If we save/restore the PageMask, the value set by the bootloader will
persist, and will cause problems later in TLB exception handler.
This caused a crash in AR71xx boards.
Also fixes the EntryHi mask in pte.h
Reported by: Luiz Otavio O Souza <lists.br@gmail.com>
Tested by: Luiz Otavio O Souza <lists.br@gmail.com>
Approved by: rrs (mentor)
a read-lock is being called to check the vtag-timewait cache.
Then in two cases (where a vtag is bad i.e. in the time-wait
state) the write-unlock is called NOT the read-unlock. Under
conditions where lots of associations are coming and going
this will cause the system to panic at some point.
MFC after: 3 days
the core changes but left out the shared code, lol.
Well, and a couple fixes to the core... hopefully
this will all be complete now.
Happy happy joy joy :)
What this provides is support for the 'virtual function'
interface that a FreeBSD VM may be assigned from a host
like KVM on Linux, or newer versions of Xen with such
support.
When the guest is set up with the capability, a special
limited function 82576 PCI device is present in its virtual
PCI space, so with this driver installed in the guest that
device will be detected and function nearly like the bare
metal, as it were.
The interface is only allowed a single queue in this configuration
however initial performance tests have looked very good.
Enjoy!!
Previously, the caller unlocked the page, and vm_pageout_clean()
immediately reacquired the page lock. Also, assert rather than test
that the page is neither busy nor held. Since vm_pageout_clean() is
called with the object and page locked, the page can't have changed
state since the caller verified that the page is neither busy nor
held.
one or more mappings to the bogus page must be replaced, call pmap_qenter()
just once. Previously, pmap_qenter() was called for each mapping to the
bogus page.
MFC after: 3 weeks
limit the advertised speed of an SFP+ to 1G, effectively
"forcing" link at that lower speed. It is off by default
and is enabled by sysctl dev.ix.0.force_gig=1, 0 will
set it back to the norm.
The mpt driver previously didn't report a 'maxio' size to CAM, and so the
da(4) driver limited I/O sizes to DFLTPHYS (64K) by default. The number
of scatter gather segments allowed, as reported to busdma, was
(128K / PAGE_SIZE) + 1, or 33 on architectures with 4K pages.
Change things around so that we wait until we've determined how many
segments the adapter can support before creating the busdma tag used for
buffers, so we can potentially support more S/G segments and therefore
larger I/O sizes.
Also, fix some things that were broken about the module unload path. It
still gets hung up inside CAM, though.
mpt.c: Move some busdma initialization calls in here, and call
them just after we've gotten the IOCFacts, and know how
many S/G segments this adapter can support.
mpt.h: Get rid of MPT_MAXPHYS, it is no longer used.
Add max_cam_seg_cnt, which is used to report our maximum
I/O size up to CAM.
mpt_cam.c: Use max_cam_seg_cnt to report our maximum I/O size to CAM.
Fix the locking in mpt_cam_detach().
mpt_pci.c: Pull some busdma initialization and teardown out and put
it in mpt.c. We now delay it until we know many scatter
gather segments the adapter can support, and therefore
how to setup our busdma tags.
mpt_raid.c: Make sure we wake up the right wait channel to get the
raid thread to wake up when we're trying to shut it down.
Reviewed by: gibbs, mjacob
MFC after: 2 weeks
This prevents a kernel fault by dividing with zero because the initial
rate was 0 and didn't be initialized.
Tested by: Warren Block <wblock at wonkity.com>
MFC after: 3 days
changed to RUN because ic->ic_newassoc isn't set anywhere now. In the
previous bwi_newassoc() is used to initialize AMRR rate routines.
Tested by: Warren Block <wblock at wonkity.com>
MFC after: 3 days
- Rename tdsignal() to tdsendsignal() and make it private to kern_sig.c.
- Add tdsignal() and tdksignal() routines that mirror psignal() and
pksignal() except that they accept a thread as an argument instead of
a process. They send a signal to a specific thread rather than to an
individual process.
Reviewed by: kib
"match" processing at the end of inner loop would look ahead into the next
rule, which is incorrect. Particularly, in the case when the next rule
started with F_NOT opcode it was skipped blindly.
To fix this, exit the inner loop with the continue operator forcibly and
explicitly.
PR: kern/147798
Use C99 initializers for the struct sysent generated by MAKE_SYSENT().
C++ does not have designator-initializer facility of C99, not using this
in the header makes us friendly to C++ kernel modules, whoever wants
such schism.
Requested by: mdf
MFC after: 6 days (not really)
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.
