in "missing dependencies" error when loading some kld modules. It is sad to
see how often these days style cleanus break doesn't broken things. Perhaps
people should recall good old principle: "don't fix it if it isn't broken".
fully instaniated.
Revert the logic in pipeclose so that we don't have the entire function
pretty much under a single if() statement, instead invert the test and
just return if it fails.
Submitted (in different form) by: bde
Don't use pool mutexes for pipes. We can not use pool mutexes
because we will need to grab the select lock while holding a pipe
lock which is not allowed because you may not aquire additional
mutexes when holding a pool mutex.
Instead malloc(9) space for the mutex that is shared between the
pipes.
simply need to prevent switching from another CPU and do not need
interrupts disabled.
- Add a comment to witness_list() about why displaying spin locks for
threads on other CPU's really is just a bad idea and probably shouldn't
be done.
to exhaust all kmaps. The only reward for setting maxproc
to a value which will cause kmap exhaustion is a panic
during a forkbomb attack.
MFC after: 3 days
- Move jail checks and some other checks involving constants and stack
variables out from under Giant. This isn't perfectly safe atm because
jail_sysvipc_allowed is read w/o a lock meaning that its value could be
stale. This global variable will soon become a per-jail flag, however,
at which time it will either not need a lock or will use the prison lock.
people working on the MAC tree from getting toasted whenever system call
numbers are allocated in the main tree (for example, for KSE :-).
Calls allocated: __mac_{get,set}_proc, __mac_{get,set}_{fd,file}().
Obtained from: TrustedBSD Project
Sponsored by: DARPA, NAI Labs
Includes some minor whitespace changes, and re-ordering to be able to document
properly (e.g, grouping of variables and the SYSCTL macro calls for them, where
the documentation has been added.)
Reviewed by: phk (but all errors are mine)
be allocated as arrays indexed by the cpu id. Previously the only reliable
way to know the max cpu id was through MAXCPU. mp_ncpus isn't useful here
because cpu ids may be sparsely mapped, although x86 and alpha do not do this.
Also, call cpu_mp_probe much earlier so the max cpu id is known before the VM
starts up. This is intended to help support per cpu queues for the new
allocator, but may be useful elsewhere.
Reviewed by: jake
Approved by: jake
This makes other power-management system (APM for now) to be able to
generate power profile change events (ie. AC-line status changes), and
other kernel components, not only the ACPI components, can be notified
the events.
- move subroutines in acpi_powerprofile.c (removed) to kern/subr_power.c
- call power_profile_set_state() also from APM driver when AC-line
status changes
- add call-back function for Crusoe LongRun controlling on power
profile changes for a example
PAGE_SIZE / MCLBYTES == 1 crash. Fix them by changing the
appropriate "allocate new page and bucket" code in mb_alloc to use
the macro for properly grabbing an allocated object from a bucket,
the one that checks whether the bucket is empty.
This should allow ken to continue testing zero-copy stuff on -CURRENT.
Noticed and provided debug info: ken
fill out netc_anon (a `struct ucred'), and add an XXX around the
entire operation since it isn't clear whether it's doing the right
thing with things like cr_uidinfo and cr_prison.
the data was supplied as a uio or an mbuf. Previously the limit was
ignored for mbuf data, and NFS could run the kernel out of mbufs
when an ipfw rule blocked retransmissions.
the pipe is locked and shouldn't be.
initialize pipe->pipe_mtxp to NULL when creating pipes in order not
to trip the above assertions.
swap pipe lock with giant around calls to pipe_destroy_write_buffer()
pipe_destroy_write_buffer issue noticed by: jhb
fully protect p_ucred yet so Giant is needed until all the p_ucred
locking is done. This is the original reason td_ucred was not used
immediately after its addition. Unfortunately, not using td_ucred is
not enough to avoid problems. Since p_ucred could be stale, we could
actually be dereferencing a stale pointer to dink with the refcount, so
we really need Giant to avoid foot-shooting. This allows td_ucred to
be safely used as well.
as arguments. The correct hostname is copied into the buffer
while having the prison's lock acquired in a jailed process'
case.
Reviewed by: jhb, rwatson
There is some unresolved badness that has been eluding me, particularly
affecting uniprocessor kernels. Turning off PG_G helped (which is a bad
sign) but didn't solve it entirely. Userland programs still crashed.
