5.2-RELEASE TODO
From: Robert Watson (rwatson_at_FreeBSD.org)
Date: 09/29/03
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Date: Mon, 29 Sep 2003 10:00:18 -0400 (EDT) To: current@FreeBSD.org
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FreeBSD 5.2 Open Issues
Open Issues
This is a list of open issues that need to be resolved for FreeBSD 5.2. If
you have any updates for this list, please e-mail re@FreeBSD.org.
Must Resolve Issues for 5.2-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|---------------------+-----------+-----------------+--------------------|
| | | | KSE M:N threading |
| | | | support is |
| | | | reaching |
| | | | experimental yet |
| | | Julian | usable status on |
| Production-quality | In | Elischer, David | i386 for |
| M:N threading | progress | Xu, Daniel | 5.1-RELEASE. M:N |
| | | Eischen | threading should |
| | | | be productionable |
| | | | and usable on all |
| | | | platforms by |
| | | | 5.2-RELEASE. |
|---------------------+-----------+-----------------+--------------------|
| | | | Kernel bits are |
| | | | implemented but |
| KSE support for | In | | untested. Userland |
| sparc64 | progress | Jake Burkholder | bits are not |
| | | | implemented. |
| | | | Required for |
| | | | 5.2-RELEASE. |
|---------------------+-----------+-----------------+--------------------|
| | | | Kernel and |
| KSE support for | | Marcel | userland bits |
| ia64 | Complete. | Moolenaar | implemented but |
| | | | unstable. Required |
| | | | for 5.2-RELEASE. |
|---------------------+-----------+-----------------+--------------------|
| | | | Userland bits |
| | | | implemented, |
| KSE support for | In | Marcel | kernel bits not |
| alpha | progress. | Moolenaar | implemented. |
| | | | Required for |
| | | | 5.2-RELEASE. |
|---------------------+-----------+-----------------+--------------------|
| | | | Kris Kennaway |
| | | | reports high |
| | | | instability of |
| | | | 5-CURRENT on ia64 |
| | | | machines, such as |
| ia64 stability | In | Marcel | the pluto* |
| | Progress | Moolenaar | machines. These |
| | | | problems need to |
| | | | be fixed in order |
| | | | to get a |
| | | | successful package |
| | | | build. |
|---------------------+-----------+-----------------+--------------------|
| | | | A reworking of the |
| | | | sio driver is |
| | | | needed to support |
| | | | serial terminal |
| | | Marcel | devices on sparc64 |
| New serial UART | In | Moolenaar, | and ia64 |
| framework | progress | Warner Losh | platforms, among |
| | | | others. This is |
| | | | also an enabler |
| | | | for syscons |
| | | | support on |
| | | | sparc64. |
|---------------------+-----------+-----------------+--------------------|
| | | | FAST_IPSEC |
| | | | currently cannot |
| | | | be used directly |
| | | | with the KAME IPv6 |
| | | | implementation, |
| | | | requiring an |
| | | | additional level |
| | | | of IP tunnel |
| | | | indirection to |
| | | | protect IPv6 |
| | | | packets when using |
| | | | hardware crypto |
| FAST_IPSEC and KAME | | | acceleration. This |
| compatibility | -- | -- | issue must be |
| | | | resolved so that |
| | | | the two services |
| | | | may more easily be |
| | | | used together. |
| | | | Among other |
| | | | things, this will |
| | | | require a careful |
| | | | review of the |
| | | | handling of mbuf |
| | | | header copying and |
| | | | m_tag support in |
| | | | the KAME IPv6 |
| | | | code. |
|---------------------+-----------+-----------------+--------------------|
| | | | The FreeBSD KAME |
| | | | IPv6 code is now |
| | | | substantially |
| | | | dated with respect |
| | | | to the KAME vendor |
| KAME | In | Hajimu UMEMOTO | source. The |
| Synchronization | progress | | FreeBSD Project |
| | | | needs to take |
| | | | initiative in |
| | | | driving the merge |
| | | | of new bug fixes, |
| | | | features, et al. |
|---------------------+-----------+-----------------+--------------------|
| | | | Almost all process |
| | | | debugging tools |
| | | | have been updated |
| | | | to use non-procfs |
| | | | kernel primitives, |
| | | | with the exception |
| | | | of truss(1). As |
| | | | procfs is |
| | | | considered |
| | | | deprecated due to |
| | | | its inherent |
| truss support for | In | Robert Drehmel | security risks, it |
| ptrace | progress | | is highly |
| | | | desirable to |
| | | | update truss to |
| | | | operate in a |
| | | | post-procfs world. |
| | | | Dag-Erling |
| | | | Smorgrav had |
| | | | prototype patches; |
| | | | Robert Drehmel is |
| | | | developing and |
| | | | testing patches |
| | | | now. |
|---------------------+-----------+-----------------+--------------------|
| | | | Apple's Darwin |
| | | | operating system |
| | | | has fairly |
| | | | extensive |
| Merge of Darwin | | | improvements to |
| msdosfs, other | -- | -- | msdosfs and other |
| fixes | | | kernel services; |
| | | | these fixes must |
| | | | be reviewed and |
| | | | merged to the |
| | | | FreeBSD tree. |
|---------------------+-----------+-----------------+--------------------|
| | | | Many systems |
| | | | supporting |
| | | | POSIX.1e ACLs |
| | | | permit a minor |
| | | | violation to that |
| | | | specification, in |
| | | | which the ACL_MASK |
| | | | entry overrides |
| ACL_MASK override | In | | the umask, rather |
| of umask support in | progress | Robert Watson | than being |
| UFS | | | intersected with |
| | | | it. The resulting |
| | | | semantics can be |
| | | | useful in |
| | | | group-oriented |
| | | | environments, and |
| | | | as such would be |
| | | | very helpful on |
| | | | FreeBSD. |
|---------------------+-----------+-----------------+--------------------|
| | | | Significant parts |
| | | | of the network |
| | | | stack (especially |
| | | | IPv4 and IPv6) now |
| | | | have fine-grained |
| | | | locking of their |
| | | | data structures. |
| | | | However, it is not |
| | | | yet possible for |
| | | | the netisr threads |
| | | | to run without |
| | | | Giant, due to |
| Fine-grained | | | dependencies on |
| network stack | In | Jeffrey Hsu, | sockets, routing, |
| locking without | progress | Seigo Tanimura, | etc. A 5.2-RELEASE |
| Giant | | Sam Leffler | goal is to have |
| | | | the network stack |
| | | | running largely |
| | | | without Giant, |
| | | | which should |
| | | | substantially |
| | | | improve |
| | | | performance of the |
| | | | stack, as well as |
| | | | other system |
| | | | components by |
| | | | reducing |
| | | | contention on |
| | | | Giant. |
|---------------------+-----------+-----------------+--------------------|
| | | | Productionable |
| | | | support for the |
| | | | AMD64 platform. |
| | | | Currently, AMD64 |
| | | | runs fully in |
| | | | 32-bit emulation |
| Tier-1 Support for | In | Peter Wemm, | mode, and boots to |
| AMD64 Hammer | progress | David O'Brien | single-user in |
| | | | 64-bit mode. We |
| | | | expect full |
| | | | production support |
| | | | for the AMD64 |
| | | | architecture in |
| | | | 5.2-RELEASE. |
|---------------------+-----------+-----------------+--------------------|
| | | | Kernel modules are |
| | | | currently built |
| | | | independently from |
| | | | a kernel |
| | | | configuration, and |
| | | | independently from |
| | | | one another, |
| | | | resulting in |
| | | | substantially |
| | | | redundant |
| | | | compilation of |
| | | | objects, as well |
| | | | as the inability |
| | | | to easily manage |
| | | | compile-time |
| | | | options for kernel |
| | | | objects (such as |
| | | | MAC, PAE, etc) |
| Revised kld build | -- | -- | that may require |
| infrastructure | | | conditional |
| | | | compilation in the |
| | | | kernel modules. In |
| | | | order to improve |
| | | | build performance |
| | | | and better support |
| | | | options of this |
| | | | sort, the KLD |
| | | | build |
| | | | infrastructure |
| | | | needs to be |
| | | | revamped. Peter |
| | | | Wemm has done some |
| | | | initial |
| | | | prototyping, and |
| | | | should be |
| | | | contacted before |
| | | | starting on this |
| | | | work. |
|---------------------+-----------+-----------------+--------------------|
| | | | Currently, there |
| | | | are two classes of |
| | | | interrupt handlers |
| | | | in 5.x: fast |
| | | | interrupt handlers |
| | | | which run entirely |
| | | | in interrupt |
| | | | context, and |
| | | | heavy-weight |
| | | | handlers which |
| | | | execute in a |
| | | | full-weight kernel |
| | | | interrupt thread. |
| | | | It is possible to |
| | | | optimize interrupt |
| | | | thread context |
| | | | management such |
| | | | that a |
| | | | light-weight |
| | | | context switch is |
| | | | performed to begin |
| | | | execution of the |
| | | | interrupt thread |
| | | | in the handler |
| | | | context, and only |
| Light-weight | | | when a full-weight |
| interrupt threads, | -- | -- | context is |
| context switches | | | required (such as |
| | | | sleeping on a |
| | | | lock) is that cost |
| | | | required. This |
| | | | optimization |
| | | | should |
| | | | substantially |
| | | | improve interrupt |
| | | | latency. There are |
| | | | also additional |
| | | | kernel thread |
| | | | context switch |
| | | | optimizations that |
| | | | can be made to |
| | | | improve the |
| | | | performance of |
| | | | thread workers in |
| | | | the kernel, such |
| | | | as found in the |
| | | | network stack, |
| | | | crypto worker |
| | | | threads, and GEOM. |
| | | | Bosko Milekic has |
| | | | done substantial |
| | | | prototyping work, |
| | | | and should be |
| | | | coordinated with. |
|---------------------+-----------+-----------------+--------------------|
| | | | The existing APIC |
| | | | interrupt code |
| | | | does not support |
| Complete the APIC | | | PCI interrupt |
| PCI interrupt | In | John Baldwin | routing properly. |
| routing support | progress | | As a result, PCI |
| | | | interrupts cannot |
| | | | be routed either |
| | | | via ACPI or across |
| | | | PCI-PCI bridges. |
|---------------------+-----------+-----------------+--------------------|
| | | | Currently, gbde |
| | | | must be manually |
| | | | configured at |
| | | | run-time each time |
| | | | an encrypted disk |
| | | | device is mounted. |
| | | | This prevents easy |
| Run-time | | | integration into |
| autoconfiguration | | | /etc/fstab and |
| of GBDE and related | -- | -- | easy automated |
| transforms | | | deployment. |
| | | | Improved |
| | | | integration with |
| | | | the configuration, |
| | | | mounting, and boot |
| | | | process is |
| | | | required to make |
| | | | this feature more |
| | | | easily accessible. |
|---------------------+-----------+-----------------+--------------------|
| | | | Brian Feldman has |
| | | | submitted patches |
| | | | to improve the |
| | | | consistency of the |
| | | | pathnames passed |
| | | | into the MAC |
| MAC Framework devfs | In | Robert Watson | Framework devfs |
| path fixes | progress | | labeling entry |
| | | | points. These |
| | | | patches need to be |
| | | | thoroughly |
| | | | reviewed and |
| | | | tested, then |
| | | | merged. |
|---------------------+-----------+-----------------+--------------------|
| | | | A process cannot |
| | | | be interrupted |
| | | | while waiting on a |
| | | | lock. Fixing this |
| rpc.lockd(8) | In | Robert Watson | requires that the |
| stability | progress | | rpc code be taught |
| | | | how to deal with |
| | | | lock cancellation |
| | | | and interruption |
| | | | events. |
+------------------------------------------------------------------------+
Desired Features for 5.2-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|---------------+-------------+----------------+-------------------------|
| | | | Truss appears to |
| | | | contain a race |
| | | | condition during the |
| | | | start-up of debugging, |
| | | | which can result in |
| | | | truss failing to attach |
| | | | to the process before |
| | | | it exits. The symptom |
| | | | is that truss reports |
| | | | that it cannot open the |
| | | | procfs node supporting |
| | | | the process being |
| Race | | | debugged. A bug also |
| conditions in | Errata | Robert Drehmel | appears to exist where |
| truss | candidate | | in truss will hang if |
| | | | execve() returns |
| | | | ENOENT. A further race |
| | | | appears to exist in |
| | | | which truss will return |
| | | | "PIOCWAIT: Input/output |
| | | | error" occasionally on |
| | | | startup. The fix for |
| | | | this sufficiently |
| | | | changes process |
| | | | execution handling that |
| | | | we will defer the fix |
| | | | to post-5.0 and |
| | | | consider this errata. |
|---------------+-------------+----------------+-------------------------|
| gdb -k | | | gdb -k doesn't work on |
| support for | -- | Mark Peek | alpha |
| alpha | | | |
|---------------+-------------+----------------+-------------------------|
| | | | Currently, MAC |
| | | | protections are |
| | | | enforced only on |
| | | | locally originated file |
| | | | system operations |
| | | | (VOPs), and not on RPCs |
| | | | generated via the NFS |
| MAC support | | | server. Improvements in |
| for NFS | -- | Robert Watson | NFS server credential |
| Server | | | handling are required |
| | | | to correct this |
| | | | problem, as well as the |
| | | | introduction of new |
| | | | entry points to |
| | | | properly label NFS |
| | | | credentials and perform |
| | | | enforcement properly. |
|---------------+-------------+----------------+-------------------------|
| | | | All PCI drivers must |
| | | | use busdma for DMA; no |
| busdma in all | | | use of vtophys() will |
| PCI drivers | -- | -- | be permitted for any |
| | | | recent device driver. |
| | | | ISA drivers may be |
| | | | exempt. |
|---------------+-------------+----------------+-------------------------|
| | | | With improved support |
| | | | for threading |
| | | | primitives, support is |
| | | | now required to ease |
| GDB thread | -- | -- | debugging of threaded |
| support | | | applications. Ideally, |
| | | | this support will work |
| | | | for both libthr and |
| | | | libkse threading |
| | | | models. |
|---------------+-------------+----------------+-------------------------|
| | | | Prebinding reduces |
| | | | executable startup time |
| | | | by lowering the expense |
| | | | of symbol lookup, |
| | | | binding and relocation. |
| | | | This is accomplished by |
| | | | a prebinding data file |
| | | | or ELF segment that |
| | | | contains intermediate |
| | | | lookup results allowing |
| | | | fast symbol binding and |
| | | | relocation, provided |
| Per object | | | that dependent objects |
| ELF | In progress | Matthew Dodd | remain unchanged since |
| Prebinding | | | the prebinding |
| support | | | information was |
| | | | generated. |
| | | | |
| | | | The benefits of |
| | | | prebinding are realized |
| | | | when running |
| | | | executables that use a |
| | | | large (>10) number of |
| | | | shared libraries. C++ |
| | | | applications also |
| | | | benefit as they contain |
| | | | a large number of |
| | | | relocations. |
+------------------------------------------------------------------------+
Documentation items that must be resolved for 5.2
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|---------------+--------+---------------+-------------------------------|
| Bluetooth | | | It'd be nice to have some |
| documentation | -- | Pav Lucistnik | Bluetooth documentation for |
| | | | the Handbook. |
+------------------------------------------------------------------------+
Testing focuses for 5.2-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|---------------+----------+----------------+----------------------------|
| | | | New ATA model has arrived. |
| ATA driver | | | Much testing is needed to |
| structural | Complete | So/ren Schmidt | ensure no regressions. |
| improvements, | | | ATAPI-CAM seems especially |
| MPsafety | | | fragile, more testing is |
| | | | encouraged. |
+------------------------------------------------------------------------+
----------------------------------------------------------------------
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Last modified: 2003/09/01 06:09:17
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