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%includes;
%developers;
N/A">
Done">
In progress">
Needs testing">
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&header;
This is the beginning of a list of open issues that need to be worked on
or resolved for FreeBSD 5.4. If you have any updates for this list, please
e-mail re@FreeBSD.org. The feature list for 5.4 is still a work in
progress, so items may be added, removed, or modified before we're done.
Issue |
Status |
Responsible |
Description |
Update sysinstall to handle separate packages CD |
&status.wip; |
&a.jhb; |
Avoid the need for a disc1-gnome/disc1-kde as was done for 4.11 |
Entropy harvesting optimizations |
&status.wip; |
&a.rwatson;, &a.markm; |
Entropy harvesting in the interrupt and incoming packet paths
currently involves a large number of mutex operations. In order to
improve performance, it is desirable to reduce the number of mutex
operations substantially. Improvements in the harvesting locking
scheme have been merged to 6.x, but are considered too risky at this
stage to be merged to 5.x until after 5.3. |
sparc64: no serial console on fhc(4) based machines |
&status.wip; |
&a.marcel; |
Now that ofw_console(4) is disabled by default on sparc64, certain
machines, like the E4x00 don't have a serial console anymore. These
machines typically have a fhc(4) bus, onto which the serial ports
attach. The fix is two-fold: 1) properly add decoding of the fhc(4)
bus addresses for low-level consoles and 2) have puc(4) attach to the
fhc(4) bus. Patches are being tested. |
File descriptor locking |
&status.wip; |
&a.jeff; |
File descriptor locking needs to be merged back from HEAD. |
busdma fixes |
&status.wip; |
&a.scottl; |
More work is needed on busdma to fix bounce buffer problems. |
Issue |
Status |
Responsible |
Description |
ACL_MASK override of umask support in UFS |
&status.new; |
&a.rwatson; |
Many systems supporting POSIX.1e ACLs permit a minor violation
to that specification, in which the ACL_MASK entry overrides the
umask, rather than being intersected with it. The resulting
semantics can be useful in group-oriented environments, and as
such would be very helpful on FreeBSD. |
KAME IPSEC without the Giant Lock |
&status.wip; |
&a.gnn; |
Currently, the KAME IPSEC implementation contains inadequate locking
to operate without the Giant lock over the network stack, forcing
kernels compiled with the KAME IPSEC implementation (not FAST_IPSEC)
to run the network stack with the Giant lock, reducing parallelism,
increasing lock contention, and increasing latency by preventing
preemption. For 5.4-RELEASE, it is desirable to complete the locking
work for KAME IPSEC so that it can run without the Giant lock. |
All Network Interface Drivers MPSAFE |
&status.wip; |
-- |
Currently, some network interface drivers are not safe without the
Giant lock due to missing synchronization. These drivers are protected
by running non-INTR_MPSAFE and with the IFF_NEEDSGIANT flag set, which
cause interrupt threads to acquire the Giant lock before executing the
driver's interrupt handler, and to perform if_start (interface
transmit start) asynchronously once the Giant lock can be acquired.
This results in these drivers performing less well due to increased
lock contention, decreased ability to preempt, and latency associated
with asynchronous launching of latency-critical events. For 5.4, all
network drivers should be able to operate without the Giant lock. |
NetIPX without the Giant Lock |
&status.wip; |
&a.rwatson; |
Currently, the IPX/SPX (netipx) implementation contains inadequate
locking to operate without the Giant lock over the network stack,
forcing kernels compiled with IPX support to run the network stack
with the Giant lock, reducing parallelism, increasing lock contention,
and increasing latency by preventing preemption. For 5.4-RELEASE, it
is desirable to complete the locking work for IPX so that it can run
without the Giant lock. |
Fix regression in file(1) |
-- |
-- |
The new version of file(1) does not cross-build properly. If
sparc64 executables are built on i386 the compiled magic numbers
file that gets installed is wrong and file(1) doesn't work
properly. |
AMR driver MPSAFE |
&status.wip; |
&a.scottl; |
Making the AMR driver MPSAFE will greatly increase its performance. |
SCHED_ULE update |
&status.new; |
-- |
Many improvements have been made to the ULE scheduler in 6-CURRENT.
These should be merged back to 5.4. |
CARP support |
&status.wip; |
&a.glebius; |
Common Address Redundancy Protocol allows multiple hosts on the same
local network to share a set of IP addresses. |