purely informational and can give some advance indications of tuning
problems. These are i386 only for now as it seems that the i386 is
the only one suffering kvm pressure.
trap_fatal() to make restarting from panic's slightly easier. Before if
one did 'w 0 0' in ddb, the longjmp in ddb inside of trap_fatal() would
result in Giant being held (or recursed one level deeper) which led to
problems later on. You can now drop to teh debugger, do 'w 0 0', and
continue w/o a problem.
callout_stop() would fail in two cases:
1) The timeout was currently executing, and
2) The timeout had already executed.
We only needed to work around the race for 1). We caught some instances
of 2) via the PS_TIMEOUT flag, however, if endtsleep() fired after the
process had been woken up but before it had resumed execution,
PS_TIMEOUT would not be set, but callout_stop() would fail, so we
would block the process until endtsleep() resumed it. Except that
endtsleep() had already run and couldn't resume it. This adds a new flag
PS_TIMOFAIL to indicate the case of 2) when PS_TIMEOUT isn't set.
- Implement this race fix for condition variables as well.
Tested by: sos
request and just calling it when we get a bridge interrupt. The
problem is that if other code wants to block hardware interrupts for a
little bit with splXXX, those masks aren't updated the way we're doing
it. This doesn't matter for -current, but does for -stable.
The whole reason that we were catching interrupts was to detect that
the card was still there. Ian's fixes however ensure that the card
will be there with an interrupt handler, or not there at all. Since
the pcic interrupt is at a high priority, this should be OK.
This should fix the network related crashes people started seeing in
stable after I merged the pcic as a pci device code.
Submitted indirectly by: Ian Dowse
MFC when: Ian has had a chance to do his torture hang testing.
Add tagged queueing support for new IBM drives.
Add support for Yet Another Promise ATA 100 chip.
Flush disk cache on close.
Dont flush the disk cache on BIO_ORDERED anymore.
Cleanup the tests for DMA on ATAPI devices.
Allow to share ALL irq's even the std irg 14 & 15.
Fix calculation bug in end of media code on CD's.
Add REZERO on opening a CDR/CDRW.
Cleanup ataioctl a bit.
and such was just a bad idea and one that users should be forced to
enable if they want it. This patch introduces a hw.pci.enable_pcibios
tunable for those people. This does not impact the pcibios interrupt
routing at all.
Approved by: peter, msmith
some bios vendors took it apon themselves to "censor" the
host->pci bridges from PCIBIOS callers, even when the caller
explicitly asks for them. This includes certain Compaq machines
(eg: DL360) and some laptops.
If we detect this, shut down pcibios and revert to using IO
port bashing.
Under -current, apcica does a better job anyway.
during trap handlers.
Implement ptrace_set_pc FWIW.
Initialize the pcb window scratch area in setregs(), and setup user
registers as specified by the SCD.
Submitted by: tmm
