r353743 jkim Oct. 18, 2019, 10:08 p.m.
r353742 cem Oct. 18, 2019, 10:03 p.m.
Introduced in r353685 (sys/conf/files), r353694 (debugnet.c db_printf).

Submitted by:	kevans
Reported by:	cy
X-MFC-With:	r353685, r353694
r353741 vmaffione Oct. 18, 2019, 9:53 p.m.
This patch is part of an effort to make bhyve networking (in particular TCP)
faster. The key strategy to enhance TCP throughput is to let the whole packet
datapath work with TSO/LRO packets (up to 64KB each), so that the per-packet
overhead is amortized over a large number of bytes.
This capability is supported in the guest by means of the vtnet(4) driver,
which is able to handle TSO/LRO packets leveraging the virtio-net header
(see struct virtio_net_hdr and struct virtio_net_hdr_mrg_rxbuf).
A bhyve VM exchanges packets with the host through a network backend,
which can be vale(4) or if_tap(4).
While vale(4) supports TSO/LRO packets, if_tap(4) does not.
This patch extends if_tap(4) with the ability to understand the virtio-net
header, so that a tapX interface can process TSO/LRO packets.
A couple of ioctl commands have been added to configure and probe the
virtio-net header. Once the virtio-net header is set, the tapX interface
acquires all the IFCAP capabilities necessary for TSO/LRO.

Reviewed by:	kevans
Differential Revision:	https://reviews.freebsd.org/D21263
r353740 cem Oct. 18, 2019, 9:32 p.m.
They're formatted into the device name like unit numbers, anyway; store the
number in mda_unit => si_drv0 like dev2unit() expects.

No functional change intended.

Sponsored by:	Dell EMC Isilon
r353739 dim Oct. 18, 2019, 8:05 p.m.
[mips] Set default float ABI to "soft" on FreeBSD

  Initial patch by Kyle Evans.

  Fix PR43596

Requested by:	kevans
MFC after:	1 month
X-MFC-With:	r353358
r353738 dim Oct. 18, 2019, 8:02 p.m.
[mips] Support elf32btsmipn32_fbsd / elf32ltsmipn32_fbsd emulations

  Patch by Kyle Evans.

Requested by:	kevans
MFC after:	1 month
X-MFC-With:	r353358
r353737 dim Oct. 18, 2019, 7:30 p.m.
rename the WITH_LOADER_VERIEXEC_PASS_MANFIEST description to its correct
name.  Also correct a bunch of spelling errors in that description.

MFC after:	3 days
r353734 markj Oct. 18, 2019, 5:36 p.m.
In low memory conditions a significant number of pages may end up stuck
in the caches, and currently these caches cannot be reaped, leading to
spurious memory allocation failures and OOM kills.  So:

- Take into account the fact that we may cache up to two full buckets
  of pages per CPU, not just one.
- Increase the amount of RAM required per CPU to enable the caches.

This is a temporary measure until the page cache management policy is

PR:		241048
Reported and tested by:	Kevin Oberman <rkoberman@gmail.com>
Reviewed by:	alc, kib
Discussed with:	jeff
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D22040
r353733 markj Oct. 18, 2019, 5:01 p.m.
The softdep lock names were unusually long and tended to stick out in
lock profiling reports.  Abbreviate them and make them consistent with
our conventional style for lock names.

Reviewed by:	mckusick
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D22042
r353732 glebius Oct. 18, 2019, 3:20 p.m.
r353731 markj Oct. 18, 2019, 2:05 p.m.
- We load the kernel at 0x200000.  Memory below that address need not
  be executable, so do not map it as such.
- Remove references to .ldata and related sections in the kernel linker
  script.  They come from ld.bfd's default linker script, but are not
  used, and we now use ld.lld to link the amd64 kernel.  lld does not
  contain a default linker script.
- Pad the .bss to a 2MB as we do between .text and .data.  This
  forces the loader to load additional files starting in the following
  2MB page, preserving the use of superpage mappings for kernel data.
- Map memory above the kernel image with NX.  The kernel linker now
  upgrades protections as needed, and other preloaded file types
  (e.g., entropy, microcode) need not be mapped with execute permissions
  in the first place.

Reviewed by:	kib
MFC after:	1 month
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D21859
r353730 markj Oct. 18, 2019, 1:56 p.m.
With an upcoming change the amd64 kernel will map preloaded files RW
instead of RWX, so the kernel linker must adjust protections
appropriately using pmap_change_prot().

Reviewed by:	kib
MFC after:	1 month
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D21860
r353729 markj Oct. 18, 2019, 1:53 p.m.
Use the section flags to derive mapping protections.  When multiple
sections overlap within a page, the union of their protections must be
applied.  With r353701 the .text and .rodata sections are padded to
ensure that this does not happen on amd64.

Reviewed by:	kib
MFC after:	1 month
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D21896
r353727 avg Oct. 18, 2019, 12:34 p.m.
bus_generic_detach was not enough, we also need to clean up the iicbus
child device.

MFC after:	1 week
r353726 avg Oct. 18, 2019, 12:32 p.m.
The change is for the example in textdump.4 and the default ddb.conf.

First of all, doadump now requires an argument and it won't do a
textdump if the argument is not 'true'.
And 'textdump dump' is more idiomatic anyway.

For what it's worth, ddb 'dump' command seems to always request a vmcore
dump even if a textdump was requested earlier, e.g., by 'textdump set'.
Finally, ddb 'call' command is not documented.

MFC after:	2 weeks