Date: Sat, 15 Nov 2003 10:00:24 -0500 (EST) From: Robert Watson <rwatson@FreeBSD.org> To: current@FreeBSD.org Subject: 5.2-RELEASE TODO Message-ID: <200311151500.hAFF0Oc6034649@fledge.watson.org>
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FreeBSD 5.2.
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.
Show stopper defects for 5.2-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|--------------------+--------+-------------+----------------------------|
| Panic when | | | The panic reported in PR |
| rebuilding | -- | -- | kern/58228 must be fixed. |
| ata-raid arrays | | | |
|--------------------+--------+-------------+----------------------------|
| | | | Kris Kennaway reports that |
| | | | Alpha packages builds are |
| pipe/VM corruption | -- | -- | being silently corrupted |
| on Alpha | | | and suspects pipe and vm |
| | | | issues. This must be |
| | | | investigated and resolved. |
|--------------------+--------+-------------+----------------------------|
| | | | The panic reported in PR |
| Lingering PSE | -- | -- | kern/58787 is likely |
| instability | | | related to PSE problems |
| | | | and must be fixed. |
+------------------------------------------------------------------------+
Required features for 5.2-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|-----------------+--------------+---------------+-----------------------|
| | | | Kernel and userland |
| | | | bits are implemented |
| KSE support for | In progress | Jake | but untested and |
| sparc64 | | Burkholder | known to be |
| | | | incomplete. Required |
| | | | for 5.2-RELEASE. |
|-----------------+--------------+---------------+-----------------------|
| | | | Userland bits |
| KSE support for | | Marcel | implemented, kernel |
| alpha | In progress. | Moolenaar | bits not implemented. |
| | | | Required for |
| | | | 5.2-RELEASE. |
|-----------------+--------------+---------------+-----------------------|
| | | | 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 |
| Fine-grained | | | without Giant, due to |
| network stack | | | dependencies on |
| locking without | In progress | Sam Leffler | sockets, routing, |
| Giant | | | etc. A 5.2-RELEASE |
| | | | 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. |
|-----------------+--------------+---------------+-----------------------|
| | | | Brian Feldman has |
| | | | submitted patches to |
| | | | improve the |
| | | | consistency of the |
| MAC Framework | | | pathnames passed into |
| devfs path | In progress | Robert Watson | the MAC Framework |
| fixes | | | devfs labeling entry |
| | | | points. These patches |
| | | | need to be thoroughly |
| | | | reviewed and tested, |
| | | | then merged. |
|-----------------+--------------+---------------+-----------------------|
| | | | Many systems |
| | | | supporting POSIX.1e |
| | | | ACLs permit a minor |
| | | | violation to that |
| | | | specification, in |
| | | | which the ACL_MASK |
| ACL_MASK | | | entry overrides the |
| override of | In progress | Robert Watson | umask, rather than |
| umask support | | | being intersected |
| in UFS | | | with it. The |
| | | | resulting semantics |
| | | | can be useful in |
| | | | group-oriented |
| | | | environments, and as |
| | | | such would be very |
| | | | helpful on FreeBSD. |
+------------------------------------------------------------------------+
Desired features for 5.2-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|--------------------+-----------+----------------+----------------------|
| | | | 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 |
| FAST_IPSEC and | -- | -- | crypto acceleration. |
| KAME compatibility | | | This 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 | In | | KAME vendor source. |
| Synchronization | progress | Hajimu UMEMOTO | The 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 |
| truss support for | In | | its inherent |
| ptrace | progress | Robert Drehmel | security risks, it |
| | | | 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. |
|--------------------+-----------+----------------+----------------------|
| | | | Productionable |
| | | | support for the |
| | | | AMD64 platform. It |
| | | | currently meets most |
| Tier-1 Support for | In | Peter Wemm, | of the requirements |
| AMD64 Hammer | progress | David O'Brien | for the Tier-1 |
| | | | classification, but |
| | | | a formal ruling must |
| | | | be made in time for |
| | | | 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 |
| Revised kld build | -- | -- | (such as MAC, PAE, |
| infrastructure | | | etc) that may |
| | | | require 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, |
| Light-weight | | | and only when a |
| interrupt threads, | -- | -- | full-weight context |
| context switches | | | is 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. |
|--------------------+-----------+----------------+----------------------|
| | | | 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 easy |
| of GBDE and | | | automated |
| related transforms | | | deployment. Improved |
| | | | integration with the |
| | | | configuration, |
| | | | mounting, and boot |
| | | | process is required |
| | | | to make this feature |
| | | | more easily |
| | | | accessible. |
|--------------------+-----------+----------------+----------------------|
| | | | A process cannot be |
| | | | interrupted while |
| | | | waiting on a lock. |
| rpc.lockd(8) | In | | Fixing this requires |
| stability | progress | Robert Watson | that the RPC code be |
| | | | taught how to deal |
| | | | with lock |
| | | | cancellation and |
| | | | interruption events. |
|--------------------+-----------+----------------+----------------------|
| | | | 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 |
| | | | debugged. A bug also |
| Race conditions in | Errata | Robert Drehmel | appears to exist |
| truss | candidate | | where 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 support for | -- | Mark Peek | gdb -k doesn't work |
| alpha | | | on alpha |
|--------------------+-----------+----------------+----------------------|
| | | | Currently, MAC |
| | | | protections are |
| | | | enforced only on |
| | | | locally originated |
| | | | file system |
| | | | operations (VOPs), |
| | | | and not on RPCs |
| | | | generated via the |
| | | | NFS server. |
| MAC support for | | | Improvements in NFS |
| NFS Server | -- | Robert Watson | server credential |
| | | | 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 use of vtophys() |
| busdma in all PCI | -- | -- | will be permitted |
| drivers | | | for any recent |
| | | | device driver. ISA |
| | | | drivers may be |
| | | | exempt. |
|--------------------+-----------+----------------+----------------------|
| | | | With improved |
| | | | support for |
| | | | threading |
| | | | primitives, support |
| | | | is now required to |
| | | | ease debugging of |
| GDB thread support | -- | -- | threaded |
| | | | 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 that |
| Per object ELF | In | | dependent objects |
| Prebinding support | progress | Matthew Dodd | remain unchanged |
| | | | since the prebinding |
| | | | 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. |
|--------------------+-----------+----------------+----------------------|
| | | | The LOR reported in |
| | | | PR kern/55175 needs |
| filedesc LOR | -- | -- | to be fixed. |
| | | | Filedesc locking |
| | | | needs to be heavily |
| | | | reviewed in general. |
+------------------------------------------------------------------------+
Documentation items desired for 5.2
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|---------------+-------------+---------------+--------------------------|
| | | Pav Lucistnik | It'd be nice to have |
| Bluetooth | Complete | / Maksim | some Bluetooth |
| documentation | | Yevmenkin | documentation for the |
| | | | Handbook. |
|---------------+-------------+---------------+--------------------------|
| | | | The Early Adopters Guide |
| | | | needs to be revised, |
| Revise EAG | -- | Bruce A. Mah | hopefully for the last |
| | | | time, to reflect the |
| | | | state of 5.2. |
|---------------+-------------+---------------+--------------------------|
| | | | Ongoing project to |
| | | | remove redundancy in |
| | | | documentation by |
| Trim Hardware | In progress | Bruce A. Mah | removing lists of |
| Notes | | | specific devices from |
| | | | the hardware notes and |
| | | | pointing readers to |
| | | | driver manpages. |
+------------------------------------------------------------------------+
Testing focuses for 5.2-RELEASE
+------------------------------------------------------------------------+
| Issue | Status | Responsible | Description |
|-------------------+----------+-----------------+-----------------------|
| | | | The PCM audio |
| | | | framework and device |
| | | | drivers have been |
| | | | locked and free of |
| | | | Giant for quite a |
| | | | while, but LOR |
| PCM locking and | | | problems persist |
| performance | Complete | -- | along with reports of |
| issues | | | poor audio |
| | | | performance under |
| | | | load. These problems |
| | | | are believed to have |
| | | | been corrected, but |
| | | | more testing is |
| | | | desired. |
|-------------------+----------+-----------------+-----------------------|
| | | | New ATA model has |
| ATA driver | | | arrived, supporting |
| structural | | | fine-grained locking, |
| improvements, | Complete | So/ren Schmidt | and more. Much |
| MPsafety | | | testing is needed to |
| | | | ensure no |
| | | | regressions. |
|-------------------+----------+-----------------+-----------------------|
| | | | Sysinstall and |
| GPT support for | | Marcel | libdisk has been |
| sysinstall | Complete | Moolenaar | overhauled to support |
| | | | the GPT partition |
| | | | scheme used on ia64. |
|-------------------+----------+-----------------+-----------------------|
| | | | Interrupt routing on |
| | | | ia32 has been |
| Complete the APIC | | | completely re-written |
| PCI interrupt | Complete | John Baldwin | to support ACPI hints |
| routing support | | | for PCI interrupt |
| | | | routing, along with |
| | | | ACPI hints for CPU |
| | | | enumeration. |
|-------------------+----------+-----------------+-----------------------|
| | | | Performing a |
| | | | crashdump on an ATA |
| ATAng crashdump | | So/ren Schmidt, | device can result in |
| causes disk | Complete | Tor Egge | a corrupted MBR |
| corruption | | | record. Tor has a |
| | | | possible patch for |
| | | | this. |
+------------------------------------------------------------------------+
----------------------------------------------------------------------
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Last modified: 2003/11/13 05:05:43
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