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Date:      Thu, 29 May 2003 10:00:13 -0400 (EDT)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        current@FreeBSD.org
Subject:   5.2-RELEASE TODO
Message-ID:  <200305291400.h4TE0DmR019832@fledge.watson.org>

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This is an automated bi-weekly mailing of the FreeBSD 5.2 open issues list.
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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.

  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.        |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | Currently, the MD   |
   |                     |          |                 | elements of KSE are |
   |                     |          |                 | present only for    |
   |                     |          |                 | the i386 platform,  |
   |                     |          |                 | limiting use of KSE |
   |                     |          |                 | to the i386         |
   |                     |          |                 | platform. It is     |
   |                     |          |                 | highly desirable to |
   | KSE support for     |          | Jake            | make KSE available  |
   | sparc64, alpha,     | --       | Burkholder, --, | on non-i386         |
   | ia64                |          | --              | platforms for       |
   |                     |          |                 | 5.1-RELEASE so that |
   |                     |          |                 | KSE can see more    |
   |                     |          |                 | broad exposure, and |
   |                     |          |                 | the performance     |
   |                     |          |                 | benefits of KSE can |
   |                     |          |                 | be visible to users |
   |                     |          |                 | of the 64-bit       |
   |                     |          |                 | FreeBSD             |
   |                     |          |                 | architectures.      |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | ia64 serial console |
   |                     |          |                 | support is reported |
   |                     |          |                 | to not be           |
   |                     |          |                 | functional on HP    |
   |                     | In       | Marcel          | Itanium2 platforms. |
   | ia64 sio support    | progress | Moolenaar,      | A reworking of the  |
   |                     |          | Warner Losh     | sio driver to       |
   |                     |          |                 | improve platform    |
   |                     |          |                 | independence and    |
   |                     |          |                 | bus handling is     |
   |                     |          |                 | likely needed.      |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | 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                |          |                 | KAME vendor source. |
   | Synchronization     | --       | --              | 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.               |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | Port syscons to     |
   |                     |          |                 | sparc64. Add device |
   |                     |          |                 | drivers for sun     |
   |                     |          |                 | mice and keyboards. |
   |                     |          |                 | Allow for more than |
   | sparc64 adaptation  | In       |                 | 3 bits of           |
   | of syscons          | progress | Jake Burkholder | background colour   |
   |                     |          |                 | in syscons. Creator |
   |                     |          |                 | frame buffer device |
   |                     |          |                 | driver. In the      |
   |                     |          |                 | process, generally  |
   |                     |          |                 | improve the MI-ness |
   |                     |          |                 | of syscons.         |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | Many systems        |
   |                     |          |                 | supporting POSIX.1e |
   |                     |          |                 | ACLs permit a minor |
   |                     |          |                 | violation to that   |
   |                     |          |                 | specification, in   |
   |                     |          |                 | which the ACL_MASK  |
   |                     |          |                 | entry overrides the |
   | ACL_MASK override   | In       |                 | umask, rather than  |
   | of umask support in | progress | Robert Watson   | being intersected   |
   | UFS                 |          |                 | 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               |          |                 | 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.              |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | Move ATA commands   |
   |                     |          |                 | into requests, so   |
   |                     |          |                 | that they can be    |
   |                     |          |                 | linked together,    |
   |                     |          |                 | centralize request  |
   |                     |          |                 | queue management    |
   |                     |          |                 | permitting direct   |
   | ATA driver          |          |                 | DMA of ATA          |
   | structural          | In       | So/ren Schmidt  | commands. These     |
   | improvements,       | progress |                 | architectural       |
   | MPsafety            |          |                 | changes will also   |
   |                     |          |                 | facilitate complete |
   |                     |          |                 | MP-safety of the    |
   |                     |          |                 | ATA driver suite,   |
   |                     |          |                 | and dramatically    |
   |                     |          |                 | improve support for |
   |                     |          |                 | Promise RAID        |
   |                     |          |                 | controllers.        |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | 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.        |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | To properly support |
   |                     |          |                 | AMD64, a compiler   |
   |                     |          |                 | upgrade is          |
   |                     |          |                 | required; however,  |
   |                     |          |                 | the new GCC 3.3 has |
   |                     |          | David O'Brien   | a substantial       |
   | GCC 3.3 upgrade     | In       | Alexander       | number of new       |
   |                     | progress | Kabaev          | warnings that will  |
   |                     |          |                 | disrupt application |
   |                     |          |                 | support, preventing |
   |                     |          |                 | inclusion in        |
   |                     |          |                 | 5.1-RELEASE. This   |
   |                     |          |                 | is a must-have 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 (such as    |
   | Revised kld build   | --       | --              | MAC, PAE, etc) that |
   | infrastructure      |          |                 | 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, and only   |
   | Light-weight        |          |                 | when a full-weight  |
   | interrupt threads,  | --       | --              | context is required |
   | context switches    |          |                 | (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.   |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | With the            |
   |                     |          |                 | introduction of     |
   |                     |          |                 | extensive PAM and   |
   |                     |          |                 | NSS support in      |
   |                     |          |                 | 5.0-RELEASE and     |
   |                     |          |                 | 5.1-RELEASE,        |
   | Support for a fully | In       | Gordon Tetlow   | support for a fully |
   | dynamic system      | progress |                 | dynamically linked  |
   |                     |          |                 | system is desired.  |
   |                     |          |                 | Gordon Tetlow has   |
   |                     |          |                 | in-progress patches |
   |                     |          |                 | to post for review  |
   |                     |          |                 | following the 5.1   |
   |                     |          |                 | release cycle.      |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | Existing interrupt  |
   |                     |          |                 | routing code is not |
   |                     |          |                 | able to correctly   |
   |                     |          |                 | determine the       |
   |                     |          |                 | interrupt routing   |
   | Complete the APIC   |          |                 | of PCI devices that |
   | PCI interrupt       | --       | --              | are behind          |
   | routing support     |          |                 | PCI-to-PCI bridges  |
   |                     |          |                 | when using APIC     |
   |                     |          |                 | Full Table routing  |
   |                     |          |                 | (with non-legacy    |
   |                     |          |                 | interrupts above    |
   |                     |          |                 | 15).                |
   |---------------------+----------+-----------------+---------------------|
   |                     |          |                 | 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 related | --       | --              | automated           |
   | transforms          |          |                 | deployment.         |
   |                     |          |                 | Improved            |
   |                     |          |                 | integration with    |
   |                     |          |                 | the configuration,  |
   |                     |          |                 | mounting, and boot  |
   |                     |          |                 | process is required |
   |                     |          |                 | to make this        |
   |                     |          |                 | feature more easily |
   |                     |          |                 | accessible.         |
   +------------------------------------------------------------------------+

  Desired Features for 5.2-RELEASE

   +------------------------------------------------------------------------+
   |     Issue      | Status |  Responsible  |         Description          |
   |----------------+--------+---------------+------------------------------|
   |                |        |               | Kris Kennaway reports        |
   |                |        |               | deadlocks involving the use  |
   |                |        |               | of nullfs in the bento       |
   |                |        |               | environment: buildworld -j4  |
   |                |        |               | with src and obj mounted via |
   | nullfs         | --     | --            | nullfs; the gcc processes    |
   | deadlocks      |        |               | eventually deadlocked in the |
   |                |        |               | ufs state. DDB traceback     |
   |                |        |               | showed two different         |
   |                |        |               | codepaths. I've just         |
   |                |        |               | repeated this, so the bug    |
   |                |        |               | still exists.                |
   |----------------+--------+---------------+------------------------------|
   | gdb -k support | --     | Mark Peek     | gdb -k doesn't work on alpha |
   | for alpha      |        |               |                              |
   |----------------+--------+---------------+------------------------------|
   |                |        |               | Currently, MAC protections   |
   |                |        |               | are enforced only on locally |
   |                |        |               | originated file system       |
   |                |        |               | operations (VOPs), and not   |
   |                |        |               | on RPCs generated via the    |
   |                |        |               | NFS server. Improvements in  |
   | MAC support    | --     | Robert Watson | NFS server credential        |
   | for NFS 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 use of    |
   | busdma in all  | --     | --            | vtophys() will be permitted  |
   | PCI drivers    |        |               | for any recent device        |
   |                |        |               | driver. ISA drivers may be   |
   |                |        |               | exempt.                      |
   +------------------------------------------------------------------------+

  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     |
   +------------------------------------------------------------------------+

     ----------------------------------------------------------------------

    freebsd-qa@FreeBSD.ORG
    Copyright (c) 1995-2003 The FreeBSD Project. All rights reserved.
    Last modified: 2003/05/27 20:03:55



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