This splits the ncneg_mtx lock while preserving the hit ratio at least
during buildworld.
Create N dedicated lists for new negative entries.
Entries with at least one hit get promoted to the hot list, where they
get requeued every M hits.
Shrinking demotes one hot entry and performs a round-robin shrinking of
regular lists.
Reviewed by: kib
host-programmed DMA regions. This change seemingly fixes the
descriptor fetches, but the packet memory accesses are left
problematic.
Reviewed by: emaste, erj, sbruno
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D8282
The cornercase is when printenv is passed a parameter in the form VAR=val,
where VAR=val exists in the environment. In this case, printenv would print a
spurious newline and returns 0.
Approved by: cognet
MFC after: 1 week
prominently. Unlike in the past (dating back to the 4.x branch point),
you cannot upgrade from any point on the past couple of stable
branches to -current. Due to a bug in clang that existed before
r286035 in stable/9 or r286033 in stable/10, we cannot compile llvm
that's in 11.x or -current. Unfortunately, these revisions are after
9.3R and 10.3R on their respective branches. stable/11 and 11.0R are
not affected.
This also affects the upgrade path to 11 (including 11.0R) from
stable/9 and stable/10 (which would otherwise work, were it not for
this bug).
We also need to amend the 11.0R release notes.
MFC After: 3 days
See the comments for more detailed description of the algorithm.
The pager is used unconditionally when the block size of the
underlying device is larger than the machine page size, since local
vnode pager cannot handle the configuration [1]. Otherwise, the
vfs.ffs.use_buf_pager sysctl allows to switch to the local pager.
Measurements demonstrated no regression in the ever-important
buildworld benchmark, and small (~5%) throughput improvements in the
special microbenchmark configuration for dbench over swap-backed
md(4).
Code can be generalized and reused for other filesystems which use
buffer cache.
Reported by: Anton Yuzhaninov <citrin@citrin.ru> [1]
Tested by: pho
Benchmarked by: mjg, pho
Reviewed by: alc, markj, mckusick (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D8198
This is a very simple addition to the net80211 scan support.
It doesn't implement a replacement scan interface - it just disables
the pieces that we should disable to make this lifecycle a bit
more managable.
There's more work to come before full scan offload support is available
but it should be good enough for driver work.
* add a flag to say "full offload"
* don't do probe requests when scanning full-offload - firmware can do that
* don't do powersave transitions and buffering - firmware can do that
tested:
* iwm(4) - STA mode
* ath10k port (local, not in freebsd-head yet)
Reviewed by: avos
Differential Revision: https://reviews.freebsd.org/D8262
Static variables aren't MP-safe, and this was causing bizarre segfaults on a
dual-core e500v2 system (P1022).
Still left is one static variable, which should be moved into the pcb instead,
but as illegal instructions haven't been hit yet, it's lower priority.
MFC after: 1 week
Policy for FreeBSD/arm64 kernel config is the same one as for x86
architectures: provide GENERIC kernel bootable on as many systems
as possible. Since there is no SMP support for RPi 3 yet new kernel
config was introduced: GENERIC-UP, which is effectively GENERIC with
SMP option disabled
C99 allows array function parameters to use the static keyword for their
sizes. This tells the compiler that the parameter will have at least the
specified size, and calling code will fail to compile if that guarantee is
not met. However, this syntax is not legal in C++.
This commit reverts r300824, which worked around the problem for
sys/sys/md5.h only, and introduces a new macro: min_size(). min_size(x) can
be used in headers as a static array size, but will still compile in C++
mode.
Reviewed by: cem, ed
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D8277
fastpath and slowpath taskqueues.
2. Service all transmits in taskqueue threads.
3. additional stats counters for keeping track of
- bd availability
- tx buf ring not emptied in the fp task queue.
These are drained via timeout taskqueue.
- tx attempts during link down.
MFC after: 5 days
fix build on 32 bit platforms
simplify logic in netmap_virt.h
The commands (in net/netmap.h) to configure communication with the
hypervisor may be revised soon.
At the moment they are unused so this will not be a change of API.
ref: 535865d02c
Fix cpu assignment by assuring stride is non-zero, assert that all tasks
have a valid taskqueue.
ref: db39817623
Start cpu assignment from zero.
ref: d99d39b6b6
Submitted by: mmacy@nextbsd.org
not be sent to userspace, for example the future flag to tell when we are
using floating point in the kernel.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
but fstyp cannot detect EL filesystem on EB machine,
so exclude test files from distribution and skip the
test.
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
after having been dropped.
This fixes enforces in_pcbdrop() logic in tcp_input():
"in_pcbdrop() is used by TCP to mark an inpcb as unused and avoid future packet
delivery or event notification when a socket remains open but TCP has closed."
PR: 203175
Reported by: Palle Girgensohn, Slawa Olhovchenkov
Tested by: Slawa Olhovchenkov
Reviewed by: Slawa Olhovchenkov
Approved by: gnn, Slawa Olhovchenkov
Differential Revision: https://reviews.freebsd.org/D8211
MFC after: 1 week
Sponsored by: Verisign, inc
