This is an automated weekly mailing of the FreeBSD 5.3 open issues list. The live version of this list is available at: http://www.FreeBSD.org/releases/5.3R/todo.html Automated mailing of this list will continue through the release of FreeBSD 5.3 FreeBSD 5.3 Open Issues Open Issues This is a list of open issues that need to be resolved for FreeBSD 5.3. If you have any updates for this list, please e-mail re_at_FreeBSD.org. Show stopper defects for 5.3-RELEASE +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |--------------------+-------------+-------------+-----------------------| | | | | PREEMPTION appears to | | | | | increase the chances | | | | | of triggering a race | | | | | condition in the | | | | | thread context | | PREEMPTION-related | | Scott Long, | management and | | hangs involving | In progress | Julian | scheduling code. | | threads | | Elischer | Patches to mitigate | | | | | the problem have been | | | | | developed, with | | | | | on-going work to come | | | | | up with the correct | | | | | solution prior to | | | | | 5.3. | |--------------------+-------------+-------------+-----------------------| | | | | Jun Kuriyama has | | | | | reported problems | | | | | with NFS over IPv6 | | | | | not functioning | | | | | correctly as of the | | | | | improved NFS support | | | | | for disconnection | | NFS over IPv6 | | | changes. Doug White | | problems | In progress | Doug White | has tracked down the | | | | | source of the problem | | | | | (EMSGSIZE being | | | | | returned by IPv6 UDP | | | | | send routine due to | | | | | fragmentation), and | | | | | is currently | | | | | exploring possible | | | | | fixes. | |--------------------+-------------+-------------+-----------------------| | | | | There are reports of | | | | | applications wedging | | | | | in poll() and | | | | | select() while | | | | | running the network | | | | | stack without the | | | | | Giant lock. A recent | | | | | sleepq change appears | | | | | to have caused some | | poll()/select() | | | of the observed | | application wedge | | Robert | problems to go away | | reports with | In progress | Watson | (others are difficult | | debug.mpsafenet=1 | | | to test for due to | | | | | recent SMP | | | | | instability). | | | | | uipc_socket.c:1.211 | | | | | appears to correct | | | | | this race in the CVS | | | | | HEAD (6.x), but the | | | | | fix is currently in a | | | | | waiting period to be | | | | | merged back to | | | | | RELENG_5. | |--------------------+-------------+-------------+-----------------------| | | | | ether_input() calls | | | | | random_harvest() on | | | | | the mbuf after it has | | | | | been handed off to | | | | | ether_demux(), at | | ether_input() may | | | which point it may | | harvest entropy | In progress | Mark Murray | have been free()'d | | from free()'d mbuf | | | back to the mbuf | | | | | allocator. It also | | | | | passes in a pointer | | | | | to the mbuf itself, | | | | | rather than ethernet | | | | | frame header. | |--------------------+-------------+-------------+-----------------------| | | | | Kris Kennaway has | | | | | reported problems | | | | | with boot time | | | | | panic's, mutex Giant | | boot time panic | Not done | - | not owned at | | | | | kern/vfs_subr.c:1365. | | | | | See "Re: 5.3-RELEASE | | | | | TODO" thread in | | | | | -current_at_. | +------------------------------------------------------------------------+ Required features for 5.3-RELEASE +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |-----------------+-------------+--------------+-------------------------| | BIND9 import | In progress | Doug Barton | BIND9 must be imported | | into 5-CURRENT | | | for 5.3-RELEASE. | |-----------------+-------------+--------------+-------------------------| | | | | Kernel bits | | KSE support for | | | implemented, userland | | sparc64 | -- | -- | not implemented. | | | | | Required for | | | | | 5.3-RELEASE. | |-----------------+-------------+--------------+-------------------------| | | | | With improved support | | | | | for threading | | | | | primitives, support is | | | | David Xu, | now required to ease | | GDB thread | In progress | Marcel | debugging of threaded | | support | | Moolenaar | applications. Ideally, | | | | | this support will work | | | | | for both libthr and | | | | | libkse threading | | | | | models. | |-----------------+-------------+--------------+-------------------------| | | | | Currently, two | | | | | schedulers are present: | | | | | SCHED_ULE (default), an | | | | | SMP-optimized scheduler | | | | | created as part of | | | | | SMPng, and SCHED_4BSD, | | | | | an SMP-adapted version | | | | | of the original 4BSD | | | | | scheduler. They have | | | | | quite different | | | | | performance properties, | | | | | with ULE providing | | | | | strong interactivity | | | | | characteristics, and | | Scheduler | | | performing quite well | | cleanup and | In progress | -- | in a number of | | resolution | | | benchmarks, and 4BSD | | | | | showing greater | | | | | strength in IPC | | | | | intensive user space | | | | | benchmarks, such as | | | | | databases. One of these | | | | | schedulers must be the | | | | | default for 5.3, and | | | | | whichever one it is, it | | | | | requires careful | | | | | measurement, analysis, | | | | | and optimization before | | | | | the release in order to | | | | | address its | | | | | deficiencies. | |-----------------+-------------+--------------+-------------------------| | | | | There have been several | | | | | reports that growfs(8) | | | | | works improperly with | | Reports of UFS2 | | | large disk sizes, and | | "large disk" | In progress | Scott Long | other size-related nits | | problems | | | in the current disk and | | | | | label management tool | | | | | set. These must be | | | | | resolved for | | | | | 5.3-RELEASE. | |-----------------+-------------+--------------+-------------------------| | | | | Synaptics updates to | | Synaptics | | | the psm(4) driver have | | touchpad | In progress | Philip Paeps | resulted in poor | | problems | | | interactivity for taps | | | | | and button press events | | | | | for some users. | |-----------------+-------------+--------------+-------------------------| | | | | Entropy harvesting in | | | | | the interrupt and | | | | | incoming packet paths | | | | | currently involves a | | | | | large number of mutex | | | | | operations. In order to | | | | | improve performance, it | | Entropy | | Robert | is desirable to reduce | | harvesting | In progress | Watson, | the number of mutex | | optimizations | | Mark Murray | operations | | | | | substantially. Work is | | | | | in progress to improve | | | | | the harvesting code | | | | | along these lines, but | | | | | has not yet been | | | | | properly measured, and | | | | | therefore not yet | | | | | merged to CVS. | +------------------------------------------------------------------------+ Desired features for 5.3-RELEASE +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |------------------+-------------+----------------+----------------------| | | | | 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 | | | | | security risks, it | | truss support | | | is highly desirable | | for ptrace | -- | -- | to update truss to | | | | | operate in a | | | | | post-procfs world. | | | | | Dag-Erling Smorgrav | | | | | had prototype | | | | | patches; | | | | | Robert Drehmel is | | | | | developing and | | | | | testing patches now. | | | | | Support for system | | | | | call tracing has | | | | | been added to | | | | | ptrace(). | |------------------+-------------+----------------+----------------------| | | | | FAST_IPSEC currently | | | | | cannot be used | | | | | directly with the | | | | | KAME IPv6 | | | | | implementation, | | | | | requiring an | | | | | additional level of | | | | | IP tunnel | | | | | indirection to | | | | | protect IPv6 packets | | FAST_IPSEC and | | | when using hardware | | KAME | Not done | -- | crypto acceleration. | | 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. | |------------------+-------------+----------------+----------------------| | | | | A process cannot be | | | | | interrupted while | | | | | waiting on a lock. | | rpc.lockd(8) | | | Fixing this requires | | stability | -- | -- | that the RPC code be | | | | | taught how to deal | | | | | with lock | | | | | cancellation and | | | | | interruption events. | |------------------+-------------+----------------+----------------------| | | | | 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 | | Revised kld | | | for kernel objects | | build | Not done | Peter Wemm | (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. | |------------------+-------------+----------------+----------------------| | | | | Apple's Darwin | | | | | operating system has | | | | | fairly extensive | | Merge of Darwin | | | improvements to | | msdosfs, other | Not done | -- | msdosfs and other | | fixes | | | kernel services; | | | | | these fixes must be | | | | | reviewed and merged | | | | | to the FreeBSD tree. | |------------------+-------------+----------------+----------------------| | | | | 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 | Errata | Robert Drehmel | appears to exist | | in 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. | |------------------+-------------+----------------+----------------------| | | | | Truss appears to | | | | | have another | | | | | problem. It is | | | | | repeatable by | | | | | running "truss -f | | More truss | Not done | -- | fsck -p /", | | problems | | | suspending it with | | | | | ^Z, and then killing | | | | | truss. It will leave | | | | | behind the fsck | | | | | processes which will | | | | | be unkillable. | |------------------+-------------+----------------+----------------------| | | | | 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 | Not done | Robert Watson | umask, rather than | | umask support in | | | being intersected | | UFS | | | with it. The | | | | | resulting semantics | | | | | can be useful in | | | | | group-oriented | | | | | environments, and as | | | | | such would be very | | | | | helpful on FreeBSD. | |------------------+-------------+----------------+----------------------| | | | | The LOR reported in | | | | | PR kern/55175 needs | | filedesc LOR | Not done | -- | to be fixed. | | | | | Filedesc locking | | | | | needs to be heavily | | | | | reviewed in general. | |------------------+-------------+----------------+----------------------| | | | | 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 | Not done | 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 | In progress | -- | will be permitted | | PCI drivers | | | for any recent | | | | | device driver. ISA | | | | | drivers may be | | | | | exempt. | |------------------+-------------+----------------+----------------------| | | | | Userland bits | | KSE support for | In progress | Marcel | implemented, kernel | | alpha | | Moolenaar | bits not | | | | | implemented. | |------------------+-------------+----------------+----------------------| | | | | For kernel API/ABI | | | | | compatibility | | | | | reasons, it would be | | CAM locking | In progress | Scott Long, | desirable to have | | | | Justin Gibbs | the CAM locking | | | | | strategy determined | | | | | and loosely | | | | | implemented for 5.3. | |------------------+-------------+----------------+----------------------| | | | | When running syscons | | | | | on an Ultra-30 with | | | | | Creator-3D typing | | | | | characters on the | | | | | keyboard produces | | | | | garbage. Problem | | | | | reported by Kris | | syscons not | | | Kennaway. Debugging | | working on | Not done | -- | difficult due to | | Sparc64 Ultra-30 | | | lack of this | | | | | particular | | | | | configuration among | | | | | developers and | | | | | problem isn't | | | | | present on similar | | | | | hardware (e.g. no | | | | | problem on Ultra-60 | | | | | w/Creator-3D). | +------------------------------------------------------------------------+ Documentation items that must be resolved for 5.3 +-------------------------------------------------------------------------+ | Issue | Status |Responsible| Description | |--------------+-----------+-----------+----------------------------------| | | | |The installation documentation | |i386 Floppy | |Gavin |doesn't take into account the new | |Installation |Done |Atkinson, |floppy images (with a full kernel | |Docs | |Bruce A. |split across multiple disks). This| | | |Mah |should be updated. | | | | |References: docs/70485 (closed) | |--------------+-----------+-----------+----------------------------------| | | |Simon L. |Finish removing mention of | |Finish | |Nielsen, |individual devices in the hardware| |hardware notes|In progress|Christian |notes and use auto-generated | |trimming | |Brueffer |lists, based on driver manual | | | | |pages, instead. | |--------------+-----------+-----------+----------------------------------| | | | |The snd(4) and pcm(4) drivers have| | | | |been renamed but their manual | | | | |pages are still outdated. sound(4)| | | | |has to be added and pcm(4), | | | |Ruslan |csa(4), gusc(4), sbc(4), and | |sound(4) | |Ermilov, |uaudio(4) should be revised. Other| |related manual|In progress|Simon L. |manual pages which refer to pcm(4)| |pages | |Nielsen |(if any) should possibly be | | | | |revised, too. In addition, | | | | |supported cards list needs to be | | | | |updated. | | | | |References: Manpage for snd_solo | | | | |on -doc_at_ | |--------------+-----------+-----------+----------------------------------| |Sound section | |Marc |This section is outdated, some | |in the |In progress|Fonvieille |rewrites are needed for | |Handbook | | |5.3-RELEASE. | |--------------+-----------+-----------+----------------------------------| |FDP | | |With the snd(4) and pcm(4) drivers| |documentations|Not done |-- |changes, documentations (FAQ) | |related pcm(4)| | |regarding the use of these drivers| | | | |need an update. | |--------------+-----------+-----------+----------------------------------| | | | |Xin LI pointed out that FreeBSD | | | | |5.3-RELEASE is the first stable | | | | |release on 5.X and it is | | | | |(hopefully) not for early | |Early | |Bruce A. |adopters. Early Adopter's Guide is| |Adopter's |In progress|Mah, Tom |still useful, but contains a bit | |Guide | |Rhodes |old information. Some parts of | | | | |this guide need a rewrite, and | | | | |this document should be published | | | | |as "4.X to 5.X Migration Guide", | | | | |which focuses difference between | | | | |4.X and 5.X. | |--------------+-----------+-----------+----------------------------------| | | | |Some parts are outdated. doc/70485| | | | |has been committed, but more work | | | | |is needed to reflect the | | | | |realities. bmah_at_ pointed out that | |Installation |Not done |Tom Rhodes |we should have "quick-start" | |Notes | | |installation guide for each | | | | |platform instead of the current | | | | |ones because they become too long | | | | |and difficult to be maintained. | | | | |References: doc/70485 (closed) | |--------------+-----------+-----------+----------------------------------| | | | |Update the X11 chapter of the | | | |Ken Tom, |Handbook for X.Org's X11 server. | |Xorg |Done |Marc |References: | | | |Fonvieille |books/handbook/config/chapter.sgml| | | | |rev.1.147 | |--------------+-----------+-----------+----------------------------------| | | | |Ch.11.4 and 11.5 of the Handbook | | | | |must be updated to mention the new| | | | |rc.d scripts and some ports use | |rc.d scripts |In progress|Tom Rhodes |/etc/rc.conf for their | | | | |configuration. | | | | |References: | | | | |books/handbook/config/chapter.sgml| | | | |rev.1.170 | |--------------+-----------+-----------+----------------------------------| |Handbook's | | |Chapter 8 must be updated to match| |kernel |In progress|Ceri Davies|5.3-RELEASE. | |configuration | | |References: docs/70674 (open) | |chapter | | | | |--------------+-----------+-----------+----------------------------------| | | | |Some parts of Section 14.10 are | |Handbook's |Not done |-- |outdated and are not correct for | |IPsec section | | |5.X systems. | | | | |References: ipsec on -doc_at_ | |--------------+-----------+-----------+----------------------------------| |Handbook's |Not done |-- |Vinum chapter needs to be revised | |Vinum chapter | | |for 5.X systems. | +-------------------------------------------------------------------------+ Testing focuses for 5.3-RELEASE +------------------------------------------------------------------------+ | Issue | Status | Responsible | Description | |-------------------+---------------+--------------+---------------------| | | | | SCHED_ULE provides | | | | | better | | | | | interactivity, | | | | | higher performance, | | SCHED_ULE as the | Needs testing | Jeff | and the ability to | | default scheduler | | Roberson | support pinning and | | | | | affinity. Basic HTT | | | | | scheduling policies | | | | | should be in place | | | | | for 5.3 also. | |-------------------+---------------+--------------+---------------------| | | | | KSE has matured to | | | | | the point of being | | | | | more stable and | | | | | POSIX-compliant | | | | | than the | | | | | traditional libc_r. | | | | | All Tier-1 | | | | | platforms MUST have | | KSE as the | | David Xu, | stable KSE support | | default threads | Needs testing | Daniel | for 5.3 in order to | | library | | Eischen | support a | | | | | consistent | | | | | transition. | | | | | Additionally, all | | | | | ports that depend | | | | | on the pthreads API | | | | | must be modified to | | | | | properly detect and | | | | | support the default | | | | | threading library. | |-------------------+---------------+--------------+---------------------| | | | | Binutils needs | | | | | updating in order | | Updated binutils | | David | to support new | | for all platforms | Needs testing | O'Brien | platforms, newer | | | | | GDB versions, and | | | | | Thread Local | | | | | Storage. | |-------------------+---------------+--------------+---------------------| | | | | The previous GCC | | | | | 3.3 snapshot | | | | | included | | | | | regressions in | | | | | alignment of | | | | | floating point | | gcc 3.3 floating | | | arguments, | | point alignment | Needs testing | | resulting in a | | regression | | | substantial | | | | | performance | | | | | degradation. The | | | | | recent GCC 3.4.2 | | | | | import should fix | | | | | this, but more | | | | | testing is needed. | |-------------------+---------------+--------------+---------------------| | | | | Jun Kuriyama has | | | | | reportged a failed | | | | | locking assertion | | | | | with IPv6 TCP | | in6_pcbnotify() | Needs testing | Robert | notifications. A | | panic with TCP | | Watson | patch has been | | | | | committed to the | | | | | CVS HEAD and | | | | | RELENG_5 and needs | | | | | further testing. | |-------------------+---------------+--------------+---------------------| | | | | To complete support | | | | | for thread-local | | | | | storage on FreeBSD, | | | | | per-architecture | | Per-platform | | Doug Rabson, | changes must be | | Thread-Local | Needs testing | Marcel | made. Currently | | Storage | | Moolenaar | pending platforms | | | | | are amd64, alpha, | | | | | ia64, i386, | | | | | sparc64, and | | | | | powerpc. | |-------------------+---------------+--------------+---------------------| | | | | High load on SMP | | | | | systems appears to | | | | | result in a hard | | | | | hang related to VM | | | | | IPI. Doug White has | | SMP instability | | Doug White, | prepared a | | under load | Needs testing | Alan L. Cox | candidate patch | | | | | that appears to | | | | | resolve this | | | | | instability, which | | | | | is currently in | | | | | testing for merge | | | | | to the CVS HEAD. | |-------------------+---------------+--------------+---------------------| | | | | Significant parts | | | | | of the network | | | | | stack (especially | | | | | IPv4, UNIX domain | | | | | IPC, and sockets) | | | | | now have | | | | | fine-grained | | | | | locking of their | | | | | data structures. | | | | | It's possible to | | | | | run many common | | | | | network subsystems | | | | | and services | | | | | without the Giant | | Fine-grained | | | lock. However, a | | network stack | Needs testing | Robert | number of device | | locking without | | Watson | drivers and less | | Giant | | | mainstream network | | | | | subsystems are | | | | | currently not | | | | | MPSAFE. By | | | | | 5.3-RELEASE, it is | | | | | necessary to have | | | | | the vast majority | | | | | of network code | | | | | running without | | | | | Giant, including | | | | | sockets, permitting | | | | | complete | | | | | local<->remote | | | | | delivery without | | | | | grabbing Giant. | |-------------------+---------------+--------------+---------------------| | | | | As part of the | | | | | MPSAFE network | | | | | stack work, | | | | | delivery of routing | | | | | socket messages was | | | | | moved to queued | | | | | dispatch via netisr | | | | | rather than direct | | | | | dispatch from the | | | | | routing code. | | Increased and | | | However, the risks | | configurable | | Robert | of lost routing | | netisr queue max | Needs testing | Watson | messages for | | depth for routing | | | routing daemons are | | sockets | | | high; respond by | | | | | increasing the max | | | | | depth beyond a | | | | | default interface | | | | | max depth of 50 to | | | | | 128, and allow it | | | | | to be | | | | | user-configured. | | | | | This change is now | | | | | present in CVS HEAD | | | | | and RELENG_5. | |-------------------+---------------+--------------+---------------------| | | | | KLDs work when | | | | | loaded from | | | | | userland, but not | | | | David | from the loader. | | kld support for | Needs testing | O'Brien, Ian | kldxref and loader | | amd64 | | Dowse | support has been | | | | | committed to HEAD | | | | | and RELENG_5 and | | | | | needs final | | | | | testing. | |-------------------+---------------+--------------+---------------------| | | | | Recent changes to | | | | | the ATA driver | | | | | trigger a bug on | | ATA panics under | | So/ren | sparc64 that causes | | sparc64 | Needs testing | Schmidt, | a panic on boot. | | | | Scott Long | This was caused by | | | | | bugs in busdma that | | | | | have been hopefully | | | | | fixed. | +------------------------------------------------------------------------+ ---------------------------------------------------------------------- home | contact | legal | (c) 1995-2004 The FreeBSD Project. All rights reserved. Last modified: 2004/09/09 23:13:10Received on Fri Sep 10 2004 - 05:40:45 UTC
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