On exec, single-threading must be enforced before arguments space is
allocated from exec_map. If many threads try to perform execve(2) in
parallel, the exec map is exhausted and some threads sleep
uninterruptible waiting for the map space. Then, the thread which won
the race for the space allocation, cannot single-thread the process,
causing deadlock.
Reported and tested by: pho (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Adrian Chadd [Sun, 10 May 2015 06:59:34 +0000 (06:59 +0000)]
Turn ieee80211_start_scan_locked() into a swscan module private method.
It turns out that ieee80211_start_scan_locked() is only ever called by
the swscan code and it won't likely be required by firmware scanning
implementations.
So, don't bother keeping it in ieee80211_scan.c and it likely won't
become an API call.
Adrian Chadd [Sun, 10 May 2015 06:57:53 +0000 (06:57 +0000)]
Attempt to address Bug #176201 - don't advertise what the AP announced
to us. Instead, advertise what we can do based on what the AP says and what
we're capped at by the VAP settings.
For non-STA modes we still advertise what our VAP settings are.
It may be that I've over-complicated this and instead of capping things
we can just always announce what we're capable of. But this should at least
stop the blatantly wrong handling of A-MPDU parameters.
(I'll happily simplify things if someone can dig up a replacement, better
compliant behaviour.)
Remove unnecessary code and make use of generic implementations for
bus_alloc_resource(), bus_release_resource() and bus_set_resource()
(bus_generic_rl_alloc_resource(), bus_generic_rl_release_resource() and
bus_generic_rl_set_resource() respectively).
Do not print the resources for nomatch devices.
Use the inherited method for bus_get_resource_list() on ofw_iicbus.c.
Glen Barber [Sat, 9 May 2015 21:08:12 +0000 (21:08 +0000)]
Merge ^/projects/release-arm-redux into ^/head.
Of note:
- This commit adds native FreeBSD/arm release build support without
requiring out-of-tree utilities.
- Part of this merge removes the WANDBOARD-{SOLO,DUAL,QUAD} kernel
configuration files, for which the IMX6 kernel configuration file
should be used instead.
- The resulting images have a 'freebsd' user (password 'freebsd'),
to allow ssh(1) access when console access is not available (VGA
or serial). The default 'root' user password is set to 'root'.
- The /etc/ttys file for arm images now enable both ttyv0 and ttyu0
by default.
Help from: many (boot testing, feedback, etc.)
Sponsored by: The FreeBSD Foundation
The vmem callback to reclaim kmem arena address space on low or
fragmented conditions currently just wakes up the pagedaemon. The
kmem arena is significantly smaller then the total available physical
memory, which means that there are loads where kmem arena space could
be exhausted, while there is a lot of pages available still. The
woken up pagedaemon sees vm_pages_needed != 0, verifies the condition
vm_paging_needed() which is false, clears the pass and returns back to
sleep, not calling neither uma_reclaim() nor lowmem handler.
To handle low kmem arena conditions, create additional pagedaemon
thread which calls uma_reclaim() directly. The thread sleeps on the
dedicated channel and kmem_reclaim() wakes the thread in addition to
the pagedaemon.
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Rewrite amd64 PCID implementation to follow an algorithm described in
the Vahalia' "Unix Internals" section 15.12 "Other TLB Consistency
Algorithms". The same algorithm is already utilized by the MIPS pmap
to handle ASIDs.
The PCID for the address space is now allocated per-cpu during context
switch to the thread using pmap, when no PCID on the cpu was ever
allocated, or the current PCID is invalidated. If the PCID is reused,
bit 63 of %cr3 can be set to avoid TLB flush.
Each cpu has PCID' algorithm generation count, which is saved in the
pmap pcpu block when pcpu PCID is allocated. On invalidation, the
pmap generation count is zeroed, which signals the context switch code
that already allocated PCID is no longer valid. The implication is
the TLB shootdown for the given cpu/address space, due to the
allocation of new PCID.
The pm_save mask is no longer has to be tracked, which (significantly)
reduces the targets of the TLB shootdown IPIs. Previously, pm_save
was reset only on pmap_invalidate_all(), which made it accumulate the
cpuids of all processors on which the thread was scheduled between
full TLB shootdowns.
Besides reducing the amount of TLB shootdowns and removing atomics to
update pm_saves in the context switch code, the algorithm is much
simpler than the maintanence of pm_save and selection of the right
address space in the shootdown IPI handler.
Reviewed by: alc
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
If x86 CPU implementation of the MWAIT instruction reasonably
interacts with interrupts, query ACPI and use MWAIT for entrance into
Cx sleep states. Support C1 "I/O then halt" mode. See Intel'
document 302223-007 "Intelб╝ Processor Vendor-Specific ACPI Interface
Specification" for description.
Move the acpi_cpu_c1() function into x86/cpu_machdep.c and use
it instead of inlining "sti; hlt" sequence in several places.
In the acpi(4) man page, besides documenting the dev.cpu.N.cx_methods
sysctl, correct the names for dev.cpu.N.{cx_usage,cx_lowest,cx_supported}
sysctls.
Both jkim and avg have some other patches implementing the mwait
functionality; this work is unrelated. Linux does not rely on the
ACPI to provide correct tables describing Cx modes. Instead, the
driver has pre-defined knowledge of the CPU models, it was supplied by
Intel.
Tested by: pho (previous versions)
Sponsored by: The FreeBSD Foundation
Ian Lepore [Fri, 8 May 2015 19:43:53 +0000 (19:43 +0000)]
Move the text section to the start of the output file, so that when you
create a stripped .bin file from it the entry point is the first byte of
the file. (Will allow "load $addr $file ; go $addr" in u-boot.)
John Baldwin [Fri, 8 May 2015 19:43:37 +0000 (19:43 +0000)]
Place VM objects on the object list when created and never remove them.
This is ok since objects come from a NOFREE zone and allows objects to
be locked while traversing the object list without triggering a LOR.
Ensure that objects on the list are marked DEAD while free or stillborn,
and that they have a refcount of zero. This required updating most of
the pagers to explicitly mark an object as dead when deallocating it.
(Only the vnode pager did this previously.)
Zbigniew Bodek [Fri, 8 May 2015 18:47:19 +0000 (18:47 +0000)]
Port x86 busdma to ARM64
The x86 busdma subsystem allows using multiple implementations.
By default the classic bounce buffer approach is used, however
on systems with IOMMU it could be in runtime switched to more
efficient hardware accelerated implementation.
This commit adds ARM64 port of the x86 busdma framework and bounce
buffer backend. It is ready to use on IO coherent systems. If the
IO coherency cannot be guaranteed, the cache management operations have
to be added to this code in places marked by /* XXX ARM64TODO (...) */
comments. Also IOMMU support might be added by registering another
busdma implementation like it is already done on the x86.
Reviewed by: andrew, emaste
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Add support for more than 8 audio channels per PCM stream for USB
audio class compliant devices under FreeBSD. Tested using 16 recording
and 16 playback audio channels simultaneously.
Extend the maximum number of allowed PCM channels in a PCM stream to
127 and decrease the maximum number of sub-channels to 1. These
definitions are only used inside the kernel and can be changed later
if more than one sub-channel is desired. This has been done to allow
so-called USB audio rack modules to work with FreeBSD.
Bump the FreeBSD version to force recompiling all external modules.
The "SYSCTL_INT()" default value is only used for read only SYSCTLs
and is not applicable unless the integer pointer is NULL. Set it to
zero to avoid confusion. While at it remove extra semicolon at the end
of the "VT_SYSCTL_INT()" macro.
Prevent switching to NULL or own window in the "vt_proc_window_switch"
function. This fixes an issue where X11 keyboard input can appear
stuck. The cause of the problem is a duplicate TTY device window
switch IOCTL during boot, which leaves the "vt_switch_timer" running,
because the current window is already selected. While at it factor out
some NULL checks.
PR: 200032
Differential Revision: https://reviews.freebsd.org/D2480
Reported by: several people
MFC after: 1 week
Reviewed by: emaste
John Baldwin [Fri, 8 May 2015 16:02:31 +0000 (16:02 +0000)]
Use the kern.bootfile sysctl to set the default kernel path rather than
hardcoding /boot/kernel. This allows pmcstat(8) to work without -k when
using nextboot -k or 'boot foo' at the loader to boot alternate kernels.
Glen Barber [Fri, 8 May 2015 15:22:29 +0000 (15:22 +0000)]
Copy arm/WANDBOARD-QUAD.conf to arm/WANDBOARD-{SOLO,DUAL}.conf.
Ian informed me a few months ago that the WANDBOARD-* kernels will
eventually be combined into one that will work across all these
boards, but for now, build them individually.
Roger Pau Monné [Fri, 8 May 2015 14:48:40 +0000 (14:48 +0000)]
xen: introduce a newbus function to allocate unused memory
In order to map memory from other domains when running on Xen FreeBSD uses
unused physical memory regions. Until now this memory has been allocated
using bus_alloc_resource, but this is not completely safe as we can end up
using unreclaimed MMIO or ACPI regions.
Fix this by introducing a new newbus method that can be used by Xen drivers
to request for unused memory regions. On amd64 we make sure this memory
comes from regions above 4GB in order to prevent clashes with MMIO/ACPI
regions. On i386 there's nothing we can do, so just fall back to the
previous mechanism.
Sponsored by: Citrix Systems R&D
Tested by: Gustau Pérez <gperez@entel.upc.edu>
Andriy Gapon [Fri, 8 May 2015 13:55:24 +0000 (13:55 +0000)]
5809 Blowaway full receive in v1 pool causes kernel panic
Author: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Alex Reece <alex@delphix.com>
Reviewed by: Will Andrews <will@freebsd.org>
Approved by: Gordon Ross <gwr@nexenta.com>
Glen Barber [Fri, 8 May 2015 12:50:48 +0000 (12:50 +0000)]
Move the finished image build to the '/R' directory (the
standard 'install' location for other architectures), then
compress the image with xz(1), and generate the CHECKSUM
files.
Kevin Lo [Fri, 8 May 2015 09:01:00 +0000 (09:01 +0000)]
- Fix a wrong R92C_USTIME_TSF register definition
- Fix intitial transmit rate to an 11g rate for the RTL8188EU
- Add a comment about response rate settings
Adrian Chadd [Fri, 8 May 2015 00:56:56 +0000 (00:56 +0000)]
Add initial memory locality cost awareness to the VM, and include
a basic ACPI SLIT table parser.
For now this just exports the map via sysctl; it'll eventually be useful
to userland when there's more useful NUMA support in -HEAD.
* Add an optional mem_locality map;
* add a mapping function taking from/to domain and returning the
relative cost, or -1 if it's not available;
* Add a very basic SLIT parser to x86 ACPI.
Xin LI [Thu, 7 May 2015 20:54:38 +0000 (20:54 +0000)]
date(1): Make -r behave like GNU's version when the option can not be
interpreted as a number, which checks the file's modification time and
use that as the date/time value.
This improves compatibility with GNU coreutils's version of time(1).
m_dup() is supposed to give a writable copy of an mbuf chain. It uses
m_dup_pkthdr(), that uses M_COPYFLAGS mask to copy m_flags field.
If original mbuf chain has M_RDONLY flag, its copy also will have it.
Reset this flag explicitly.
projects / FreeBSD / FreeBSD.git / log