the routing table. Move all usage and references in the tcp stack
from the routing table metrics to the tcp hostcache.
It caches measured parameters of past tcp sessions to provide better
initial start values for following connections from or to the same
source or destination. Depending on the network parameters to/from
the remote host this can lead to significant speedups for new tcp
connections after the first one because they inherit and shortcut
the learning curve.
tcp_hostcache is designed for multiple concurrent access in SMP
environments with high contention and is hash indexed by remote
ip address.
It removes significant locking requirements from the tcp stack with
regard to the routing table.
Reviewed by: sam (mentor), bms
Reviewed by: -net, -current, core@kame.net (IPv6 parts)
Approved by: re (scottl)
accordingly. The define is left intact for ABI compatibility
with userland.
This is a pre-step for the introduction of tcp_hostcache. The
network stack remains fully useable with this change.
Reviewed by: sam (mentor), bms
Reviewed by: -net, -current, core@kame.net (IPv6 parts)
Approved by: re (scottl)
on SMP systems has a chance of working. This was a loose end of the
implementation of the ACPI Cx idle states. Since our logical CPU Id
is the ACPI processor Id, we do not need to jump through hoops to
obtain it.
Approved: re@ (jhb)
happen in interrupt context; 1) sleep locks, and 2) malloc/free
calls.
1) is fixed by using spin locks instead.
2) is fixed by preallocating a FIFO (implemented with a STAILQ)
and using elements from this FIFO instead. This turns out
to be rather fast.
OK'ed by: re (scottl)
Thanks to: peter, jhb, rwatson, jake
Apologies to: *
(1) Document the notion of using jail(8) to run "virtual servers" or
just to constrain specific applications. If only running specific
applications, some configuration steps are unnecessary (such as
editing rc.conf).
(2) Add some more subsection headers to break up the bigger chunks of
text.
(3) Clarify the problems associated with applications binding all IP
addresses in the host, and attempt to be more specific about
potential application problems. Document how to force sshd to
bind the the right socket.
(4) Suggest that in a jailed application scenario, you might want to
have the host syslogd listen on the socket in the jail, rather
than running syslogd in the jail.
(5) Catch another reference to /stand/sysinstall.
Approved by: re (bmah implicitly)
valid value for cx_lowest. To disable sleeping, use machdep.cpu_idle_hlt
instead. Update the version of the ACPI spec we implement.
Approved by: re (implicitly)
an acpi_cpu method for shutdown that disables entry to acpi_cpu_idle
and then IPIs/waits for threads to exit. This fixes a panic late in
reboot in the SMP case.
* In the !SMP case, don't use the processor id filled out by the MADT
since there can only be one processor. This was causing a panic in
acpi_cpu_idle if the id was 1 since the data was being dereferenced from
cpu_softc[1] even though the actual data was in cpu_softc[0] (which is
correct).
* Rework the initialization functions so that cpu_idle_hook is written
late in the boot process.
* Make the P_BLK, P_BLK_LEN, and cpu_cx_count all softc-local variables.
This will help SMP boxes that have _CST or multiple P_BLKs. No such
boxes are known at this time.
* Always allocate the C1 state, even if the P_BLK is invalid. This means
we will always take over idling if enabled. Remove the value -1 as
valid for cx_lowest since this is redundant with machdep.cpu_idle_hlt.
* Reduce locking for the throttle initialization case to around the write
to the smi_cmd port. Add disabled code to write the CST_CNT. It will
be enabled once _CST re-evaluation is tested (post 5.2R).
Thank you: dfr, imp, jhb, marcel, peter
Tested by: rwatson, Harald Schmalzbauer <h@schmalzbauer.de>
Approved by: re (rwatson)
occurs when kmem_malloc() fails to allocate a sufficient number of vm
pages. Specifically, we avoid the lock-order reversal by not grabbing
Giant around pmap_remove() if the map is the kmem_map.
Approved by: re (jhb)
Reported by: Eugene <eugene3@web.de>
- turn on SMP in generic
- add 'device atpic' - this is unconditional on i386, but certain nvidia
based systems need to disable acpi because the reference bios seems to be
hosed. If acpi is disabled, we won't find the apic. amd64 has the
mptable code in a seperate compile option as well.
- turn sym back on, it doesn't fail to compile anymore.
Approved by: re
to gcc have not been made for ia64, which means that executables still
have /usr/libexec/ld-elf.so.1 as the dynamic linker. This simply does
not work if /usr is a seperate filesystem not mounted when the kernel
tries to execute init(8).
Note that this is a temporary fix until a new gcc has been imported
that does have the required changes.
Approved: re@
source count pointers at them so that intr_execute_handlers() won't
choke when it tries to handle an unregisterd ATPIC interrupt source.
- Install the low-level ATPIC interrupt handlers when we first program the
ATPIC in atpic_startup() rather than at SI_SUB_INTR. This is only
necessary to work around buggy code that enables interrupts too early
in the boot process (namely, the vm86 code).
Approved by: re (rwatson)
regocnized as such at the time. Now that the other bogons in the
tree have been fixed, we can remove this ugly kludge.
o Remove stale/bogus opt_foo.h files. These are left over from
by-gone resources. And they point to the need, yet again, to
improve the build system so meta information is only in one place.
Submitted by: ru
Reviewed by: bde
Approved by: re@ (jhb)
purpose and the resulting vattr structure was ignored. In addition,
the VOP_GETATTR call was made with no vnode lock held, resulting in
vnode locking violation panic with debug kernels.
Reported by: truckman
Approved by: re@ (rwatson)
In practice it seems that in situations of high packet loss the ACK
timeout seems to hit this maximum (perhaps inappropriately, but the
estimation algorithm is not perfect, so apparently it happens). In
any case, 10 seconds is way too high a value so lower to 1 second.
MFC after: 3 days
the "old" SYSINIT. This makes sure things happen in the right order.
XXX: md(4) needs to be fully geom-ified and in particluar /dev/md.ctl
should be abandonded for the GEOM OaM api.
Approved by: re@
rather than right before and right after. This allows these routines
to manipulate the mesh.
KASSERT that nobody creates a geom on an alien class.
Assert topology in g_valid_obj().
Approved by: re@
TOC's for the same media!! that borks up GEOM.
Although this looks like bad HW the following patch removes the
chance for GEOM panic'ing.
Approved by: re@
that they will be installed before application constructors are invoked.
Its possible to link applications such that this fails, application code
is invoked before they are installed, but, well, Don't Do That.
Approved by: re (jhb)
the MAC label referenced from 'struct socket' in the IPv4 and
IPv6-based protocols. This permits MAC labels to be checked during
network delivery operations without dereferencing inp->inp_socket
to get to so->so_label, which will eventually avoid our having to
grab the socket lock during delivery at the network layer.
This change introduces 'struct inpcb' as a labeled object to the
MAC Framework, along with the normal circus of entry points:
initialization, creation from socket, destruction, as well as a
delivery access control check.
For most policies, the inpcb label will simply be a cache of the
socket label, so a new protocol switch method is introduced,
pr_sosetlabel() to notify protocols that the socket layer label
has been updated so that the cache can be updated while holding
appropriate locks. Most protocols implement this using
pru_sosetlabel_null(), but IPv4/IPv6 protocols using inpcbs use
the the worker function in_pcbsosetlabel(), which calls into the
MAC Framework to perform a cache update.
Biba, LOMAC, and MLS implement these entry points, as do the stub
policy, and test policy.
Reviewed by: sam, bms
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
in the .snap directory in the root of the filesystem being dumped.
Document that if the .snap directory is missing that it must be
created manually and that it should be owned by user root and
group operator and set to mode 770 before a live dump can be run.
o Each source gets its own queue, which is a FIFO, not a ring buffer.
The FIFOs are implemented with the sys/queue.h macros. The separation
is so that a low entropy/high rate source can't swamp the harvester
with low-grade entropy and destroy the reseeds.
o Each FIFO is limited to 256 (set as a macro, so adjustable) events
queueable. Full FIFOs are ignored by the harvester. This is to
prevent memory wastage, and helps to keep the kernel thread CPU
usage within reasonable limits.
o There is no need to break up the event harvesting into ${burst}
sized chunks, so retire that feature.
o Break the device away from its roots with the memory device, and
allow it to get its major number automagically.
