more than one sf_buf for one vm_page. To accomplish this, we add
a global hash table mapping vm_pages to sf_bufs and a reference
count to each sf_buf. (This is similar to the patches for RELENG_4
at http://www.cs.princeton.edu/~yruan/debox/.)
For the uninitiated, an sf_buf is nothing more than a kernel virtual
address that is used for temporary virtual-to-physical mappings by
sendfile(2) and zero-copy sockets. As such, there is no reason for
one vm_page to have several sf_bufs mapping it. In fact, using more
than one sf_buf for a single vm_page increases the likelihood that
sendfile(2) blocks, hurting throughput.
(See http://www.cs.princeton.edu/~yruan/debox/.)
- This is heavily derived from John Baldwin's apic/pci cleanup on i386.
- I have completely rewritten or drastically cleaned up some other parts.
(in particular, bootstrap)
- This is still a WIP. It seems that there are some highly bogus bioses
on nVidia nForce3-150 boards. I can't stress how broken these boards
are. I have a workaround in mind, but right now the Asus SK8N is broken.
The Gigabyte K8NPro (nVidia based) is also mind-numbingly hosed.
- Most of my testing has been with SCHED_ULE. SCHED_4BSD works.
- the apic and acpi components are 'standard'.
- If you have an nVidia nForce3-150 board, you are stuck with 'device
atpic' in addition, because they somehow managed to forget to connect the
8254 timer to the apic, even though its in the same silicon! ARGH!
This directly violates the ACPI spec.
with multiple ports on a shared interrupt demultiplexed by the puc_intr()
handler.
siointr1() first read as much input as possible and then checked all
possibly-relevant status registers, partly for robustness and partly
for historical reasons. This is very bad if it is called for every
port sharing an interrupt like puc_intr() does. It can spend too long
reading all the input for some ports when the interrupt is for a more
urgent event on another, or just too long checking all the status
registers when there are lots of ports. The inter-character time is
too long for reading all the input even when the interrupt is for a
transmitter interrupt on the same port, and at 921600 bps the inter-char
time is 10.85 usec and was often exceeded with just 2 ports, leaving
the transmitters idle for about 6% of the time.
The tweak is to break out of the read loop after reading 1 char if
output can be done. This avoids most of the idle transmitter time for
2 active ports at 921600 bps bidirectional on the test system. It
also reduces overhead by about 20%. More complete fixes use the
programmable tx low watermark on 16950's and reduce overhead by another
65%.
do not have mh_nextpkt initialized. Somtimes what's there is "1", and the
ip_input() code pukes trying to m_free() it, rendering divert sockets and
such broken.
This really underscores the need to get rid of MT_TAG.
Reviewed by: rwatson
is the warning that points to the bug in `(char *)malloc(...)' where
malloc() is implicitly declared as returning int. We do similar things
here, but they work because u_int is the same as uintptr_t on i386's.)
system calls, and prefer these calls over getsockopt()/setsockopt()
for ABI reasons. When addressing UNIX domain sockets, these calls
retrieve and modify the socket label, not the label of the
rendezvous vnode.
- Create mac_copy_socket_label() entry point based on
mac_copy_pipe_label() entry point, intended to copy the socket
label into temporary storage that doesn't require a socket lock
to be held (currently Giant).
- Implement mac_copy_socket_label() for various policies.
- Expose socket label allocation, free, internalize, externalize
entry points as non-static from mac_net.c.
- Use mac_socket_label_set() in __mac_set_fd().
MAC-aware applications may now use mac_get_fd(), mac_set_fd(), and
mac_get_peer() to retrieve and set various socket labels without
directly invoking the getsockopt() interface.
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
will now need editing except for spot checks.
Changed this buffer from a circular one to a linear one. This is more
useful for some cases and the sysctl that prints it doesn't support
circular buffers.
Fixed (output) formatting bugs in this sysctl. An off by 1 error caused
a garbage byte to be returned after annotation of large deltas, and
a race with the writer sometimes caused premature string termination.
o when compiling lint, undefine certain things and redefine them so that the
driver doesn't #error out. Since lint kernels aren't supposed to be
bootable, I'm no troubled by this breakage.
This fixes the tinderbox
Suggested by: rwatson
Approved by: bms
SO_PEERLABEL. This provides an interface to query the label of a
socket peer without embedding implementation details of mac_t in
the application. Previously, sizeof(*mac_t) had to be specified
by an application when performing getsockopt().
Document mac_get_peer(3), and expand documentation of the other
mac_get(3) functions. Note that it's possible to get EINVAL back
from mac_get_fd(3) when pointing it at an inappropriate object.
NOTE: mac_get_fd() and mac_set_fd() support for sockets will
follow shortly, so the documentation is slightly ahead of the
code.
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
mac_setsockopt_label() into mac_socket_label_set(); make it non-static
so that it can be invoked from kern_mac.c for mac_set_fd().
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
While we end up the same place, we end up with two different CS register
values after the jump and 0xf000 is compatible with the hardware reset
value.
This makes a difference if the BIOS does a near jump before a far jump.
Detective work and patch by: Adrian Steinmann <ast@marabu.ch>
- improve sysinfo(2) syscall;
- add dummy fadvise64(2) syscall;
- add dummy *xattr(2) family of syscalls;
- add protos for the syscalls 222-225, 238-249 and 253-267;
- add exit_group(2) syscall, which is currently just wired to exit(2).
Obtained from: OpenBSD
MFC after: 2 weeks
Its restoration in rev.1.102 was mistranslated to the equivalent of
setsofttty() in rev.1.105. This increased overheads by causing a
context switch to the SWI handler after almost every interrupt. The
increase was approx. 50% on a Celeron 366 (from 23 usec to 34 usec
per interrupt).
I'm having bad luck with different parts of the sys tree being checked
out at slightly different times. Back it out, noting it doesn't cause
harm in any case. Tinderbox also makes these things more fun.
of newfs, to signify the newfs operation has not yet completed. Re-
write the superblock with the correct magic number once all of the
cylinder groups have been created to show the operation has finished.
Sponsored by: St. Bernard Software
physical mapping.
- Move the sf_buf API to its own header file; make struct sf_buf's
definition machine dependent. In this commit, we remove an
unnecessary field from struct sf_buf on the alpha, amd64, and ia64.
Ultimately, we may eliminate struct sf_buf on those architecures
except as an opaque pointer that references a vm page.
sure to sooptcopyin() the (struct mac) so that the MAC Framework
knows which label types are being requested. This fixes process
queries of socket labels.
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
opt_ddb.h. These changes expand green's work of including
opt_global.h to prefer opt files in the kernel directory. Further
refinement might be needed, but I think this is good.
Note: While this is a step on the path to moving the meta information
about modules into the config files, it doesn't actually do that. It
just pulls in the opt files in a way that allows one to build
'generic' modules outside the tree.
disposing fifo resources in fifo_cleanup() instead using of
"vp->v_usecount == 1". There may be other references to the vnode, for
instance by nullfs, at the time fifo_open() or fifo_close() is called,
which could cause a resource leak.
Don't bother grabbing the vnode interlock in fifo_cleanup() since it no
longer accesses v_usecount.
the nfsv4 files. It is intended to be a short-term bridge while
alfred deals with the problem in a better way (eg, don't hesitate to
back this out when the real fix comes along). I've not heard back
from alfred in a few hours and other people are hitting this problem.
Approved by: markm, rwatson, grog, murray
problem, but the spamage of consoles is really bad. Until we can get
this to be less chatty, disable it so people can boot. The badness of
the spamage is worse than the badness that it reports :-(. Once the
underlying problems have been fixed, it can be reenabled.
Approved by: kken, markm, rwatson, grog, murray
* Use the cpu_idle_hook() to do idling for C1-C3.
* Use both _CST and the FADT to detect Cx states.
* Use both _PTC and P_CNT for controlling throttling.
* Add a notify handler to detect changes in _CST and _PSS
* Call the _INI function for each processor if present. This will be
done by ACPI-CA in the future.
* Fix a bug on SMP systems where CPUs will attach multiple times if the
bus is rescan.
* Document new sysctls for controlling idling.
and remove two unneccessary variable initializations.
Make the introduction comment more clear with regard which parts of
the packet are touched.
Requested by: luigi
value as reserved for internal use in boot blocks, because RB_PAUSE
broke binary compatibility by usurping the RB_DUAL flag. Probably no
one except me has boot blocks for which this matters, since most boot
blocks based on biosboot including pc98's boot2 can't boot elf kernels,
and /boot/loader doesn't properly pass flags set by the previous stage.
reboot.h:
Also mark the historical RB_PROBEKBD flag (0x80000) as reserved for
internal use in boot blocks.
boot2.c:
Added comments to inhibit usurping of other flags.
Approved by: guido, imp
MFC after: 1 week
on non-VCHR vnodes. This fixes a panic when reading data from files on a
filesystem with a small (less than a page) block size.
PR: 59271
Reviewed by: alc
kses from the run queues. Also, on SMP, we track the transferable
count here. Threads are transferable only as long as they are on the
run queue.
- Previously, we adjusted our load balancing based on the transferable count
minus the number of actual cpus. This was done to account for the threads
which were likely to be running. All of this logic is simpler now that
transferable accounts for only those threads which can actually be taken.
Updated various places in sched_add() and kseq_balance() to account for
this.
- Rename kseq_{add,rem} to kseq_load_{add,rem} to reflect what they're
really doing. The load is accounted for seperately from the runq because
the load is accounted for even as the thread is running.
- Fix a bug in sched_class() where we weren't properly using the PRI_BASE()
version of the kg_pri_class.
- Add a large comment that describes the impact of a seemingly simple
conditional in sched_add().
- Also in sched_add() check the transferable count and KSE_CAN_MIGRATE()
prior to checking kseq_idle. This reduces the frequency of access for
kseq_idle which is a shared resource.
- missing parenthesization of some macro args
- point of do-while(0) hack defeated by putting a semicolon after while(0)
Fixed some style bugs in macros:
- not splitting the line when the macro value cannot be lined up in much
the same macros that didn't parenthesize their args
- braces around a 1-line statement
- do-while(0) hack not indented in the usual way in the same macros that
defeated its point.
complex locking and rework ip_rtaddr() to do its own rtlookup.
Adopt all its callers to this and make ip_output() callable
with NULL rt pointer.
Reviewed by: sam (mentor)
- For acpi_pci_link_entry_dump(), add a few helper functions to display
the trigger mode, polarity, and sharemode of an individual IRQ resource.
These functions are then called for both regular and extended IRQ
resources.
- In acpi_pci_link_set_irq(), use the same type of IRQ resource
(regular vs. extended) for the new current resource as the type of
the resources from _PRS.
- When routing an interrupt don't ignore extended IRQ resources. Also,
use the same type of IRQ resource (regular vs. extended) for the new
current resource when as the type of the resource from _PRS.
Tested by: peter
This fixes a dependency of mac_label.c on namespace pollution in
<vm/uma.h>.
Similarly for SYSCTL_DECL() although I had no problems with it. This
probably makes some includes of <sys/sysctl.h> bogus.
longer uses these interrupt vectors for its ISA interrupt pins, so these
entries will not be overwritten. If we get a spurious interrupt from the
ATPIC when using the APIC, it will be treated as a stray interrupt instead
of causing a panic.
