me:
1) TLB flush optimization that effectively eliminates half of all of the
TLB flushes. This works by only flushing the TLB when a page is "present"
in memory (i.e. the valid bit is set in the page table entry). See section
5.3.5 of the Intel 386 Programmer's Reference Manual.
2) The handling of "CMAP" has been improved to catch attempts at multiple
simultaneous use.
John:
1) Added pmap_qenter/pmap_qremove functions for fast mapping of pages into
the kernel. This is for future optimizations and support for the upcoming
merged VM/buffer cache.
Reviewed by: John Dyson
the interface output queue and further udp packets would be fragmented
and only partially sent - keeping the output queue full and jamming the
network, but not actually getting any real work done (because you can't
send just 'part' of a udp packet - if you fragment it, you must send
the whole thing). The fix involves adding a check to make sure that the
output queue has sufficient space for all of the fragments.
Imported libmd. This library contains MD2, MD4 and MD5.
These three boggers pop up all over the place all of the time, so I
decided we needed a library with them. In general they are used for
security checks, so if you use them you want to link them static.
a tty.
Note that this might conflict with the collateral use of TS_WOPEN, but
for the moment I can find no problems associated with this. (TS_WOPEN
will likely go away in the future anyway). This should be looked at
again in the future (the potential problem is that the cblock pool
may either run out or accumulate too many cblocks).
from David Greenman, Bruce Evans and Julian Elischer.
They are:
[vnode pager - David/Bruce]:
The following patch fixes a problem where some data could be lost in a
delayed-write buffer if the cached buffer was larger than a page. This fix was
provided by Bruce Evans and modified slightly by me.
[st.c - Julian]:
My fix for "bad request, must be between 0 and 0"
RTFS if you're interested).
[gnu/fpemul - David/Bruce]:
These changes fix single stepping of emulated FPU instructions.
Previously, the instruction after an emulated instruction was
executed without causing a SIGTRAP ...
The also fix the initial control word being different for the
GPL emulator (it is still wrong for the old emulator) and remove
an unnecessary panic when emulation is not configured (I hope at
least init, sh and reboot will run without floating point. I
remember only df and mkfs being broken by the lack of FP in 0.0).
[Various fixes described below - Bruce/David]:
sys/i386/boot/boot2.S:
Yet another attempt to propagate the correct fix for 16 vs
32-bit mode bugs. [verified]
sys/i386/i386/db_interface.c:
Protect against reentering Debugger().
sys/kern/kern_time.c:
Don't allow 'time.tv_usec == 0' except at clock interrupts.
sys/pcfs/pcfs_fat.c:
Make it compile without -O.
sys/scsi/sd.c:
Fix as posted to some freebsd mailing list.
(changes the order of the assignment of "sectors" because it earlier
value is needed first -DG)
sys/vm/vm_glue.c:
Fix stale comments and verbose code.
sys/vm/vm_mmap.c
Fix off by 1 errors and verbose code.
[From Nate - cosmetic but non-intrusive and useful enough to go in]
sys/i386/isa/isa.c:
Appended you'll find a patch to the NMI error log routine in isa/isa.c.
The below patch just adds some additional information when an NMI occurs
which can help debug the hardware problem.
based originally on work by David Greenman and adapted to FreeBSD
(and cleaned up a bit) by myself. It supports the IBM Credit Card
Adapter for the IBM Thinkpad, and I've had no trouble making it work
on my Toshiba T1910 with a National `InfoMover' NE4100 PCMCIA ethernet
card (I'm commiting this message through it right now :-).
This is actually sneaking it in after feature-freeze, but it's just
too useful to pass up! As always, necessity is a mother.
initializing it to 0 in the floppy boot case. This allows my Toshiba
1910 laptop to finally boot, and may help out other machines cursed
with early Phoenix BIOS's as well.
From Bruce Evans:
fu[i]byte() checked the wrong register. This caused interesting behaviour
in the GPL math emulator. The emulator does not check the values returned
by fu*() or su*() (:-() and it interpreted the address of -12(%ebp) as
-1(%ebp). The same probably occurs for all signed 8-bit offsets from
registers.
I cleaned up the new bzero() a bit.
Vastly improved trap.c from me. This rewritten version has a variety of
features, amoung them: higher performance and much higher code quality.
support.s, cpufunc.h:
No longer use gs override to enforce range limits - compare directly
against VM_MAXUSER_ADDRESS instead. The old way caused problems in
preserving the gs selector...and this method is just as fast or faster.
