reference count is initialised to zero to be more kosher.
Reviewed by: Bosko Milekic <bmilekic@technokratis.com>
Spotted by: jdp and Jake Burkholder <jburkhol@home.com> respectively
elements defined by foo_if.c aren't sharable amoung modules (I'm
working on a bug report for it now), or else I don't understand
something. It showed up as kobj functions not being called.
In any event, link in the pcic and pccard parts of the modules to work
around the problem for now.
that should be better.
The old code counted references to mbuf clusters by using the offset
of the cluster from the start of memory allocated for mbufs and
clusters as an index into an array of chars, which did the reference
counting. If the external storage was not a cluster then reference
counting had to be done by the code using that external storage.
NetBSD's system of linked lists of mbufs was cosidered, but Alfred
felt it would have locking issues when the kernel was made more
SMP friendly.
The system implimented uses a pool of unions to track external
storage. The union contains an int for counting the references and
a pointer for forming a free list. The reference counts are
incremented and decremented atomically and so should be SMP friendly.
This system can track reference counts for any sort of external
storage.
Access to the reference counting stuff is now through macros defined
in mbuf.h, so it should be easier to make changes to the system in
the future.
The possibility of storing the reference count in one of the
referencing mbufs was considered, but was rejected 'cos it would
often leave extra mbufs allocated. Storing the reference count in
the cluster was also considered, but because the external storage
may not be a cluster this isn't an option.
The size of the pool of reference counters is available in the
stats provided by "netstat -m".
PR: 19866
Submitted by: Bosko Milekic <bmilekic@dsuper.net>
Reviewed by: alfred (glanced at by others on -net)
has the side effect of detaching the children before I delete them.
When I put the last commits in a loop for loop it died after 5 or so
iterations. After this change, I lasted 50 before I stopped the test.
Add pcic_detach which removes all of the pcic's children.
This lets me load/unload pcic multiple times w/o having multiple
instances of each slot attached to pcic.
it to a mbuf. This patch makes it attach it to mbuf. This patch
is in preperation for Bosko Milekic's mbuf external reference
counting patches.
PR: 19866 (first stage)
Submitted by: Ian Dowse <iedowse@maths.tcd.ie>
Reviewed by: alfred
problems). Also pick an irq if one isn't specified. Ditto for
memory.
Add additional printfs in the error paths. These will disappear in time.
There are still some panics, but this is a good checkpoint.
/boot/device.hints in the bin dist during releases so that current snapshots
have a chance of booting up ok after installing. The real fix for this
problem is to rewrite userconfig in Forth, stick it in the loader, axe
userconfig from the kernel, and extract the hints from the booted kernel in
sysinstall similar to the way we generate /boot/kernel.conf right now. For
now, however, this will have to do.
suggested fix in PR 12378.
Keep track of all existing pmaps independent of existing processes.
This allows for a process to temporarily connect to a different address
space without the risk of missing an update of the original address space if
the kernel grows.
pmap_pinit2() is no longer needed on the i386 platform but is left as a
stub until the alpha pmap code is updated.
PR: 12378
some of the fake devices sometimes seen on single device ATA
channels.
Proberly fail on failures in ata-disk.c, retry instead of hang.
Cleanup the VIA probe/init code a bit.
Fix a couble of missing free's in atapi-cd.c in the changer code.
Add support for AMD RAID controllers as "disks".
Requested-by: Marius Bendiksen <mbendiks@eunet.no>
Remove potential panic when attempting to open non-existent drivers.
init_drive: Return error codes correctly. Previously it would
occasionally return 0. The error was redetected
elsewhere, but this was causing a number of confusing
error messages.
Add support for wi(4) compatible configuration interface. It enables
wicontrol(8) to configure some 802.11 specific parameters.
Some minor fixes from NetBSD.
Obtained from: NetBSD current
length of NWID. This breaks binary compatibility but only the awi driver
refers this ioctl; no userland tools refers it.
Add WEP stuff.
Obtained from: NetBSD current
in bogus hwptr warnings. Further comments sought on -hackers
were not forthcoming. I can only hope that calling DELAY() like
this doesn't cause any heartburn.
Make the umass driver depend on this module.
Makes it possible to compile the kernel without SCSI support and load it
when for example a USB floppy is conencted.
