- use a hash rather than SPLAY trees.
SPLAY tree is a wrong algorithm to use here.
will be revisited if it slows down anything other than
micro-benchmarks.
- optimize the single mapping case (it's a common case) by
embedding an entry into mdpage.
- don't keep a pmap pointer as it can be obtained from ptp.
(discussed on port-i386 some years ago.)
ideally, a single paddr_t should be enough to describe a pte.
but it needs some more thoughts as it can increase computational
costs.
- pmap_enter: simplify and fix races with pmap_sync_pv.
- don't bother to lock pm_obj[i] where i > 0, unless DIAGNOSTIC.
- kill mp_link to save space.
- add many KASSERTs.
instead of directly calling the pcn_79c970_mediachange function, we
must initialize sc->sc_mii.mii_ifp so that this last function is
passed a valid parameter.
Fixes a panic in pcn_79c970_mediachange that arose immediately when
trying to use this interface due to a NULL pointer dereference.
Hi dyoung@!
This delay cause 500us loops under splnet() per linkdown port per mii_tick.
It causes periodically drop packets. It's not acceptable for other devices.
Move gphyter and nsphyter specific delay(500) into the drivers from
mii_physubr.c.
handling, ether_mediastatus() and ether_mediachange(). Check for
a non-ENXIO error return from mii_mediachg(). (ENXIO indicates
that a PHY is suspended.)
This patch shrinks the source code size by 979 lines. There was
a 5100-byte savings on the NetBSD/i386 kernel configuration, ALL.
I have made a few miscellaneous changes, too:
gem(4): use LIST_EMPTY(), LIST_FOREACH().
mtd(4): handle media ioctls, for a change!
axe(4): do not track link status in sc->axe_link any longer
nfe(4), aue(4), axe(4), udav(4), url(4): do not reset all PHYs
on a change of media
Except for the change to mtd(4), no functional changes are intended.
XXX This patch affects more architectures than I can feasibly
XXX compile and run. I have compiled macppc, sparc64, i386. I
XXX have run the patches on i386 boxen with bnx(4) and sip(4).
XXX Compiling and running on evbmips (MERAKI, ADM5120) is in
XXX progress.
'mbr_com0' assumes the BIOS has initialised the baud rate (etc)
'mbr_com0_9600' initialises the rate to 9600
Both have the functionality from 'mbr_ext' (ie they can boot from an
extended partition).
As compiled, the io_address for the serial port is taken from BIOS data.
(this should keep tls@ happy!)
kobj_unload, as an unloaded kobj will already have been freed by an
implicit kobj_unload call in kobj_close. This fixes random panics when a
module fails to load.
bounce into SVC32 mode, there is no per-process data stored on it.
We can therefore use the undefined stack setup by the platform machdep.c
as a system wide undefined stack.
This removes the need for a per-process undefined stack, and the processor
mode switching overhead it causes in cpu_switchto.
The space freed in the USPACE is used to increase the per process kernel
stack size.
jdc