shm syscalls, and initial check for the number of allocated segments
in the module deinitialization code, the following might happen:
after the check for active segment, while waiting for threads to
leave some other syscall, shmget(2) is called. Then, we can end
up with the shared segment that cannot be detached since sysvshm
module is unloaded.
Prevent the leak by rechecking and disclaiming a reference to the vm
object owned by sysvshm module, that might have grown during the drain.
Tested by: pho
Reviewed by: jhb
MFC after: 1 month
syscalls. On the dynamic syscall deregistration, wait until all
threads leave the syscall code. This somewhat increases the safety
of the loadable modules unloading.
Reviewed by: jhb
Tested by: pho
MFC after: 1 month
not providing a destination address and using ktrace.
* Do not copy out kernel memory when providing sinfo for sctp_recvmsg().
Both bug where reported by Valentin Nechayev.
The first bug results in a kernel panic.
MFC after: 3 days.
It has more features than acpi_aiboost(4) and it will eventually replace
acpi_aiboost(4).
Submitted by: Constantine A. Murenin <cnst at FreeBSD.org>
Reviewed by: freebsd-acpi, imp
MFC after: 1 month
Initial support for n32 and n64 ABIs from
http://svn.freebsd.org/base/user/jmallett/octeon
Changes are:
- syscall, exception and trap support for n32/n64 ABIs
- 64-bit address space defines
- _jmp_buf for n32/n64
- casts between registers and ptr/int updated to work on n32/n64
Approved by: rrs(mentor), jmallett
the internal interrupt sources as active-high. The internal interrupt
sources are disabled when programmed as active-low.
Note that the internal interrupts have no sense bit like the external
interrupts. We program them as edge-triggered to make sure we write a
0 value to a reserved register. It does not in any way say anything
about the sense of internal interrupt.
CPUs by default, and provide a functional version of BUS_BIND_INTR().
While here, fix some potential concurrency problems in the interrupt
handling code.
ABI specifies the DF should be zero, and newer compilers do not clear
DF before using DF-sensitive instructions.
The DF clearing for signal handlers was done some time ago.
MFC after: 1 week
PTE flag cleanup from http://svn.freebsd.org/base/user/jmallett/octeon
- Rename PTE_xx flags to match their MIPS names
- Use the new pte_set/test/clear macros uniformly, instead of a mixture
of mips_pg_xxx(), pmap_pte_x() macros and direct access.
- Remove unused macros and defines from pte.h and pmap.c
Discussed on freebsd-mips@
Approved by: rrs(mentor), jmallett
wrong side into account.
* sctp_findassociation_ep_addr() must check the local address if available.
This fixes a bug where ABORT chunks were accepted even in the case where
the local was not owned by the endpoint.
Thanks to brucec for pointing out a bug in my first version of the fix.
MFC after: 3 days
get_fpcontext(), and npxsetuserregs() for set_fpcontext). Also,
note that usercontext is not initialized anymore in fpstate_drop().
Systematically replace references to npxgetregs() and npxsetregs()
by npxgetuserregs() and npxsetuserregs() in comments.
Noted by: bde
removal, MFi386 r209198:
Use critical sections instead of disabling local interrupts to ensure
the consistency between PCPU fpcurthread and the state of FPU.
Reviewed by: bde
Tested by: pho
believed that all 486-class CPUs FreeBSD is capable to run on, either
have no FPU and cannot use external coprocessor, or have FPU on the
package and can use #MF.
Reviewed by: bde
Tested by: pho (previous version)
FPU registers for copying. Remove the switch table and jumps from
bcopy/bzero/... to the actual implementation.
As a side-effect, i486-optimized bzero is removed.
Reviewed by: bde
Tested by: pho (previous version)
properly short terminate their transfers. This fixes a problem where input
appears several seconds late.
Reported by: Alexander Yerenkow
Submitted by: Hans Petter Selasky
HPET to steal IRQ0 from i8254 and IRQ8 from RTC timers. It can be suitable
for HPETs without FSB interrupts support, as it gives them two unshared
IRQs. It allows them to provide one per-CPU event timer on dual-CPU system,
that should be suitable for further tickless kernels.
To enable it, such lines may be added to /boot/loader.conf:
hint.atrtc.0.clock=0
hint.attimer.0.clock=0
hint.hpet.0.legacy_route=1
vm_pageout_clean(). When iterating over a range of pages, these functions
can be cheaper than vm_page_lookup() because their implementation takes
advantage of the vm_object's memq being ordered.
Reviewed by: kib@
MFC after: 3 weeks
