The "rtentry" zone does not use UMA_ZONE_ZINIT, so it is invalid to assume the
mutex's memory will be zero. Without MTX_NEW, garbage backing memory may
trigger the "re-initializing a mutex" assertion.
PR: 200991
Submitted by: Chang-Hsien Tsai <luke.tw AT gmail.com>
This error looks like it was a simple copy-paste typo in the original commit
for this code (r275732).
PR: 204009
Reported by: Chang-Hsien Tsai <luke.tw AT gmail.com>
Sponsored by: EMC / Isilon Storage Division
VF devices use a different register layout than PF devices. Storing
the offset in a value in the softc allows code to be shared between the
PF and VF drivers.
Reviewed by: np
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D7389
In pathological situations where the master subnet manager becomes
unresponsive for an extended period, we may otherwise end up queuing all
of the system's mbufs while waiting for a response to a path record lookup.
This addresses the same issue as commit 1e85b806f9 in Linux.
Reviewed by: cem, ngie
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division
After further review of the spec, I do not think the current HotPlug
code handles slots with power controllers correctly. In particular,
the power state of the slot is to be inferred from other events, not
from examining the state of the power control bit in SLOT_CTL. For now,
disable PCI hotplug support on such slots.
PR: 211081
Tested by: Jeffrey E Pieper <jeffrey.e.pieper@intel.com>
MFC after: 3 days
All current spinning loops retry an atomic op the first chance they get,
which leads to performance degradation under load.
One classic solution to the problem consists of delaying the test to an
extent. This implementation has a trivial linear increment and a random
factor for each attempt.
For simplicity, this first thouch implementation only modifies spinning
loops where the lock owner is running. spin mutexes and thread lock were
not modified.
Current parameters are autotuned on boot based on mp_cpus.
Autotune factors are very conservative and are subject to change later.
Reviewed by: kib, jhb
Tested by: pho
MFC after: 1 week
but only in the NETMAP code. This lead to the NETMAP code paths
passing nothing up to userland.
Submitted by: Ad Schellevis <ad@opnsense.org>
Reported by: Franco Fichtner <franco@opnsense.org>
MFC after: 1 day
report the size only after first opening. And due to the events are
asynchronous, some consumers can receive this event too late and
this confuses them. This partially restores previous behaviour, and
at the same time this should fix the problem, when already opened
provider loses resize event.
PR: 211028
MFC after: 3 weeks
This addresses a regression from an earlier upstream change which caused
cma_acquire_dev() to bypass the port GID cache and instead query the HCA
for each entry in its GID table. These queries can become extremely slow on
multiport devices, which has a negative impact on connection setup times.
Discussed with: hselasky
Obtained from: Linux
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division
OpenZFS uses feature flags instead of a zpool version number to track
features since the split from Oracle. In addition to avoiding confusion
on ZFS vs OpenZFS version numbers, this also allows features to be added
to different operating systems that use OpenZFS in different order.
The previous zfs boot code (gptzfsboot) and loader (zfsloader) blindly
tries to read the pool, and if failed provided only a vague error message.
With this change, both the boot code and loader check the MOS features
list in the ZFS label and compare it against the list of features that
the loader supports. If any unsupported feature is active, the pool is
not considered as a candidate for booting, and a helpful diagnostic
message is printed to the screen. Features that are merely enabled via
zpool upgrade, but not in use, do not block booting from the pool.
Submitted by: Toomas Soome <tsoome@me.com>
Reviewed by: delphij, mav
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D6857
to r254304, we had separate functions for reclamation and laundering
(vm_pageout_scan) versus updating usage information, i.e., "reference
bits", on active pages (vm_pageout_page_stats), and we only performed
vm_req_vmdaemon(VM_SWAP_IDLE) if vm_pages_needed was true. However, since
r254303, if vm_swap_idle_enabled was "1", we have performed
vm_req_vmdaemon(VM_SWAP_IDLE) regardless of whether we are short of free
pages. This was unintended and too aggressive, so I suspect no one uses
this feature. With this change, we restore the historical behavior and
only perform vm_req_vmdaemon(VM_SWAP_IDLE) when we are short of free
pages.
Reviewed by: kib, markj
- Re-write tcp_ctlinput6() to closely mimic the IPv4 tcp_ctlinput()
- Now that tcp_ctlinput6() updates t_maxseg, we can allow ip6_output()
to send TCP packets without looking at the tcp host cache for every
single transmit.
- Make the icmp6 code mimic the IPv4 code & avoid returning
PRC_HOSTDEAD because it is so expensive.
Without these changes in place, every TCP6 pmtu discovery or host
unreachable ICMP resulted in a call to in6_pcbnotify() which walks the
tcbinfo table with the write lock held. Because the tcbinfo table is
shared between IPv4 and IPv6, this causes huge scalabilty issues on
servers with lots of (~100K) TCP connections, to the point where even
a small percent of IPv6 traffic had a disproportionate impact on
overall throughput.
Reviewed by: bz, rrs, ae (all earlier versions), lstewart (in Netflix's tree)
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D7272
Relying on the boot loader console configuration allows us to use a
common set of device hints for all SENTRY5 devices.
Approved by: adrian (mentor)
Differential Revision: https://reviews.freebsd.org/D7376
allow us to add an ACPI attachment for arm64.
Obtained from: ABT Systems Ltd
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D7307
between ACPI and FDT. This will be needed on machines with both, e.g. the
SoftIron Overdrive 3000. The kernel will accept one or more comma separated
values of either 'acpi' or 'fdt'. Any other values are skipped.
To set it the user can either set it on the loader command line, or
in loader.conf e.g. in loader.conf:
kern.cfg.order=acpi,fdt
This will try using ACPI then FDT. If none of the selected options work the
kernel tries to use one to get the serial console, then panics.
Reviewed by: emaste (earlier version)
Obtained from: ABT Systems Ltd
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D7274
lot of this module and I want to get the style and whitespace changes in
a separate commit (or maybe more).
PR: 206185
Submitted by: Dmitry Vagin
MFC after: 1 month
Just make sure that the total channel packet size does not exceed 1/2
data size of the TX bufring.
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7359
inner-shareable memory accesses. There is no need for full system barriers.
Obtained from: ABT Systems Ltd
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Both variables are uint64_t, but they only count spins or sleeps.
All reasonable values which we can get here comfortably hit in 32-bit range.
Suggested by: kib
MFC after: 1 week
The current implementation uses non-temporal writes. This turns out to
be detrimental to performance if the page is used shortly after, which
is the typical case with page faults.
Switch to rep stos.
Reviewed by: kib
MFC after: 1 week
For reasons I won't comment on, the AR934x and QCA953x GPIO_OE register
value is inverted - bit set == input, bit clear == output.
So, fix this in the output setting, in reading the initial state from
the boot loader, and also setting any gpiofunc pins that are necessary.
No, this isn't a star trek science joke - sometimes LEDs are wired
up to be active low, so this is needed.
Submitted by: Dan Nelson <dnelson_1901@yahoo.com>
* iwm_poll_bit() returns 1 on success and 0 on failure, whereas
iwl_poll_bit() in Linux's iwlwifi returns >= 0 on success and < 0 on
failure.
* Because of the wrong iwm_poll_bit return code check, no warning was
printed if tx DMA stopping failed.
Approved by: adrian (mentor)
Differential Revision: https://reviews.freebsd.org/D7371
parse() is the boot loader's interp_parse.c is too naive about quotes
both single and double quotes were allowed to be mixed, and single
quotes did not follow the usual semantics (re variable expansion).
The old code did not check for terminating quotes
This update implements:
* distinguishing single and double quote
* variable expansion will not be done inside single quote protected area
* will preserve inner quote for values like "value 'some list'"
* ending quote check.
this diff does not implement ending quote order check, it shouldn't
be too hard, needs some improvements on parser state machine.
PR: 204602
Submitted by: Toomas Soome <tsoome@me.com>
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D6000
dosfs (fat file systems) can perform reads of partial sectors
bcache should support such reads.
Submitted by: Toomas Soome <tsoome@me.com>
Reviewed by: cem
Differential Revision: https://reviews.freebsd.org/D6475
