before PG_M. This sometimes prevents unnecessary removal of write access
from a PTE. Overall, the net result is fewer demotions and promotion
failures.
- Add a mutex to the softc to protect the softc and device hardware.
- Use a private watchdog timer.
- Setup interrupt handler after ether_ifattach().
- Use bus_foo() rather than bus_space_foo() and remove bus space tag and
handle from softc.
Tested by: imp
The -l option changes the output to show the partition label, if applicable
and when present. The -r option changes the output to show the raw (i.e.
scheme-specific) partition types.
SO_LISTENQLEN SO_LISTENINCQLEN to the manual page.
Till now those were only present in sys/socket.h file.
Reviewed by: rwatson, gnn, keramida (with mdoc hat)
- updating: terminating '\n' is not part of the package origin.
- bump PKG_INSTALL_VERSION to 20080612.
PR: bin/119368 [1], bin/124459 [2]
Submitted by: gcooper [1], Beat Gatzi <beat@chruetertee.ch> [2]
MFC after: 3 days
Even though I ran a `make universe' to see whether the changes to the
device minor number macro's broke the build, I was not expecting `make
universe' to silently continue if build errors occured, thus causing me
to overlook the build error.
Approved by: philip (mentor)
Pointyhat to: me
Now that we got rid of the minor-to-unit conversion and the constraints
on device minor numbers, we can convert the functions that operate on
minor and unit numbers to simple macro's. The unit2minor() and
minor2unit() macro's are now no-ops.
The ZFS code als defined a macro named `minor'. Change the ZFS code to
use umajor() and uminor() here, as it is the correct approach to do
this. Also add $FreeBSD$ to keep SVN happy.
Approved by: philip (mentor), pjd
page table page. The direction of the traversal can matter if
pmap_promote_pde() has to remove write access (PG_RW) from a PTE that hasn't
been modified (PG_M). In general, if there are two or more such PTEs to
choose among, it is better to write protect the one nearer the high end of
the page table page rather than the low end. This is because most programs
access memory in an ascending direction. The net result of this change is a
sometimes significant reduction in the number of failed promotion attempts
and the number of pages that are write protected by pmap_promote_pde().
Except for the case where we use the cloner library (clone_create() and
friends), there is no reason to enforce a unique device minor number
policy. There are various drivers in the source tree that allocate unr
pools and such to provide minor numbers, without using them themselves.
Because we still need to support unique device minor numbers for the
cloner library, introduce a new flag called D_NEEDMINOR. All cdevsw's
that are used in combination with the cloner library should be marked
with this flag to make the cloning work.
This means drivers can now freely use si_drv0 to store their own flags
and state, making it effectively the same as si_drv1 and si_drv2. We
still keep the minor() and dev2unit() routines around to make drivers
happy.
The NTFS code also used the minor number in its hash table. We should
not do this anymore. If the si_drv0 field would be changed, it would no
longer end up in the same list.
Approved by: philip (mentor)
mtx interface for NDIS_LOCK/UNLOCK. This should result in less
CPU utilization on behalf of the ndis driver. Additionally, this
commit also fixes a potential LOR in the ndis_tick code, by
not locking inside the ndis_tick function, but instead delegating
that work to the helpers called through IoQueueWorkItem. The
way that this is currently set up for NDIS prevents us from
simply implementing a callout_init_mtx mechanism.
However, the helper functions that handle the various timeout
cases implement fine-grained locking using the spinlocks provided
by the NDIS-compat layer, and using the mtx that is added with
this commit. This leaves the following ndis_softc members operated
on in ndis_tick in an unlocked context:
* ndis_hang_timer - Only modified outside of ndis_tick once, before
the first callout_reset to schedule ndis_tick
* ifp->if_oerrors - Only incremented in two places, which should be
an atomic op
* ndis_tx_timer - Assigned to 5 (when guaranteed to be 0) or 0
(in txeof), to indicate to ndis_tick what to
do. This is the only member of which I was
suspicious for needing the NDIS_LOCK here. My
testing (and another's) have been fine so far.
* ndis_stat_callout - Only uses a simple set of callout routines,
callout_reset only called by ndis_tick after
the initial reset, and then callout_drain is
used exactly once in shutdown code.
The benefit is that ndis_tick doesn't acquire NDIS_LOCK unless one of
the timeout conditions is flagged, and it still obeys the locking
order semantics that are dictated by the NDIS layer at the moment. I
have been investigating a more thorough s/spinlock/mtx/ of the NDIS
layer, but the simplest naive approach (replace KeAcquireSpinLock
with an mtx implementation) has anti-succeeded for me so far. This
is a good first step though.
Tested by: onemda@gmail.com
Reviewed by: current@, jhb, thompsa
Proposed by: jhb
The while loop that is assumed to initialize the uio_off later, may
be not entered at all, causing uninitialized value to be returned in
uio->uio_offset.
PR: 122925
Submitted by: Jaakko Heinonen <jh saunalahti fi>
MFC after: 1 weeks
We still use the interrupt filter due to performance problems that show up if
we don't. The main problem seen is that, due to the interrupt being edge
triggered, we occasionally miss interrupts which leads us to not notice that
we can transmit more packets. Using the new approach, which just schedules
a task on a taskqueue, we are guaranteed to have the task run even if the
interrupt arrived while we were already executing. If we were to use an
ithread the system would mask the interrupt while the handler is run and we'd
miss interrupts.
allocated semaphores, so it's wrong to increase it conditionally,
in this case for every over-the-limit semaphore nsegs is decreased
without being previously increased.
PR: kern/123685
Approved by: cognet (mentor)
