Instead of spuriously re-reading the lock value, read it once.
This change also has a side effect of fixing a performance bug:
on failed _mtx_obtain_lock, it was possible that re-read would find
the lock is unowned, but in this case the primitive would make a trip
through turnstile code.
This is diff reduction to a variant which uses atomic_fcmpset.
Discussed with: jhb (previous version)
Tested by: pho (previous version)
It was a temporary change to ease an import of native atomic_cas primitives.
Instead, atomic_fcmpset was devised with different semantics. See r311168.
The micro-Firewall DTS is now a single BSD licensed file.
Reported by: manu
Obtained from: pfSense
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC (Netgate)
Original log:
Do not initialize the adapter on MTU change when adapter status is down.
This fixes long-standing problems when changing settings of the adapter.
Discussed in:
https://lists.freebsd.org/pipermail/freebsd-net/2016-June/045509.html
Reported by: Franco Fichtner <franco@opnsense.org>
MFH: 2 days
On systems without a configured swap device, an attempt to launder pages
from a swap object will always fail and result in the page being
reactivated. This means that the page daemon will continuously scan pages
that can never be evicted. With this change, anonymous pages are instead
moved to PQ_UNSWAPPABLE after a failed laundering attempt when no swap
devices are configured. PQ_UNSWAPPABLE is not scanned unless a swap device
is configured, so unreferenced unswappable pages are excluded from the page
daemon's workload.
Reviewed by: alc
and prison enforcement. Do it on the caller buffer directly.
Besides eliminating memory copies, this change also removes large
structure from the kernel stack.
Extracted from: ino64 work by gleb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
- iflib - add checksum in place support (mmacy)
- iflib - initialize IP for TSO (going to be needed for e1000) (mmacy)
- iflib - move isc_txrx from shared context to softc context (mmacy)
- iflib - Normalize checks in TXQ drainage. (shurd)
- iflib - Fix queue capping checks (mmacy)
- iflib - Fix invalid assert, em can need 2 sentinels (mmacy)
- iflib - let the driver determine what capabilities are set and what
tx csum flags are used (mmacy)
- add INVARIANTS debugging hooks to gtaskqueue enqueue (mmacy)
- update bnxt(4) to support the changes to iflib (shurd)
Some other various, sundry updates. Slightly more verbose changelog:
Submitted by: mmacy@nextbsd.org
Reviewed by: shurd
mFC after:
Sponsored by: LimeLight Networks and Dell EMC Isilon
Add two new qualifiers for use by the static checkers:
_Nonnull
The _Nonnull nullability qualifier indicates that null is not a meaningful
value for a value of the _Nonnull pointer type.
_Nullable
The _Nullable nullability qualifier indicates that a value of the
_Nullable pointer type can be null.
These were introduced in Clang 3.7. For more information, see:
http://clang.llvm.org/docs/AttributeReference.html#nonnull
We add these now without using them so that the GCC ports have time to
pick up the header change.
Hinted by: Android Bionic libc [1]
Also seen in: Apple's Libc-1158.20.4
[1]
baa2a973bd
(disabled by default).
To enable it, dev.rtwn.%d.radar_detection tunable need to be set
to a nonzero value.
Tested with RTL8821AU, AP mode (no radar events were seen - so,
I have no idea if it is really correct / working)
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D8903
structs under the INET6 #ifdef. Similarly (even though it doesn't seem
to affect the build), conditionalize all IPv4 structs under the INET
#ifdef
This also unbreaks the LINT-NOINET6 tinderbox target on amd64; I have not
verified other MACHINE/TARGET pairs (e.g. armv6/arm).
MFC after: 2 weeks
X-MFC with: r310847
Pointyhat to: jpaetzel
Reported by: O. Hartmann <o.hartmann@walstatt.org>
Apparently the libstand dosfs optimization is a bit too optimistic
and did introduce possible memory corruption.
This patch is backing out the bad part and since this results in
dosfs reading full blocks now, we can also remove extra offset argument
from dv_strategy callback.
The analysis of the issue and the backout patch is provided by Mikhail Kupchik.
PR: 214423
Submitted by: Mikhail Kupchik
Reported by: Mikhail Kupchik
Reviewed by: bapt, allanjude
Approved by: allanjude (mentor)
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D8644
If pager' populate method succeeded, but other thread raced with us
and modified vm_map, we must unbusy all pages busied by the pager,
before we retry the whole fault handling. If pager instantiated more
pages than fit into the current map entry, we must unbusy the pages
which are clipped.
Also do some refactoring, clarify comments and use more clear local
variable names.
Reported and tested by: kargl, subbsd@gmail.com (previous version)
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
If there is a loop in the network a CARP that is in MASTER state will see it's
own broadcasts, which will then cause it to assume BACKUP state. When it
assumes BACKUP it will stop sending advertisements. In that state it will no
longer see advertisements and will assume MASTER...
We can't catch all the cases where we are seeing our own CARP broadcast, but
we can catch the obvious case.
Submitted by: torek
Obtained from: FreeNAS
MFC after: 2 weeks
Sponsored by: iXsystems
The boot2 family of bootblocks (zfsboot/gptzfsboot) are using separate
implementation if keyboard reading code, which has deadlock case when
extended key (arrows etc) are pressed.
The problem is about avoiding the noise from some systems, generating
false key events with scan code 1 and ascii code 00, so the code
does attempt to filter such cases out. Unfortunately the extended keys
also set ascii 0, and therefore the pressed key event is ignored and
the keypress is never read, resulting in infinite loop.
This update is moving the check to keyhit() function and is allowing
the rest of the code to process the extended keys.
Reviewed by: bapt, allanjude
Approved by: allanjude (mentor)
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D8608
* Firmware oriented NICs may need to sleep in their configuration paths.
Use RLOCK instead of WLOCK to allow this to again occur.
This fixes netmap on cxgbe.
* Change the worker lock to a normal mutex rather than a spin lock.
Drivers shouldn't be doing netmap work from the fast interrupt
handlers, so it's not required to be a spinlock.
Submitted by: luigi, Vincenzo Maffione <v.maffione@gmail.com>
Reviewed by: jhb
This allows the common code to use the correct type for the lock state
local variable passed to EFSYS_LOCK() and EFSYS_UNLOCK().
On Windows, this allows warning supression pragmas to be removed.
Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
MFC after: 2 days
Wake-on-lan is not supported in production on any of our adapters, as
they don't have the required AUX power connector. (It's possible that
AUX power is supplied to some of our ALOM or mezz adapters, but if so
then we've never implemented or tested WoL support.)
Reviewed by: gnn
Sponsored by: Solarflare Communications, Inc.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D8972
The previous API had various problems, including the length of the
caller provided buffer not being specified, no means being available
to discover how big the buffer needs to be, and a lack of clarity of
what the resulting list contains.
To fix it:
- add the buffer length as a parameter
- if the provided buffer is too short, fail with ENOSPC and return the
required length
- ensure that the list contents are valid and add comments
describing it
It is safe to change this API as, unsuprisingly, it has no users.
Submitted by: Mark Spender <mspender at solarflare.com>
Reviewed by: gnn
Sponsored by: Solarflare Communications, Inc.
MFC after: 2 days
Differential Revision: https://reviews.freebsd.org/D8971
