is little or no reason to create a swap pager for small mmap's. The
vm_map_insert code will automatically create a swap pager if the object
becomes too large. This fix, per a request from phk.
and then never accept for sending packet from upper layer anymore
(i.e. ping -f )
Reviewed by: David Greenman <dg@root.com>
Submitted by: amurai@spec.co.jp
performance issues.
1) The pmap module has had too many inlines, and so the
object file is simply bigger than it needs to be.
Some common code is also merged into subroutines.
2) Removal of some *evil* PHYS_TO_VM_PAGE macro calls.
Unfortunately, a few have needed to be added also.
The removal caused the need for more vm_page_lookups.
I added lookup hints to minimize the need for the
page table lookup operations.
3) Removal of some bogus performance improvements, that
mostly made the code more complex (tracking individual
page table page updates unnecessarily). Those improvements
actually hurt 386 processors perf (not that people who
worry about perf use 386 processors anymore :-)).
4) Changed pv queue manipulations/structures to be TAILQ's.
5) The pv queue code has had some performance problems since
day one. Some significant scalability issues are resolved
by threading the pv entries from the pmap AND the physical
address instead of just the physical address. This makes
certain pmap operations run much faster. This does
not affect most micro-benchmarks, but should help loaded system
performance *significantly*. DG helped and came up with most
of the solution for this one.
6) Most if not all pmap bit operations follow the pattern:
pmap_test_bit();
pmap_clear_bit();
That made for twice the necessary pv list traversal. The
pmap interface now supports only pmap_tc_bit type operations:
pmap_[test/clear]_modified, pmap_[test/clear]_referenced.
Additionally, the modified routine now takes a vm_page_t arg
instead of a phys address. This eliminates a PHYS_TO_VM_PAGE
operation.
7) Several rewrites of routines that contain redundant code to
use common routines, so that there is a greater likelihood of
keeping the cache footprint smaller.
blocked in a write() while waiting for the output to drain, sleep only
for tp->t_timeout, not forever. This only seems to happen when there is
either a modem lockup holding the hardware flow control down, or due to
some problem in the driver with processes attempting to write after the
modem has hung up (eg: elm, tf).
aliases of the "official" names as well, because now that getportbyname()
does a yp match, it no longer found the entries under the alias.
This broke rsh(1), because it looks up "shell/tcp" while the official
name in /etc/services is "cmd/tcp".
when attepmting to add certain types of routes. This problem
only manifested itself in the presence of unconfigured point-to-point
interfaces.
Noticed by: Chuck Cranor <chuck@maria.wustl.edu>
of line.
Also, fix existing bug in ethers.byname, it was passing an unknown option
to yppush. This appears to have been a cut/paste slip intended for a
$(DBLOAD) command above it.
the FreeBSD Makefile.yp structure by me. This allows you to have a single
amd map for all machines in a cluster.
In /etc/sysconfig, it would look something like:
amdflags="-p -a /net -c 1800 -l syslog /host amd.host"
Saves about 280 butes of source per driver, 56 bytes in object size
and another 56 bytes moves from data to bss.
No functional change intended nor expected.
GENERIC should be about one k smaller now :-)
the obsolete() function to convert dump-style args to getopt-style
args doesn't check to see that 'f' really has an argument following
the option string in argv[1].
Submitted-By: jmacd
there is no target to make.
% make
make: make: no target to make.
%
Beause the function Punt() in main.c takes care of leading 'make:' and
trailing newline, so, there is no need to pass explicitly.
Submitted by: enami@ba2.so-net.or.jp
Obtained from: NetBSD GNATS
