Implement the protection check required by the pmap_extract_and_hold()
specification.
Remove the acquisition and release of Giant from pmap_extract_and_hold() and
pmap_protect().
Many thanks to Ken Smith for resolving a sparc64-specific initialization
problem in my original patch.
Tested by: kensmith@
bio_driver1 (as all the rest).
This introduced a small memory leak, but it wasn't really critical,
because maximum memory for g_stripe_zone is always set, so after few
requests gstripe was working in "economic" mode.
are resevered, they can be written with anything, but they always read
as zero, we should simulate it in set_regs() as we are reading/writting
real hardware %rflags register.
contributed to the transferable load count. This prevents any potential
problems with sched_pin() being used around calls to setrunqueue().
- Change the sched_add() load balancing algorithm to try to migrate on
wakeup. This attempts to place threads that communicate with each other
on the same CPU.
- Don't clear the idle counts in kseq_transfer(), let the cpus do that when
they call sched_add() from kseq_assign().
- Correct a few out of date comments.
- Make sure the ke_cpu field is correct when we preempt.
- Call kseq_assign() from sched_clock() to catch any assignments that were
done without IPI. Presently all assignments are done with an IPI, but I'm
trying a patch that limits that.
- Don't migrate a thread if it is still runnable in sched_add(). Previously,
this could only happen for KSE threads, but due to changes to
sched_switch() all threads went through this path.
- Remove some code that was added with preemption but is not necessary.
umich copyright is asserting.
Clarify that the copyright I'm asserting is the standard Berkeley
license.
Remove Giant assertions from AARP and DDP input routines.
is here so that we can gather stats on the nature of the recent rash of
hard lockups, and in this particular case panic the machine instead of
letting it deadlock forever.
becauses some syscalls using set_mcontext can sneakily change
parameters and later when those syscalls references parameters,
they will wrongly use register values in mcontext_t.
Approved by: peter
chipsets, based on Linux's via-agp.c. On boot, the system selects which AGP
version to use based on the inserted card. If v2 was chosen, the chipset
needs to be programmed with the v2 registers still. Also included in kern/69953
are changes to make the programming of the v3 registers match linux, but that
will be left out until the need to do so is confirmed (want specs or a tester).
PR: kern/69953
Submitted by: Oleg Sharoiko <os@rsu.ru>
Tested by: Oleg Sharoiko <os@rsu.ru>, Geoff Speicher <geoff@speicher.org>
(full version from PR)
The hardware always gives read access for privilege level 0, which
means that we cannot use the hardware access rights and privilege
level in the PTE to test whether there's a change in protection. So,
we save the original vm_prot_t in the PTE as well.
Add pmap_pte_prot() to set the proper access rights and privilege
level on the PTE given a pmap and the requested protection.
The above allows us to compare the protection in pmap_extract_and_hold()
which was missing. While in pmap_extract_and_hold(), add pmap locking.
While here, clean up most (i.e. all but one) PTE macros we inherited
from alpha. They were either unused, used inconsistently, badly named
or simply weren't beneficial. We save the wired and managed state of
the PTE in distinct (bit) fields.
While in pte.h, s/u_int64_t/uint64_t/g
pmap locking obtained from: alc@
feedback & review by: alc@
* Allow no-fault wiring/unwiring to succeed for consistency;
however, the wired count remains at zero, so it's a special case.
* Fix issues inside vm_map_wire() and vm_map_unwire() where the
exact state of user wiring (one or zero) and system wiring
(zero or more) could be confused; for example, system unwiring
could succeed in removing a user wire, instead of being an
error.
* Require all mappings to be unwired before they are deleted.
When VM space is still wired upon deletion, it will be waited
upon for the following unwire. This makes vslock(9) work
rather than allowing kernel-locked memory to be deleted
out from underneath of its consumer as it would before.
1. Move a comment to its proper place, updating it. (Except for white-
space, this comment had been unchanged since revision 1.1!)
2. Remove spl calls.
fix the obvious bugs, nastier ones reside below the surfac), and having
it commented out here just encourages people to try it.
# I'm not removing it from the base system, yet.
For incoming packets, the packet's source address is checked if it
belongs to a directly connected network. If the network is directly
connected, then the interface the packet came on in is compared to
the interface the network is connected to. When incoming interface
and directly connected interface are not the same, the packet does
not match.
Usage example:
ipfw add deny ip from any to any not antispoof in
Manpage education by: ru
It allows to fix problems when last provider's sector is shared between few
providers.
- Bump version number for CONCAT and STRIPE and add code for backward
compatibility.
- Do not bump version number of MIRROR, as it wasn't officially introduced yet.
Even if someone started to play with it, there is no big deal, because
wrong MD5 sum of metadata will deny those providers.
- Update manual pages.
- Add version history to g_(stripe|concat).h files.
thread, after the bound thread leaves critical region, the thread should
check debug flag may suspend itself by using the command.
2.Schedule upcall after thread is suspended by debugger
3.Wakeup upcall thread after process suspension.
Reviewed by: deischen
