation is inversely proportional to the current size of the
cache. This idea is from a long-ago conversation with Kirk McKusick
and, if memory serves, was used for the file-system cache in some
other BSD variant at some point in history.
With growth and shrinkage more or less dealt with, we return the
default maximum cache size to 15%. The default _minimum_ cache size
is raised from 1/16 of the maximum cache size to 1/8, since 1/16 was
chosen when the maximum size was 30% of memory.
Finally, after observing the behaviour of the pagedaemon and the
buffer cache drainer under pathological workloads (e.g. a benchmark
that steps through 75% of available memory backwards) I have moved
the call to buf_drain() to the beginning of the pagedaemon from the
end; if the pagedaemon bogs down, it still won't get run as often
as it should, but at least this way it will see the state of the
free count and free target _before_ the scan step does its thing.
the recently introduced files.ppbus.
Also, let the mvme68k port use it's own lpt implementation for now,
so define USE_ALT_LPT option in std.memv68k.
This makes the mvme68k kernels configure and build again.
* Some MAKEVERBOSE support.
* Add some variables to simplify various rules.
* Simply script startup by replacing ${SETSENV} with ${SETSCMD}, which
cd's to ${.CURDIR} before doing the work.
the package to be deleted. (Previously, the Fake mode only mentioned
deinstalling other dependent packages but didn't say anything
Verbose about the package itself.)
obmitted resulting in a compilation failure in the autobuilds.
It effectively removes the now redundant reference to "beep.h" and removes
an associated prototype that wasn't used.
additional "const char *savename" and "u_int32_t mtime" parameters that
are written out into the gzip header in the mtime field and as the original
filename.
- for in-kernel maps, disable map entry merging so that
unmap operations won't block. (workaround for PR/24039)
- for in-kernel maps, allocate kva for vm_map_entry from
the map itsself and eliminate MAX_KMAPENT and
uvm_map_entry_kmem_pool.
wiz