Rather than have a twisty maze of special case allocations, move
instead to a data driven allocation. This should be the most robust
way to cope with the resource problems that the multiplicity of ways
of encoding 5 registers that have the misfortune of not being a power
of 2 nor contiguous.
Also, make it less impossible that pccard will work. I've not been able
to get my libretto floppy working, but it now fails later than before.
phk and I had similar ideas on this during the 5.3 release cycle, but
it wasn't until recently that I could test more than one allocation
scenario.
MFC After: 1 month (5.4 if possible, 5.5 if not)
and tweaks. The code was actually quite broken because it discarded the
upper bits of the 64 bit division. We only had a 50% chance of scaling up
the blocksize for large NFS client mounts when it was needed. For 5.x and
beyond, this was harmless because we could represent the result in either
case. For 4.x this was a big problem though. (4.x also has a df(1) bug to
compound the problem)
happen on the first management frame received from a neighbor; we assume
any merge candidate will send more frames and those should be processed
with a suitable table entry.
Stepped on by: Tai-hwa Liang
interrupts that have a trigger mode of conforming. This fixes problems on
some older machines that still route PCI devices via ISA interrupts when
using an I/O APIC.
Tested by: Peter Trifonov pvtrifonov at mail dot ru
MFC after: 1 month
instead of burying that in the atpic(4) code as atpic(4) is not the only
user of elcr(4). Change the elcr(4) code to export a global elcr_found
variable that other code can check to see if a valid ELCR was found.
MFC after: 1 month
producers rather than consumers as new-bus resources only handle consumed
resources. We already do this for the other ACPI resource types that
support the producer/consumer attribute.
Hold a lock on the table instead of futzing with reference counts which
was potentially dangerous except drivers were quiescent while we did this
so the table contents never changed. Disable the hack logic for removing
scan candidates with multiple association failures; it's never done the
right thing and will be fixed correctly with background scanning goes in.
object (/) rather than the pci bus object when walking the _PRT to force
attach devices. We already look up relative to the root object when doing
interrupt routing.
Suggested by: njl
For such devices, we require _PRS to exist and we warn if any of the
resources in _PRS are not IRQ resources (since we'll have no way of knowing
which of those resources to use without a working _CRS). When it does
come time to set resources, we build up a resource buffer from scratch
as we do for devices with _CRS that only have IRQ resources.
- Fix a bug with setting extended IRQ resources where we set the IRQ value
in the wrong resource structure meaning that whichever IRQ was listed in
_PRS was used instead. This might fix some weird issues on certain boxes
where IRQs > 16 don't seem to work when using ACPI.
- Fix a bug with how we walked the resource buffer after _SRS to call
config_intr() in that the 'end' variable was not properly updated, so we
could either terminate the loop early or loop after the end of the
buffer.
Tested by: pjd
not we're going to process the frame; this makes the counters reflect frames
actually processes instead of received (discarded frames were already counted)
o increase the max per-frame tx descriptor count and the number of tx
buffers for forthcoming fast frame support
o correct the max scatter/gather count; it cannot be larger than the
max(tx,rx,beacon) descriptor counts
(fix imported from madwifi by Takanori Watanabe)
o eliminate save/restore of pci registers handled by the system
o eliminate duplicate zero of the softc (noted by njl)
o consolidate common code
MFC after: 1 week
and always has been, but the system call itself returns
errno in a register so the problem is really a function of
libc, not the system call.
Discussed with : Matthew Dillion <dillon@apollo.backplane.com>
(calling a __dead2 function such as panic() at the end of a function), the
saved %eip on the stack will actually not be part of the function that
executed a call instruction but instead will be the first instruction of
the next function in the text. This happens with dblfault_handler() and
syscall() for example. Work around this in the one place it matters by
looking at the saved %eip - 1 to determine the calling function when we
check for "magic" frames.
MFC after: 2 weeks
provides truer debugger stack traces. For those that want to stick with
-O2 kernel builds, one should probably add -fno-optimize-sibling-calls
so that each stack frame as a frame pointer.
It is semi-promissed by the Release Engineers that when RELENG_6 is
created we go back to -O2.
Desired by: scottl, jhb
they both happen before pipe backing allocation occurs. Previously,
a pipe memory shortage would cause a panic due to a KNOTE call
on an uninitialized si_note.
Reported by: Peter Holm
MFC after: 1 week
for the vast majority of our cards. However, they are critically
needed to distinguish different fe based PC Cards (the FMV-182 from
the 182A) which need to be treated differently (the ethernet address
is loaded not from the standard CIS-based ethernet tuples, but from
differing locations in attribute space based on the version string in
CIS3. This should have no impact for other users of this function.
unhappiness lately.
As far as I can tell, no files that have made it safely to disk
have been endangered, but stuff in transit has been in peril.
Pointy hat: phk
- Introduce the amr_io_lock to control access to command queues, bio queues,
and the hardware.
- Eliminate the taskqueue and do all completion processing in the ithread.
- Assign a static slot number to each command instead of doing a linear
search for free slots each time a command is needed.
- Modify the interrupt handler to more closely match what Linux does, for
safety.
and BBO is BO's backing object. Now, suppose that O and BO are being
collapsed. Furthermore, suppose that BO has been marked dead
(OBJ_DEAD) by vm_object_backing_scan() and that either
vm_object_backing_scan() has been forced to sleep due to encountering
a busy page or vm_object_collapse() has been forced to sleep due to
memory allocation in the swap pager. If vm_object_deallocate() is
then called on BBO and BO is BBO's only shadow object,
vm_object_deallocate() will collapse BO and BBO. In doing so, it adds
a necessary temporary reference to BO. If this collapse also sleeps
and the prior collapse resumes first, the temporary reference will
cause vm_object_collapse to panic with the message "backing_object %p
was somehow re-referenced during collapse!"
Resolve this race by changing vm_object_deallocate() such that it
doesn't collapse BO and BBO if BO is marked dead. Once O and BO are
collapsed, vm_object_collapse() will attempt to collapse O and BBO.
So, vm_object_deallocate() on BBO need do nothing.
Reported by: Peter Holm on 20050107
URL: http://www.holm.cc/stress/log/cons102.html
In collaboration with: tegge@
Candidate for RELENG_4 and RELENG_5
MFC after: 2 weeks
Without this fix, when ACLs are set via tunefs(8) on the root file system,
they are removed on boot when 'mount -a' is called, because mount(8)
called for the root file system always add MNT_UPDATE flag and MNT_UPDATE
flag isn't perfect.
Now, one cannot remove ACLs stored in superblock (configured with tunefs(8))
via 'mount -a' nor 'mount -u -o noacls <file system>', but it is still
possible to mount file system which doesn't have ACLs in superblock via
'mount -o acls <file system>' or /etc/fstab's 'acls' option.
Reported by: Lech Lorens/pl.comp.os.bsd
Discussed with: phk, rwatson
Reviewed by: rwatson
MFC after: 2 weeks
calls MiniportQueryInformation(), it will return NDIS_STATUS_PENDING.
When this happens, ndis_get_info() will sleep waiting for a completion
event. If two threads call ndis_get_info() and both end up having to
sleep, they will both end up waiting on the same wait channel, which
can cause a panic in sleepq_add() if INVARIANTS are turned on.
Fix this by having ndis_get_info() use a common mutex rather than
using the process mutex with PROC_LOCK(). Also do the same for
ndis_set_info(). Note that Pierre's original patch also made ndis_thsuspend()
use the new mutex, but ndis_thsuspend() shouldn't need this since
it will make each thread that calls it sleep on a unique wait channel.
Also, it occured to me that we probably don't want to enter
MiniportQueryInformation() or MiniportSetInformation() from more
than one thread at any given time, so now we acquire a Windows
spinlock before calling either of them. The Microsoft documentation
says that MiniportQueryInformation() and MiniportSetInformation()
are called at DISPATCH_LEVEL, and previously we would call
KeRaiseIrql() to set the IRQL to DISPATCH_LEVEL before entering
either routine, but this only guarantees mutual exclusion on
uniprocessor machines. To make it SMP safe, we need to use a real
spinlock. For now, I'm abusing the spinlock embedded in the
NDIS_MINIPORT_BLOCK structure for this purpose. (This may need to be
applied to some of the other routines in kern_ndis.c at a later date.)
Export ntoskrnl_init_lock() (KeInitializeSpinlock()) from subr_ntoskrnl.c
since we need to use in in kern_ndis.c, and since it's technically part
of the Windows kernel DDK API along with the other spinlock routines. Use
it in subr_ndis.c too rather than frobbing the spinlock directly.
the last action of kern_exit(). Instead, it is a MD callout to cleanup
per-process state during exit.
- Add notes of concern to Alpha and ia64 about the possible need to drop
fp state in cpu_thread_exit() rather than in cpu_exit() since it is
per-thread state rather than per-process.
- ip_fw_chk() returns action as function return value. Field retval is
removed from args structure. Action is not flag any more. It is one
of integer constants.
- Any action-specific cookies are returned either in new "cookie" field
in args structure (dummynet, future netgraph glue), or in mbuf tag
attached to packet (divert, tee, some future action).
o Convert parsing of return value from ip_fw_chk() in ipfw_check_{in,out}()
to a switch structure, so that the functions are more readable, and a future
actions can be added with less modifications.
Approved by: andre
MFC after: 2 months
