have alignment problems.
On small boxes (e.g. the net4501 from Soekris, featuring a 486/133)
this provides huge performance benefits: the peak forwarding rate
with avg.sized packets goes up by 50-70% because of this change
alone. Faster CPUs might benefit less from this change, but in any
case the CPU has better things to do than waste time on useless
memory-to-memory copies.
Several drivers (for Tulip-like cards) might benefit from a similar
change.
Right now the new behaviour is controlled by a sysctl variable,
hw.sis_quick which defaults to 1 (on), you can set it to 0 to
reintroduce the old behaviour (and compare the results). The
variable is only there to show how much you can gain with this
change, it will go away soon.
Also, slightly simplify the code to initialize the ring buffers,
and remove a couple of dangerous printf's which could trigger on
any packet in case of mbuf shortage.
MFC-after: 3 days
received on an interface without an IP address, try to find a
non-loopback AF_INET address to use. If that fails, drop it.
Previously, we used the address at the top of the in_ifaddrhead list,
which didn't make much sense, and would cause a panic if there were no
AF_INET addresses configured on the system.
PR: 29337, 30524
Reviewed by: ru, jlemon
Obtained from: NetBSD
respects locks. Before SMPng, one was able to call psignal()
using the "call" command, but this is no longer possible because it
does not respect locks by itself. This is very useful when one has
gotten their machine into a state where it is impossible to spawn
ps/kill or su to root.
In this case, respecting locks essentially means trying to aquire the
proc lock before calling psignal(). We can't block in the debugger,
so if trylock fails, the operation fails. This also means that we
can't use pfind(), since that will attempt to lock the process for us.
Reviewed by: jhb
idle and the driver would not detect the event, requiring userland
to cycle the interface to bring it up again.
The fix consists in adding SIS_IMR_RX_IDLE to the interrupt mask and
add a command in sis_intr() to restart the receiver when this happens.
While at it, make the test of status bits more efficient.
for passive mode data connections (PASV/EPSV -> 227/229). Well,
the actual punching happens a bit later, when the aliasing link
becomes fully specified.
Prodded by: Danny Carroll <dannycarroll@hotmail.com>
MFC after: 1 week
The problem was that the ISO9660 code wasn't opening the device prior to
issuing ioctl calls. In particular, the device must be open before
iso_get_ssector() is called in iso_mountroot().
If the device isn't opened first, the disk layer blows up due to an
uninitialized variable.
The solution was to open the device, call iso_get_ssector() and then close
it again.
The ATAPI CDROM driver doesn't have this problem because it doesn't use the
disk layer, and evidently doesn't mind if someone issues an ioctl without
first issuing an open call.
Thanks to phk for pointing me at the source of this problem.
Tested by: dirk
MFC after: 1 week
It is legal to have a device with device type 0x1f, that just means
that the device is of unknown type. Instead, only check the peripheral
qualifier when deciding whether or not to reject a device based on its
inquiry information.
Tested by: julian
MFC after: 3 weeks
Merge in the irq 0 detection. Add comment about why.
If we have irq 0, ignore it like we do irq 255. Some BIOS writers aren't
careful like they should be.
allows us to move the sio softc data structure back into sio.c and
reduce the complexity of the non sio.c sio files.
Submitted by: bde
# I didn't fix the locking issues that bruce also submitted.
loader parameter. This allows us to more easily boot on big memory
configuration machines. hw.pccbb.start_mem. Reflect this in a sysctl
so we can read it from userland.
# Note: we need a TUNABLE_ULONG to do this right. I'll add that to
# kernel.h soon.
