reshuffle the bios.h headers

fix tcp_lro_rx_ipv4 for drivers that do not set CSUM_IP_CHECKED.

synx cxgbe(4) and cxgb(4) with FreeBSD 9.2 release

dont conflict with cam by renaming to if_enc

ensure the native ioctl path always allocates a 4k buffer.

remove compat shim

remove hack.. we support this now.

fixup file

cleanup log rotation

add the feature flags code for lz4 compression (we already had lz4 backported to zpool 28

add virtio

fix unsafe pointer dereferences

vn_io_faults_cnt: use u_long consistently.

add intel lynx point PCH HD audio device ids

fix ref counting and lifetime issues.

Add cam infrastructure to allow reporting when a drive long read capacity data changes.

print slightly more useful info on the bad pte panic

allow ptrace(2) op on the child created by vfork(2) if the debugger is not present.

ext2fs: misc cleanup. Correct off by one error

This small change takes care of a race condition that can occur when both sides close at the same time.

remove ia64 code

add notes for virtio

Make sure that all mouse buttons are released when clients using /dev/consolectl close.

Prezero the acl strcuture to avoid leaking anything into userland

remove reference to the rlist code from comments.

fix reversed condition

The current ZFS code expects ddt_zap_count to alays succeed by asserting the underlying zap_count to return no errors.

Backup FATs were sometimes marked dirty by copying their first block from the primary FAT, and then not marked clean. Force them to be clean

The mountmsdosfs function had an insane sanity test

assert that the mbuf in the chain has a sane length.

remove KM_ZERO

Print FC PortID as a hex number.

Fix a panic during CAM EDT traversal.

XPT_DEV_MATCH is probably the only xpt_action() method that is called without holding SIM lock.

Remove priority enforcement from xpt_ation()

Remove useless NULL checks after M_WAITOK allocations.

add a bunch of new ASC/ASCQ values from T10 site.

fix tag

detect we are in KVM

sync netmap with FreeBSD @ rev 246355

add vfs_hash_index

remove redundant check

add dtrace rpoblems to linuxolator

fix problem with geom label not recognizing UFS labels on filesytems that have been resized.

failure should not be fatal.

add write suspension mechanism.

make it possible to force async server side on NFS server.

windows driver writes related volume IDs to metadata file.d Use that value as a hint for device number

improve support for disabled disks.

Implmeent migration from single disk to RAID1/IRRT for Intel metadata.

For promise/amd metadata add support for disks with capacity above 2TiB and for volumes with sector size above 512 bytes.

ciss(4) should increase CISS_MAX_LOGICAL to 107

make GRAID3 more aggressive in marking volumes as clean on shutdown.

ext2fs: make some inode fields match spec

remove unused code

fix not smp build, replace incorrect function names in printf(9)

remove giant lock, fine grain locking is working

add hpt27xx to GENERIC kernel

disable the reallocation code. testing with fsx has revealed problems and in order to hunt the bugs reduce complexity.

For fiber PHYs, BRGPHY_MII_1000CTL register is not defined so do not touch it.

add checks for ata_scr_read return statuses

fix a truncation issue with softdep journaling that could leak blocks on crash.

implement BIO_FLUSH support around journal entries.

ext2fs: add some DOINGASYNC checks to match ffs.

add zfs_bmap to aid vnode_pager_haspage

zfs_geetpages: optimize for large block sizes.

for zfs vnodes, use standard inode number hash algorithm

set the v_hash for a new vnode in the getnewvnode() to the value calculated based on the structure address.

print correct unit number when attaching preloaded memory disks.

bump for netbsd imports

re-add this

turn unpriv mlock off for compat

cleanup the dinode structure.

when nullfs mount is forcibly unmounted and nullfs vnode is reclaimed.

add yet another flag for the vfs_write_resume_flags to avoid calling suspension cleanup handle after the suspend is lifted

add device_identify method for wbwd(4), required on most recent supermicro motherboards.

tag

tweak locking

remove duplicates

use DEVMETHOD_END

protect p->p_pgrp dereference with process lock

add support for BCM57766 ASIC. Also add BCM47751 device used on apple thunderbolt ethernet.

must holde a write lock on teht able while allocating an L2 entry. Add support for T440-LP-CR card in cxgbe(4)

make dst_sa init only when needed.

disallow attaching preloade dmemory disk via ioctl

support detection of Synaptics touchpad v7.5 and above.

update arcmsr(4) to vendor version 1.20.00.26

reduce stack usage in usb aduio.

add lenovo X300 quirks for AD1984A codec.

 fix how we handle v_writecount

this is impossible.

add flags for ddb

add new mount flag that dotdot lookups shall override any shared lock requests.

zfs: overhaul zfs-vfs glue for vnode life cyle management.

zfs roopool: add support for multi-vdev configs.

not needed.

assert_vop_locked should treat LKEXCLOTHER as the not locked case.

remove unneeded locks

dont pass provider name as a format string

handle ipv6 next hop since it is both protocols.

fix to ensure integrity of the callwheel tailqs. rarrange comments

vnode_free_list_mtx is required

line up backslashes

use SA_ZPL_CRTIME for creation

do not ignore zero address.

remove redundant call to AUDIT_ARG_UPATH1. add event handling for missing events

delete case is never true

init ub_version before calling spa_config_parse

terminate cmn_err mesages with new line

fix locking protocol description for lookup and cached lookup

add two new options to the nfssvc(2) syscall that allow processes running as root to suspend and resume execution of nfsd

add device id to disk output

remove opt_inet.h as it is not needed. connet ip6_mroute to build

import a new version of zfs from opensolaris & freebsd

fix leak

get rid of possible reference leak

do not hardcode phy address

do not perform any special handling for jump frames or speed

honor phy type fiber for several NICs. do not force PCIe 1.0a mode on newer devices.

obtain snapname in remount case

clear VI_MOUNT before returing if fails

zfs_unmount: no need to set MNTK_UNMOUNTF here

dont overthink it

remove disk device entries for zvol snapshots

cleanup counting

zero out allocated memory to prevent random kernel memory leaks

zoneid has unsigned type. SCOPE6_LOCK protects v_sid_default. if_afdata lock was convert from mux to rw

Kernel and modules have "set_vnet" linker set, where virtualized
global variables are placed. When a module is loaded by link_elf
linker its variables from "set_vnet" linker set are copied to the
kernel "set_vnet" ("modspace") and all references to these variables
inside the module are relocated accordingly.

The issue is when a module is loaded that has references to global
variables from another, previously loaded module: these references are
not relocated so an invalid address is used when the module tries to
access the variable. The example is V_layer3_chain, defined in ipfw
module and accessed from ipfw_nat.

The same issue is with DPCPU variables, which use "set_pcpu" linker
set.

Fix this making the link_elf linker on a module load recognize
"external" DPCPU/VNET variables defined in the previously loaded
modules and relocate them accordingly. For this set_pcpu_list and
set_vnet_list are used, where the addresses of modules' "set_pcpu" and
"set_vnet" linker sets are stored.

Note, archs that use link_elf_obj (amd64) were not affected by this
issue.

Obtained from: FreeBSD 243308

uint is always greater than zero

if an error uccurnts when transmitting one mbuf free the rest instead of leaking

add systl to report firmware build number

correct spelling

sync with freebsd stable (post 9.3)

Initial import of FreeBSD boot loader rework from 9.2 release.

userboot 2

todo: add more midnightbsd partition type handling.

Obtained from: FreeBSD svn 243243

we use freebsd types here

add midnightbsd and freebsd nandfs types

add nandfs types

use march=i386 for both i386 and amd64

zfs close should be called with count 1

only for specific ata pio commands transfer several sectors per DRQ block. All others transfer one sector or 512 bytes at one time.

Implement sata revision (speed) control for legacy sta controller for both and run time

change the XNB_ASSERT from a statement expression to do-while(0).

Asus EEPC 1001px has a strange variant of the ALC269 coded.

print card and subsystem IDs in verbose logs

dont use falign-fucntions option with clang

revert this part

force segments to 1 for mapping control spaces.

shrink boot2 by 8 bytes.

fix faulty error code handling in read(2) on TTYs.

zfs: wait in arc_lowmem only if curproc=pageproc

fix possible spurious sbunlock in sctp_sorecvmsg

fix typos

add some identifiers for newer intel usb controllers

add decoding of the missed VI_ and VV_ flags to ddb show vnode command

order the enumeration of the MNT_ flags to be the same as the order of their definitions

disallow sectorsize larger than MAXPHYS and mediasize smaller than sectorsize

make graid command line a bit more friendly by allowing volume name or provider name to be specified instead of geom name

TSO engine of L1 requires a separate DMA descriptor for TCP payload.

rename deep sleep vars for acpi

revert this part of the change

add detection of serial console presense

handle console that fail to probe

increase max logical drives we support

should be int32_t and not uint32_t

dirty the newly copied anonymous pages after the wired region is forked.

avoid panic

constify zone arg

remove dead code

product agnostic match

add iphone5 tethering

sync with freebsd 9.2

zfs boot: export boot/primary pool and vdev guid all teh way to kenv

move wmi_info_list into sc

zfs boot: add lszfs command to i386 loader

zfs boot: add code for listing child datasets

use the same zfs dataset naming format as loader

update hptiop(4) to version 1.8. Adds RocketRAID 4500 series support

fix brace

dont define twice

do a bus dmasync postwrite over the dma map

dont define lfence twice

add comment

supply the pr_ctloutput method for local datagram sockets

add supported device

nullify last previously used pointer

Add explicit check for not set time inside cam_periph_freeze_after_event().

System time is set later on boot process then initial bus scan by CAM.
Until that moment microtime() is equal to microuptime(), and if system
boots quickly, the value can be close to zero. That causes settle time
waiting even for buses that don't use reset during probe.

On my test system this reduces boot time by 1 second if USB enabled, or
by 4 seconds if USB disabled.  CAM waited for ctl2cam0 bus "settle".

use xpt_create_path_unlocked

fix xpt debug

use separate malloc buckets for CAM devices, CCBs and paths

there are SCSI conditions that are not errors.

remove null checks from periph drivers.

Always provide sndbuf and MSS values in a flowc command, even when the
driver is going to abort the connection right after the flowc.

add a kpi to allow to reserve some amount of space in the numvnodes counter without actually allocating

print rip value

zvol: set mediasize in geom provider right upon its creation

Increase device CCB queue array size by CAM_RL_VALUES - 1 (4) elements.
It is required to store extra recovery requests in case of bus resets.
On ATA/SATA this fixes assertion panics on HEAD with INVARIANTS enabled or
possible memory corruptions otherwise if timeout/reset happens when device
CCB queue is already full.

add hack for lacie external drive using a samsung disk

merge from netbsd

reading registers doesnt require locking.

ata_da: set disk::d_ident from serial number

zfs: allow a zvol to be used as a pool vdev, again

add firmware missing in previous commit

fix a number of issues with cxgbe. Obtained from: FreeBSD svn 241573

zfs boot: choose a first pool if none is explicitly requested.

avoid page table page corruption, change pmap_pv_reclam method of mapping page table pages.

allow nmbjumbop, nmbjumbo9, and nmbjumbo16 to be set via loader.

allow cxgbe to be built in the kernel

remove redundant call to pr_ctloutput from code that handles SO_SETFIB

add constants for programming interfaces for NVM

spcify MTX_RECURSE for the controller io_lock. prevents panics on boot with INVARIANTS enabled.

Refine the changes made in r208212 to avoid bogus failures from
if_delmulti() when clearing the configuration for a subinterface when
the parent interface is being detached.  The current code was still
triggering an assertion in if_delmulti() due to the parent interface being
partially detached.  Fix this by not calling if_delmulti() at all if the
parent interface is being detached.  Warn if if_delmulti() fails when the
parent is not being detached (but similar to 208212, still proceed with
tearing down the vlan state).

Obtained from: FreeBSD

grab the mfi_config_lock while performing a MFI_DCMD_CFG_FOREIGN_IMPORT request on behalf of a user utility

Attach interrupt handlers during attach instead of during the first time
the interface is brought up.  Without this, the boot time interrupt
round-robin assignment does not think the allocated interrupt resources
are active and leaves them assigned to CPU 0.

While here, add descriptive tags to each interrupt handler when MSI-X
is used.

zfs boot: add a size check for a value in fzap_lookup

zfs allow both debug and zfs debug to be defined on command line

 g_disk_flushcache definitely should not be traced under
G_T_TOPOLOGY

boot: file_loadraw should strdup name argument

Allow idle threads to steal second threads from other cores on systems with
8 or more cores to improve utilization.  None of my tests on 2xXeon (2x6x2)
system shown any slowdown from mentioned "excess thrashing".  Same time in
pbzip2 test with number of threads more then number of CPUs I see up to 10%
speedup with SMT disabled and up 5% with SMT enabled.  Thinking about
trashing I was trying to limit that stealing within same last level cache,
but got only worse results.  Present code any way prefers to steal threads
from topologically closer cores.

Rework r220198 change (by fabient). I believe it solves the problem from
the wrong direction. Before it, if preemption and end of time slice happen
same time, thread was put to the head of the queue as for only preemption.
It could cause single thread to run for indefinitely long time. r220198
handles it by not clearing TDF_NEEDRESCHED in case of preemption. But that
causes delayed context switch every time preemption happens, even when not
needed.

Solve problem by introducing scheduler-specifoc thread flag TDF_SLICEEND,
set when thread's time slice is over and it should be put to the tail of
queue. Using SW_PREEMPT flag for that purpose as it was before just not
enough informative to work correctly.

On my tests this by 2-3 times reduces run time deviation (improves fairness)
in cases when several threads share one CPU.

Obtained from FreeBSD

handle null terminating character.

partial revert of last commit

shorten name so it fits

fix typos

strealine use  of cdevpriv

do not skip two elements of the tid_buffer when reusing the buffer slot. make updates of head and tail pointers explicit

sync with freebsd to minimize diffs here

plug the accounting leak for the wired pages when msync(MS_INVALIDATE) is performed ont eh vnode mapping which is wired in other address space. Obtained from: FreeBSD svn 240989

fix a lockup with rpc.lockd

do not destroy for now because there is no init

sanity checks tweaked per freebsd svn rev 240957

fix a panic when trying to play invalid audio tracks

On BIO_ERROR, set bio_resid to stop losing data in the error case.

Submitted by: Mark Johnston <markjdb@gmail.com>

add include

add explicit fences right before rdtsc in the timecounters get functions

remove unneeded forward declaration.

add more files

bring in FreeBSD method to export kernel timekeeping data to usermode using a shared page.

bring some things from Bull GNU/Linux NFSv4 project

page flag PGA_WRITEABLE is set and cleared exclusively by the pmap layer, but it is read directly by the MI VM layer.

simplify pmap_unmapdev()

remove dependence on MAXPHYS

update archmsr(4) to 1.20.00.25

In soreceive_generic() when checking if the type of mbuf has changed
check it for MT_CONTROL type too, otherwise the assertion
"m->m_type == MT_DATA" below may be triggered by the following scenario:

- the sender sends some data (MT_DATA) and then a file descriptor
  (MT_CONTROL);
- the receiver calls recv(2) with a MSG_WAITALL asking for data larger
  than the receive buffer (uio_resid > hiwat).

In soreceive_generic() remove the optimization for the case when
MSG_WAITALL is set, and it is possible to do the entire receive
operation at once if we block (resid <= hiwat). Actually it might make
the recv(2) with MSG_WAITALL flag get stuck when there is enough space
in the receiver buffer to satisfy the request but not enough to open
the window closed previously due to the buffer being full.

The issue can be reproduced using the following scenario:

On the sender side do 2 send(2) requests:

1) data of size much smaller than SOBUF_SIZE (e.g. SOBUF_SIZE / 10);
2) data of size equal to SOBUF_SIZE.

On the receiver side do 2 recv(2) requests with MSG_WAITALL flag set:

1) recv() data of SOBUF_SIZE / 10 size;
2) recv() data of SOBUF_SIZE size;

We totally fill the receiver buffer with one SOBUF_SIZE/10 size request
and partial SOBUF_SIZE request. When the first request is processed we
get SOBUF_SIZE/10 free space. It is just enough to receive the rest of
bytes for the second request, and soreceive_generic() blocks in the
part that is a subject of this change waiting for the rest. But the
window was closed when the buffer was filled and to avoid silly window
syndrome it opens only when available space is larger than sb_hiwat/4
or maxseg. So it is stuck and pending data is only sent via TCP window
probes.

Obtained from: FreeBSD

more comment fixes

fix comment

sync with solaris

make kern.maxtsiz, kern.dfldsiz, kern.maxdsiz, kern.dflssiz, kern.maxssiz and kern.sgrowsiz systl writable.

do not increment the parent firmware reference count when any other image is registered

add missing file

make dumptid non static. it is used by libkvm

 The llentry_update() is used only by flowtable and the latter
  always passes NULL pointer to it. Thus, code can be simplified
  and function renamed to llentry_alloc() to match rtalloc().

  When using flowtable llentrys can outlive the interface with
  which they're associated at which the lle_tbl pointer points
  to freed memory and the llt_free pointer is no longer valid.

  Move the free pointer in to the llentry itself and update the
  initalization sites.

remove dead code. remove route caching from IP multicast routing code. there were reference leaks and it didnt do much.

allow passing with /dev prefix

make more readable

use provided name when allocating ksid domain. for greater zfs compatibility when other operating systems read disk

work around several warnings from clang in XFS.

add a bunch of ATI HDMI HDA controller IDS.

Update cxgbe

Convert some fixed params to tunables
if_iqdrops should include frames truncated within the chip.

Assume INET/INET6 and TCP_OFFLOAD when the driver is built out of tree.

Fix some buffer sizes.

add fine grained pv chunk and list locking to the amd64 pmap, enabling concurrent execution of several functions.

if the inactive queue scan isnt restarted, then teh var addl_page_shortage_init isnt needed

drop page queues mutex on each iteration of vm_pageout_scan over the inactive queue, unless busy page is found.  Avoid vm page queues lock leak.

do not use leading zero for dates.

add missing sleep stat increase

get rid of unused vars

Add Perle Speed LE cards to puc

add verify_10 def

handle a case where we had an SRR that pushed back in

on lun disable, complete all INOTs and ATIOs with CAM_REQ_ABORTED. Obtained from FreeBSD

fix an oops where we wiped out DMA maps

maga change for FC-Tape.

implement sysctl for fibre channel

clean up multi-id mode so it is driven by the f/w load

bring in some improvements from FreeBSD svn rev 240008

introdocue magic var on i386 for curpcb

stop clearing x87 exceptions in the mF handler on i386

force clean FU state in PCB on i386

In tcp timers, check INP_DROPPED flag a little later, after
callout_deactivate(), so if INP_DROPPED is set we return with the
timer active flag cleared.

For me this fixes negative keep timer values reported by `netstat -x'
for connections in CLOSE state.

Obtained from: FreeBSD

fix msg

fix spacing

force clean FPU state in PCB user FPU save area

introduce curpcb magic var

add stmxcsr

convert IPv6 read-only stats sysctls to read-write. Teach netstat ( 1 ) -z to reset these.

always enable bus mastering on bridges so that transactions on teh secondary are passed to the primary

Add a clts() wrapper around the 'clts' instruction to <machine/cpufunc.h>
on x86 and use that to implement stop_emulating() in the fpu/npx code.
Reimplement start_emulating() in the non-XEN case by using load_cr0() and
rcr0() instead of the 'lmsw' and 'smsw' instructions.  Intel explicitly
discourages the use of 'lmsw' and 'smsw' on 80386 and later processors in
the description of these instructions in Volume 2 of the ADM.

Obtained from: FreeBSD svn rev 239914

Put struct ostat and struct nstat under #ifdef _KERNEL. The
compatibility definitions are only needed for implementation of the
syscalls, they cause namespace pollution and are not useful for
applications.

fix symbol visibility and style issues

xsavem natively supported, get rid of assembly versions in code

Partially revert r217515 so that the mem_range_softc variable is always
present on x86 kernels.  This fixes the build of kernels that include
'device acpi' but do not include 'device mem'.

Obtained from: FreeBSD

honor db_pager_quit

add F_DUP2FD_CLOEXEC

enable deadlock avoidance code for NFS client

do not override an error from uiomove with non error results from bwrite

Extend the KPI to lock and unlock f_offset member of struct file.  It
now fully encapsulates all accesses to f_offset, and extends f_offset
locking to other consumers that need it, in particular, to lseek() and
variants of getdirentries().

fix usage

count and export the number of prefaulting happen.

Obtained from: FreeBSD

Add a rangelock implementation, intended to be used to range-locking
the i/o regions of the vnode data space. The implementation is quite
simple-minded, it uses the list of the lock requests, ordered by
arrival time. Each request may be for read or for write. The
implementation is fair FIFO.

Obtained from: FreeBSD

  Typo in previous change: print half the theoretical maximum as maximum
  recommended amount.

- Change back "d_ofs" to int8_t to not pessimize padding and size of "struct puc_cfg".
- Use "puc_config_moxa" for Moxa boards that need d_ofs greater than 0x7f

deliver sigsys to the guilty thread, not the process

sync with freebsd rev 244242

Fix/add support for SCSI UNMAP to ATA DSM translation.

This addresses kernel panic observed when sending SCSI UNMAP
commands to SATA disks attached to isci(4).

1) Flesh out callback routines to allocate/free buffers needed for
translating SCSI UNMAP data to ATA DSM data.
2) Add controller-level pool for storing buffers previously allocated
for UNMAP translation, to lessen chance of no buffer available
under memory pressure.
3) Ensure driver properly handles case where buffer pool is empty
and contigmalloc returns NULL.
4) Clear freeze bit in isci_remote_device_release_lun_queue() before
calling xpt_release_devq to ensure that any ccbs which immediately
start during the call to xpt_release_devq() see an accurate picture
of the frozen_lun_mask.  This code path is extensively exercised
when tagged read/write commands mix with non-tagged DSM commands.

Obtained from: FreeBSD

add descriptions for nics.

Add a sysctl kern.pid_max, which limits the maximum pid the system is
allowed to allocate, and corresponding tunable with the same
name. Note that existing processes with higher pids are left intact.

compat for truncate and ftruncate

Real hardware, as opposed to QEMU, does not allow to have a call gate
in long mode which transfers control to 32bit code segment. Unbreak
the lcall $7,$0 implementation on amd64 by putting the 64bit user code
segment' selector into call gate, and execute the 64bit trampoline
which converts the return frame into 32bit format and switches back to
32bit mode for executing int $0x80 trampoline.

add legacy compat call

Adjust the r205536, by allowing a non-zero offset for anonymous
mappings for a.out binaries. Apparently, a.out ld.so from FreeBSD
1.1.5.1 can issue such requests.

Fix a bug with memguard(9) on 32-bit architectures without a
VM_KMEM_MAX_SIZE.

The code was not taking into account the size of the kernel_map, which
the kmem_map is allocated from, so it could produce a sub-map size too
large to fit.  The simplest solution is to ignore VM_KMEM_MAX entirely
and base the memguard map's size off the kernel_map's size, since this
is always relevant and always smaller.

always init pl_event

Bump dtrace_helper_actions_max from 32 to 128

Dave Pacheco from Joyent (and Dtrace.org) bumped the cap to 1024 but,
according to his blog, 128 is the recommended minimum.

For now bump it safely to 128 although we may have to bump it further
if there is demand in the future.

init npages should be initialized cxgb(4)

add additional PCI IDs for High Point RocketRaid 43xx and 3xxx devices.

add a module version so others can depend on it

fix kernel panic on camcontrol reset for mps

work around file modifications causing rebuilds in some cases

Add rmb() to tsc_read_##x to enforce serialization of rdtsc captures.

Intel Architecture Manual specifies that rdtsc instruction is not serialized,
so without this change, TSC synchronization test would periodically fail,
resulting in use of HPET timecounter instead of TSC-low.  This caused
severe performance degradation (40-50%) when running high IO/s workloads due to
HPET MMIO reads and GEOM stat collection.

Tests on Xeon E5-2600 (Sandy Bridge) 8C systems were seeing TSC synchronization
fail approximately 20% of the time.

Obtained from: FreeBSD 9 stable svn rev 283910

fix typo in bzero length argument during sense fetching. this fixes cd burning in PIO mode

fix several reads beyond the mapped first page of the binary in the ELF parser.

revert to old behavior of allocating table/table entries using M_NOWAIT. Use M_NOWAIT while hoding the pf giant lock. Obtained from: FreeBSD SVN 238600

technically we are at least compatiblible with 9 stable at this version of freebsd.

copy from freebsd

   Fix a crash in tcp_input(), that happens when mbuf has a fwd_tag on it,
  but later after processing and freeing the tag, we need to jump back again
  to the findpcb label. Since the fwd_tag pointer wasn't NULL we tried to
  process and free the tag for second time.

fix makefile

remove useless comment.

Don't call bus_dmamap_load in CAM_DIR_NONE case, since there is nothing
to map, and technically this isn't allowed.

Functionally, it works OK (at least on x86) to call bus_dmamap_load with
a NULL data pointer and zero length, so this is primarily for correctness
and consistency with other drivers.

While here, remove check in isci_io_request_construct for nseg==0.
Previously, bus_dmamap_load would pass nseg==1, even for case where
buffer is NULL and length = 0, which allowed CAM_DIR_NONE CCBs
to get processed.  This check is not correct though, and needed to be
removed both for the changes elsewhere in this patch, as well as jeff's
preliminary bus_dmamap_load_ccb patch (which uncovered all of this in
the first place).

Obtained from: FreeBSD SVN 244128

add walltimestamp support to DTrace.

work around issues with Samsung 840 pro drives.  It reports SATA async notification but returns errors on attemps to use it. Now this error is reported but not fatal.

 These probes are most useful when looking into the structures
 they provide, which are listed in io.d.  For example:

 dtrace -n 'io:kernel::start { printf("%d\n", args[0]->bio_bcount); }'

 Note that the I/O systems in FreeBSD and Solaris/Illumos are sufficiently
 different that there is not a 1:1 mapping from scripts that work
 with one to the other.

This commit includes the fix so that our probes use "kernel"
instead of the Solaris specific "genunix"

Obtained from: FreeBSD

In pget(9), if PGET_NOTWEXIT flag is not specified, also search the
zombie list for the pid. This allows several kern.proc sysctls to
report useful information for zombies.

Hold the allproc_lock around all searches instead of relocking it.
Remove private pfind_locked() from the new nfs client code.

Look for zombie process only if we were given process id.

Obtained from: FreeBSD

ext2fs fix

While a file is first being written, the dynamic block reallocation realocates t
he file's blocks so as to cluster them together into a contiguous set of blocks
on the disk.

When the cluster crosses the boundary into the first indirect block, the first i
ndirect block is initially allocated in a position immediately following the las
t direct block. Block reallocation would usually destroy locality by moving the
indirect block of the way to keep the data blocks contiguous.

Obtained from: FreeBSD svn 243913

Add a special meaning to the negative ticks argument for taskqueue_enqueue_timeout. do not ream the callout if it is already armed and the ticks is negative. otherwise rearm it to fire in abs(ticks) ticks in the future.

Obtained from: FreeBSD svn rev 243850