During the life of a process, new file descriptor tables may be allocated. When
a new table is allocated, the old table is placed in a free list and held onto
until all processes referencing them exit.
When a new file descriptor table is allocated, the old file descriptor table
can be freed when the current process has a single-thread and the file
descriptor table is not being shared with any other processes.
Reviewed by: kevans
Approved by: kevans (mentor)
Differential Revision: https://reviews.freebsd.org/D18617
- Allocate 256 handlers more than payload commands for management purposes.
- Increase maximum number of handlers from 8K to 16K by tuning the format.
- Just to be safe limit the number of payload commands to 16K - 256.
- Limit number of target exchanges in mixed mode to the number of atpds.
- If we still somehow get out of atpds -- return BUSY, since we really are.
There is not much to inherit any more, may create more problems than solve.
Instead parent them all directly to upstream.
While there, add missed payload tag and tune scratch tag destructions.
While there, do some minor cleanup for kclocks. They are only
registered from kern_time.c, make registration function static.
Remove event hooks, they are not used by both registered kclocks.
Add some consts.
Perhaps we can stop registering kclocks at all and statically
initialize them.
Reviewed by: mjg
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D27305
There is no point in dynamic registration, umtx hook is there always.
Reviewed by: mjg
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D27303
The netmap application using the driver is responsible for replenishing
the receive freelists and they may be totally depleted when the
application exits. Packets in flight, if any, might block the pipeline
in case there aren't enough buffers left in the freelist. Avoid this by
filling up the freelists with a driver allocated buffer.
MFC after: 1 week
Sponsored by: Chelsio Communications
Qlogic chips store S/G lists in the same queue as requests themselves. In
the worst case 1MB I/O may require up to 52 IOCBs, that means queue of 1024
IOCBs can store only 19 of such requests. The increase reduces chances of
overflow, while we should be able to afford additional 512KB of RAM per HBA.
The Linux driver uses comparable numbers.
While there, decouple ATIO queue size from response queue size. There is
no reason for them to be equal.
- Make isp_start() to set all the IOCB fields aside of S/G list, removing
extra information from isp_send_cmd(), now only doing S/G lists and sending.
- Turn DMA setup/free from being card and PCI-specific into OS-specific,
instead add new card-specific method for isp_send_cmd(). Previously this
function was a monster handling all the cards.
- Remove double error code translation.
Ensure we initialize the static environment when not booting via
loader(8), and provide a static buffer if this is the case. This fixes
two issues.
First, performing the initialization ensures that kenv variables set in
the kernel's config file are honored. Previously, any new or overridden
values were ignored.
Second, providing the static buffer allows variables to be set in the
device tree's bootargs property of the chosen node. This can be set by
u-boot or by QEMU's '-append' flag. Attempting to this prior to this
change resulted in an early panic, since the static environment had no
buffer backing it.
Submitted by: syrinx (earlier version)
Reviewed by: kp
Differential Revision: https://reviews.freebsd.org/D25034
This also eliminates unsafe use of VFS_SYNC(MNT_WAIT).
Requested by: mckusick
Discussed with: imp
Tested by: pho (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D27269
Don't use "new" as an identifier, and add explicit casts from void *.
As a general policy, FreeBSD doesn't make any C++ compatibility
guarantees for kernel headers like it does for userland, but it is a
small effort to do so in this case, to the benefit of a downstream
consumer (NetApp).
Reviewed by: rscheff
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D27286
with to == NULL for SYN segments. So don't assume tp != NULL.
Thanks to jhb@ for reporting and suggesting a fix.
PR: 250499
MFC after: 1 week
XMFC-with: r367530
Sponsored by: Netflix, Inc.
We never set PFRULE_RULESRCTRACK when calling pf_insert_src_node(). We do set
PFRULE_SRCTRACK, so update the assertion to match.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D27254
There are message based controllers that can bind interrupts even if they are
not implemented as root controllers (such as the ITS subblock of GIC).
MFC after: 3 weeks
This removes 288KB (36%) of the driver code and zillions of hacks and
workarounds, making single driver uniformly support several different
generations of hardware interfaces, not counting minor card variations.
After years of the hopeless fight, I don't think it worth to continue
support for hardware obsolete for 15-20 years. Instead much cleaner
now code should allow to move forward toward better locking, multiple
queues and other cool features.
All the remaining Qlogic cards starting from 4Gb 24xx to 32Gb 27xx use
the same hardware/firmware interface with minor incremental improvements,
so it seems to be a good new starting point. Except one PCI-X model all
all of them are PCIe and so still usable in modern systems.
Discussed with: ken, scottl, jpaetzel, imp
Relnotes: yes
Rudimentary AUX multiplexing support was added to kernel to make possible
touchpad initialization on some HP EliteBook laptops with trackpoint.
Disable multiplexer probing on all Lenovo laptops now as they use touchpad
pass-through port rather than AUX multiplexer to connect trackpoint and
at least two model (X120e and X121e) is known for getting PS/2 AUX port
dysfunctional after switching back to hidden multiplexing mode.
AUX MUX probing can be reenabled with setting of hw.psm.mux_disabled loader
tunable to 0.
PR: 249987
Reported by: jwb
MFC after: 2 weeks
All reads and writes are serialized with a hand-rolled lock, but unlocking it
always wakes up all waiters. Existing flag fields get resized to make room for
introduction of waiter counter without growing the struct.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D27273
Suppose a running callout re-arms itself, and before the callout
finishes running another CPU calls callout_drain() and goes to sleep.
softclock_call_cc() will wake up the draining thread, which may not run
immediately if there is a lot of CPU load. Furthermore, the callout is
still in the callout wheel so it can continue to run and re-arm itself.
Then, suppose that the callout migrates to another CPU before the
draining thread gets a chance to run. The draining thread is in this
loop in _callout_stop_safe():
while (cc_exec_curr(cc) == c) {
CC_UNLOCK(cc);
sleep();
CC_LOCK(cc);
}
but after the migration, cc points to the wrong CPU's callout state.
Then the draining thread goes off and removes the callout from the
wheel, but does so using the wrong lock and per-CPU callout state.
Fix the problem by doing a re-lookup of the callout CPU after sleeping.
Reported by: syzbot+79569cd4d76636b2cc1c@syzkaller.appspotmail.com
Reported by: syzbot+1b27e0237aa22d8adffa@syzkaller.appspotmail.com
Reported by: syzbot+e21aa5b85a9aff90ef3e@syzkaller.appspotmail.com
Reviewed by: emaste, hselasky
Tested by: pho
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D27266
There are many cases where one would choose avoid entering the debugger
on a normal panic, opting instead to reboot and possibly save a kernel
dump. However, recursive kernel panics are an unusual case that might
warrant attention from a human, so provide a secondary tunable,
debug.debugger_on_recursive_panic, to allow entering the debugger only
when this occurs.
For for simplicity in maintaining existing behaviour, the tunable
defaults to zero.
Reviewed by: cem, markj
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D27271
The current global list is a significant problem, in particular induces a lot
of cross-domain thread frees. When running poudriere on a 2 domain box about
half of all frees were of that nature.
Patch below introduces per-domain thread data containing zombie lists and
domain-aware reaping. By default it only reaps from the current domain, only
reaping from others if there is free TID shortage.
A dedicated callout is introduced to reap lingering threads if there happens
to be no activity.
Reviewed by: kib, markj
Differential Revision: https://reviews.freebsd.org/D27185
When there is no ACPI redistributor sub-table in the MADT we need to
fall back to use the GICR base address from the GIC CPU interface
structure.
Handle this fallback when adding memory to the device and when counting
the number of redistributors.
PR: 251171
Reported by: Andrey Fesenko <f0andrey_gmail.com>
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D27247
