routines (V86 requests from the client and hardware interrupt handlers):
- Install trampoline real mode interrupt handlers at IDT vectors 0x20-0x2f
to handle hardware interrupts by invoking the appropriate vector (0x8-0xf
or 0x70-0x78). This allows the 8259As to use vectors 0x20-0x2f in real
mode as well as protected mode will ensuring that the master 8259A
doesn't share IDT space with CPU exceptions in protected mode.
- Since we don't need to reserve space for page tables and a page directory
anymore since dropping paging support, move the TSS and protected mode
IDT up by 16k. Grow the ring 1 link stack by 16k as a result.
- Repurpose the ring 1 link stack to be used as a real mode stack when
invoking real mode routines either via a V86 request or a hardware
interrupts. This simplifies a few things as we avoid disturbing the
original user stack.
- Add some more block comments to explain how the code interacts with the
V86 structure as this wasn't immediately obvious from the prior comments
(e.g. that we explicitly copy the seg regs for real mode out of the V86
struct onto the stack to be popped off when going into real mode, etc.).
Also, document some of the stack frames we create going to real mode and
back.
- Remove all of the virtual 86 related code including having to simulate
various instructions and BIOS calls on a trap from virtual 86 mode.
- Explicitly panic if a user client attempts to perform a V86 CALL
request that isn't a far call.
- Bump version to 1.2.
Assuming this works ok this should fix some of the long standing issues
with USB booting as well as etherboot.
MFC after: 2 weeks
Submitted by: kib (some parts from his original real mode patch)
- Only calculate timeshare priorities once per tick or when a thread is woken
from sleeping.
- Keep the ts_runq pointer valid after all priority changes.
- Call tdq_runq_add() directly from sched_switch() without passing in via
tdq_add(). We don't need to adjust loads or runqs anymore.
- Sort tdq and ts_sched according to utilization to improve cache behavior.
Sponsored by: Nokia
- Normalize the preemption/ipi setting code by introducing sched_shouldpreempt()
so the logical is identical and not repeated between tdq_notify() and
sched_setpreempt().
- In tdq_notify() don't set NEEDRESCHED as we may not actually own the thread lock
this could have caused us to lose td_flags settings.
- Garbage collect some tunables that are no longer relevant.
Quoth the man-page:
Fifologs provide a compact round-robin circular storage for recording
text and binary information to permanent storage in a bounded and pre-
dictable fashion, time and space wise.
Not yet connected to the build, but feel free to test & review.
the NOPs used are 0x01.
While we could simply pad with EOLs (which are 0x00), rather use an
explicit 0x00 constant there to not confuse poeple with 'EOL padding'.
Put in a comment saying just that.
Problem discussed on: src-committers with andre, silby, dwhite as
follow up to the rev. 1.161 commit of tcp_var.h.
MFC after: 11 days
- Allow realpath to accept multiple paths on the command line.
- Add -q to suppress warnings if some paths can't be processed, and use
getopt(3) to process flags.
- Print the path being requested rather than a possibly partially
processed path when a failure occurs so that you can tell which of
several passed paths did fail.
MFC after: 1 week
PR: 112920
Submitted by: Ighighi <ighighi@gmail.com>
- Add -v to print file names as they are processed; -vv prints the flags
change as well.
- Add -f to ignore failures with the same semantics as chflags(1), neither
printing an error nor affecting the return code.
- Don't try to set the flags if they won't change.
I made minor cosmetic tweaks to the code in the patch.
MFC after: 1 week
PR: 112827
Submitted by: Ighighi <ighighi at gmail.com>
the appropriate bit in the DEVACTB register.
This change allows the C2 state on those systems to work as expected.
Reviewed by: njl
Submitted by: Andriy Gapon <avg at icyb.net.ua>
MFC after: 1 week
target file after the timestamp has been set; otherwise setting the
timestamp will fail if the flags don't permit it (i.e., uchg).
MFC after: 1 week
PR: 120208
Submitted by: Ighighi <ighighi at gmail.com>
Specifically, since the delete-behind heuristic is never applied to a
device-backed object, there is no point in checking whether each of the
object's pages is fictitious. (Only device-backed objects have
fictitious pages.)
know if has siblings that need an actual probe. Introduce a specail
return value called BUS_PROBE_NOOWILDCARD. If the driver returns
this, the probe is only successful for devices that have had a
specific devclass set for them.
Reviewed by: current@, jhb@, grehan@
in*() and out*() primitives should not be used, other than by
ISA drivers. In this case they were used for memory-mapped I/O
and were not even used in the spirit of the primitives.
if netgraph reported error while delivering to destination.
Reset 'next send' counter to the last requested by peer on ack timeout
to resend all subsequest packets after lost one again without additional hints.
Solaris and AIX.
fcntl(fd, F_DUP2FD, arg) and dup2(fd, arg) are functionnaly equivalent.
Document it.
Add some regression tests (identical to the dup2(2) regression tests).
PR: 120233
Submitted by: Jukka Ukkonen
Approved by: rwaston (mentor)
MFC after: 1 month
Significant changes:
- rev. 1.11: Use PRId64 instead of a cast to long long and %lld to print
an int64_t.
- rev. 1.12: Fix a bug that humanize_number() produces "1000" where it
should be "1.0G" or "1.0M". The bug reported by Greg Troxel.
PR: 118461
PR: 102694
Approved by: rwatson (mentor)
Obtained from: NetBSD
MFC after: 1 month
HPT drivers would sometimes test the value of a preprocessor definition but
not always make sure that the definition existed in the first place, leading
to warnings on newer compilers. I blindly assumed the same with this driver,
and it turned out to be wrong and to enable some code that doesn't work.
process lock leading to a hang. This bug was introduced in
kern_sig.c:1.351, when the call to expand_name() was moved earlier
bit this particular error case was not updated.
have dependencies or need to install a new user/group, are not
problematic anymore.
PR: 121367
Submitted by: Richard Arends < richard at unixguru dot nl >
MFC after: 3 days
