to the routing socket.
The local address on a point-to-point interface is not actually a
gateway address - despite it appearing in the second column of
netstat -r's output. Providing a gateway to an RTM_CHANGE will
currently change the route's interface so that it's using the
specified gateway - not what we want.
Patiently explained to me by: ru
interface address, blow the address away again before returning the
error.
In in_ifinit(), if we get an error from rtinit() and we've also got
a destination address, return the error rather than masking EEXISTS.
Failing to create a host route when configuring an interface should
be treated as an error.
removing it from our source tree in order to have one version
of strtod() for all arches. netbsd_strtod.c still left in source
tree until alpha folks make sure that our native strtod() works
as well as NetBSD's one.
Reviewed by: peter, bde (some time ago)
pointless and would be inadequate for SMP systems. We will rely on the
VM system's locks to serialise this for now.
* Change pmap_remove() so that if the range being removed is larger than
the number of pages mapped by the pmap, we iterate over the currently
mapped pages instead of over the virtual address range. This should
make a difference when removing large virtual address ranges from an
address space.
- New length modifiers: hh, j, t, z.
- New flag: '. Note that %'f is not yet implemented.
- Use "inf"/"nan" for efg formats, "INF"/"NAN" for EFG formats.
- Implemented %q in terms of %ll; if "quad_t" is not "long long"
%q will break.
Still to do:
- %C, %S, %lc, %ls (wide character support)
- %'f (thousands in integer portion of %f)
- %a/%A (exact hex representation of floating-point numbers)
Garrett Wollman wrote the first version of the vfprintf.c update;
Mike Barcroft wrote the first version of the printf.3 changes.
mbuf allocation fails, and fix (i hope) a couple of style bugs.
I believe these printf() are extremely dangerous because now they can
occur on every incoming packet and are not rate limited. They were
meant to warn the sysadmin about lack of resources, but now they
can become a nice way to panic your system under load.
Other drivers (e.g. the fxp driver) have nothing like this.
There is a pending discussion on putting this kind of warnings
elsewhere, and I hope we can fix this soon.
underlying unaligned bcopy) on incoming packets that are already
available (albeit unaligned) in a buffer.
The performance improvement varies, depending on CPU and memory
speed, but can be quite large especially on slow CPUs. I have seen
over 50% increase on forwarding speed on the sis driver for the
486/133 (embedded systems), which does exactly the same thing.
The behaviour is controlled by a sysctl variable, hw.dc_quick which
defaults to 1. Set it to 0 to restore the old behaviour.
After running a few experiments (in userland, though) I am convinced
that doing the m_devget() is detrimental to performance in almost
all cases.
Even if your CPU has degraded performance with misaligned data,
the bcopy() in the driver has the same overhead due to misaligment
as the one that you save in the uiomove(), plus you do one extra
copy and pollute the cache.
But more often than not, you do not even have to touch the payload,
e.g. when you are forwarding packets, and even in the often-cited
case of NFS, you often end up passing a pointer to the payload to
the disk controller.
In any case, you can play with the sysctl variable to toggle between
the two behaviours, and see if it makes a difference.
MFC-after: 3 days
STANDARDS section of the page. Add one remark there about inet_pton(3)
only understanding decimal values (in contrast to inet_aton(3) and
friends who are happy with 0ac.020.25 for 172.16.0.25).
Caught by: ru
MFC after: 2 days
only once into an array of shell variables, and then scan the array
to find entries matching the MAC address.
Associative arrays would really be handy here...
The definition of character class digit requires that only ten characters
-the ones defining digits- can be specified; alternate digits (for
example, Hindi or Kanji) cannot be specified here. However, the encoding
may vary if an implementation supports more than one encoding.
The definition of character class xdigit requires that the characters
included in character class digit are included here also and allows for
different symbols for the hexadecimal digits 10 through 15.
readability.
o Conditionalize only the SYSCTL definitions for the regression
tree, not the variables itself, decreasing the number of #ifdef
REGRESSIONs scattered in kern_mib.c, and making the code more
readable.
Sponsored by: DARPA, NAI Labs
