with a general purpose front end entry point for user applications
to invoke. The MAC framework will route the system call to the
appropriate policy by name.
Obtained from: TrustedBSD Project
Sponsored by: DARPA, NAI Labs
special actions for safety. One of these is to make sure that file descriptors
0..2 are in use, by opening /dev/null for those that are not already open.
Another is to close any file descriptors 0..2 that reference procfs. However,
these checks were made out of order, so that it was still possible for a
set-user-ID or set-group-ID process to be started with some of the file
descriptors 0..2 unused.
Submitted by: Georgi Guninski <guninski@guninski.com>
is that some cards built around fm801 chip have the same device ID, only
have radio tuner onboard, but no sound capabilities. Therefore, with such
card inserted and `device pcm' in kernel the user has a big problem, as
the fm801 driver effectively hangs the machine when trying to initialise
nonexistent ac97 codecs (it does 500 retries with 1 second interval!).
It would be better if MediaForte's engeneers were smart enough to put
different device ID into such cards, but it isn't an option.
MFC after: 2 weeks
be swapped out. Do not put such the thread directly back to the run
queue.
Spotted by: David Xu <davidx@viasoft.com.cn>
While I am here, s/PS_TIMEOUT/TDF_TIMEOUT/.
vm_page_sleep_busy() with vm_page_sleep_if_busy(). At the same time,
increase the scope of the page queues lock. (This should significantly
reduce the locking overhead in vm_object_page_remove().)
o Apply some style fixes.
swapped in, we do not have to ask for the scheduler thread to do
that.
- Assert that a process is not swapped out in runq functions and
swapout().
- Introduce thread_safetoswapout() for readability.
- In swapout_procs(), perform a test that may block (check of a
thread working on its vm map) first. This lets us call swapout()
with the sched_lock held, providing a better atomicity.
conventions for _mcount and __cyg_profile_func_enter are different, so
statistical profiling kernels build and link but don't actually work.
IWBNI one could tell gcc to only generate calls to the former.
Define uintfptr_t properly for userland, but not for the kernel (I hope).
except for the fact tha they are presently swapped out. Also add a process
flag to indicate that the process has started the struggle to swap
back in. This will be needed for the case where multiple threads
start the swapin action top a collision. Also add code to stop
a process fropm being swapped out if one of the threads in this
process is actually off running on another CPU.. that might hurt...
Submitted by: Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp>
<stdint.h>. Previously, parts were defined in <machine/ansi.h> and
<machine/limits.h>. This resulted in two problems:
(1) Defining macros in <machine/ansi.h> gets in the way of that
header only defining types.
(2) Defining C99 limits in <machine/limits.h> adds pollution to
<limits.h>.
problems with the firmware and will result in a) poor performance and
b) the inability to associate certain types of cards (most notibly
cisco).
Idea obtained from OpenBSD, but I implemented it by clearing the
IFF_PROMISC flag rather than the refusing to honor it downstream.
1.131 is slightly broken, and I would commit the fix to that here, but it
has been reported that any deviation from the original code is causing
problems with some 82557 chips, causing them to lock hard.
Until those issues have been figured out, going back to the original
code is the best plan.
Frustrated: Silby
so that the data is less likely to be inconsistent if SYSCTL_OUT() blocks.
If the data is large, wire the output buffer instead.
This is somewhat less than optimal, since the handler could skip the copy
if it knew that the data was static.
If the data is dynamic, we are still not guaranteed to get a consistent
copy since another processor could change the data while the copy is in
progress because the data is not locked. This problem could be solved if
the generic handlers had the ability to grab the proper lock before the
copy and release it afterwards.
This may duplicate work done in other sysctl handlers in the kernel which
also copy the data, possibly while a lock is held, before calling they call
a generic handler to output the data. These handlers should probably call
SYSCTL_OUT() directly.
SYSCTL_OUT() from blocking while locks are held. This should
only be done when it would be inconvenient to make a temporary copy of
the data and defer calling SYSCTL_OUT() until after the locks are
released.
