diff --git a/en/releases/5.3R/todo.sgml b/en/releases/5.3R/todo.sgml index 8e41304a9e..bff459b342 100644 --- a/en/releases/5.3R/todo.sgml +++ b/en/releases/5.3R/todo.sgml @@ -1,369 +1,362 @@ - + %includes; %developers; N/A"> Done"> In progress"> Needs testing"> Not done"> Unknown"> ]> &header;

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@FreeBSD.org.

Show stopper defects for 5.3-RELEASE

IssueStatusResponsibleDescription
/dev/random stalls single user and sysinstall &status.unknown; &a.markm; The kernel random number generator requires either the yarrow subsystem to start or the user to tap on the keyboard before it will deliver data to /dev/random. This results in confusing behavior and strange messages when in single user mode, and makes sysinstall stall. Non-blocking behavior must be restored for 5.3.
gcc 3.3 floating point alignment regression &status.new;   The current gcc snapshot includes regressions in alignment of floating point arguments, resulting in a substantial performance degradation. Newer gcc 3.3.3 snapshots fix this, and must be imported before 5.3-RELEASE. If gcc-3.4 is imported instead, it must be checked for this regression.
PREEMPTION triggers frequent hangs &status.new; &a.jhb; Recent re-introduction of PREEMPTION has resulted in reports of frequent hangs. This may be a combination of bugs in scheduling and context switching, as well as existing bugs triggered by preemption. These problems must be corrected for 5.3-RELEASE (and ideally long before).

Required features for 5.3-RELEASE

- - + + -
IssueStatusResponsibleDescription
GCC 3.4 for all platforms &status.wip; &a.kan; GCC 3.4 is needed to support TLS on all our our Tier-1 platforms. It also is likely to be better maintained by the FSF during the lifespan on 5.x than GCC 3.3 is.
GDB 6.1 kernel debugging support &status.wip &a.marcel; GDB 6.1.1 import does not include FreeBSD kernel debugging support.
BIND9 import into 5-CURRENT &status.wip; &a.dougb; BIND9 must be imported for 5.3-RELEASE.
KSE support for sparc64&status.wip;&a.marcel;---- Kernel bits implemented, userland not implemented. Required for 5.3-RELEASE.
Fine-grained network stack locking without Giant &status.wip; &a.rwatson;Significant parts of the network stack (especially IPv4 and - IPv6) now have fine-grained locking of their data structures. + 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 lock. However, a number of device drivers + and less 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.
kld support for amd64 &status.wip; &a.obrien; &a.peter; KLDs work when loaded from userland, but not from the loader. kldxref might also need work. Required for amd64 to be promoted to tier-1 status.
GDB thread support &status.wip; &a.davidxu;,&a.marcel; With improved support for threading primitives, support is now required to ease debugging of threaded applications. Ideally, this support will work for both libthr and libkse threading models.

Desired features for 5.3-RELEASE

- + - - + + - - + + - + - - - - - - -
IssueStatusResponsibleDescription
Completed compiler support for dynamic Completed compiler support for dynamic root -- &a.kan; and &a.obrien; All platforms but IA64 have modifications to support /libexec/ld.so in the gcc base source tree; changes for all FreeBSD platforms have been merged back into the FSF 3.4 tree. They should be brought into FreeBSD on the vendor branch with a 3.4 import for 5.3-RELEASE.
truss support for ptrace&status.wip;&a.robert;---- 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 is highly desirable to update truss to operate in a post-procfs world. &a.des; had prototype patches; &a.robert; is developing and testing patches now. Support for system call tracing has been added to ptrace().
Per-platform Thread-Local Storage &status.wip; &a.dfr;, &a.marcel; To complete support for thread-local storage on FreeBSD, per-architecture changes must be made. Currently pending platforms are amd64, alpha, ia64, i386, sparc64, and powerpc.
FAST_IPSEC and KAME compatibility &status.new; -- 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 acceleration. 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.
rpc.lockd(8) stability&status.wip;&a.rwatson;---- A process cannot be interrupted while waiting on a lock. Fixing this requires that the RPC code be taught how to deal with lock cancellation and interruption events.
Revised kld build infrastructure &status.new; &a.peter; 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) 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. &a.peter; has done some initial prototyping, and should be contacted before starting on this work.
Merge of Darwin msdosfs, other fixes &status.new; -- Apple's Darwin operating system has fairly extensive improvements to msdosfs and other kernel services; these fixes must be reviewed and merged to the FreeBSD tree.
Race conditions in truss Errata candidate &a.robert; 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 appears to exist 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.
ACL_MASK override of umask support in UFS&status.wip;&status.new; &a.rwatson; Many systems supporting POSIX.1e ACLs permit a minor violation to that specification, in which the ACL_MASK entry overrides the umask, rather than being intersected with it. The resulting semantics can be useful in group-oriented environments, and as such would be very helpful on FreeBSD.
filedesc LOR &status.new; -- The LOR reported in PR kern/55175 needs to be fixed. Filedesc locking needs to be heavily reviewed in general.
MAC Framework devfs path fixes&status.wip;&a.rwatson;&a.green; has submitted patches to improve the consistency - of the pathnames passed into the MAC Framework devfs labeling - entry points. These patches need to be thoroughly reviewed - and tested, then merged.
MAC support for NFS Server &status.new; &a.rwatson; Currently, MAC protections are enforced only on locally originated file system operations (VOPs), and not on RPCs generated via the NFS server. Improvements in NFS 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.
busdma in all PCI drivers &status.wip; -- All PCI drivers must use busdma for DMA; no use of vtophys() will be permitted for any recent device driver. ISA drivers may be exempt.
KSE support for alpha &status.wip; &a.marcel; Userland bits implemented, kernel bits not implemented.

Documentation items that must be resolved for 5.3

IssueStatusResponsibleDescription
i386 Floppy Installation Docs &status.new; -- The installation documentation doesn't take into account the new floppy images (with a full kernel split across multiple disks). This should be updated.
Finish hardware notes trimming &status.wip; -- Finish removing mention of individual devices in the hardware notes; hardware notes listings should refer to device listings in individual manual pages.

Testing focuses for 5.3-RELEASE

IssueStatusResponsibleDescription
SCHED_ULE as the default scheduler &status.untested; &a.jeff; SCHED_ULE provides better interactivity, higher performance, and the ability to support pinning and affinity. Basic HTT scheduling policies should be in place for 5.3 also.
make -DUSE_KQUEUE causes lockup with buildworld -jBIGNUM &status.untested; &a.green;, &a.jmg; Attempts to use make(1) with KQueues appears to result in a kernel hang under "heavy load". It would be desirable to fix this both from the perspective of building FreeBSD quickly as a developer, but also because it's an instability that could show up under other high load and heavy use of KQueues. See PR kern/57945 for a proposed patch and details. This appear to be the product of a locking problem, and must be fixed for 5.3.
KSE as the default threads library &status.untested; &a.davidxu;, &a.deischen; KSE has matured to the point of being more stable and POSIX-compliant than the traditional libc_r. All Tier-1 platforms MUST have stable KSE support for 5.3 in order to 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.
Updated binutils for all platforms &status.untested; &a.obrien; Binutils needs updating in order to support new platforms, newer GDB versions, and Thread Local Storage.
&footer;