device is open. This allows certain old and rather special dual
floppy controllers to work on both channels, as long as you only
have one open at a time.
When two drivers share an ISA DMA channel, they both call isa_dmainit()
and the second call fails if DIAGNOSTIC is on.
If isa_dmainit() was already called successfully, just return silently.
This only works if both drivers agree on the bounce buffer size,
but since sharing DMA is usually only possible on very special
hardware and then typically only for devices of the same type (which
would have multiple instances of the same device driver), this is
not a problem in practice.
belong in the respective drivers. I've not removed ALL of them, as a
few still haven't moved. I've just removed the ones that aren't used.
# these can be removed from amd64, but I'm having issues getting to
# sledge at the moment for a build.
named link, foo_link or link_foo to lnk, foo_lnk or lnk_foo, fixing
signed / unsigned comparisons, and shoving unused function arguments
under the carpet.
I was hoping WARNS?=6 might reveal more serious problems, and perhaps
the source of the -O2 breakage, but found no smoking gun.
- Eliminate the use of a recursive mutex.
- Mark the driver INTR_MPSAFE.
This work is incomplete and will be refined in a future commit.
- Most notably, _locked() variants of entry points need to be introduced.
- The mii upcall/downcall may still be racy.
- Add a stubbed-out guard against racing rl_detach() for the time being.
Tested on: UP, debug.mpsafenet && !debug.mpsafenet
Reviewed by: silence on -net
Use C99 types. Use ANSI function definitions. Sort prototypes.
Split long lines correctly. Punctuate/wordsmith comments.
Use device_printf()/if_printf() where possible.
Reviewed by: -net (silence)
- Eliminate the use of a recursive mutex.
- Mark the driver as INTR_MPSAFE.
- Split the default media choice code out into xl_choose_media() to
avoid making poor assumptions about the state of the lock during attach.
- The miibus upcall/downcall paths may still be racy.
Change to commented-out locking assertions there for now.
- Tested with nfsclient, routed, ssh, ntp, dhclient and quagga bgpd.
- This needs SMP test coverage. I do not have such resources.
Tested on: UP, !debug.mpsafenet && debug.mpsafenet
Hardware: 3C905B-TX (0x905510b7)
Speed up the syncer when shutting down by sleeping for a shorter
period of time instead of cranking up rushjob and using the
normal one second sleep.
Skip empty worklist slots when shutting down to avoid lengthy
intervals of inactivity.
Give I/O more time to complete between steps by not speeding the
syncer quite as much.
Terminate the syncer after one full pass through the worklist
plus one second with the worklist containing nothing but syncer
vnodes.
Print an indication of shutdown progress to the console.
Add a sysctl, vfs.worklist_len, to allow the size of the syncer worklist
to be monitored.
- Use device_printf() during device probe/attach.
- Move if_xname initialization to before xl_reset() is called.
- Use if_printf() at all other times after struct ifnet has been
initialized.
