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FreeBSD 6.0 Open Issues

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This is a list of open issues that need to be resolved for FreeBSD 6.0. If you have any updates for this list, please e-mail

Show stopper defects for 6.0-RELEASE

Issue Status Responsible Description
fdisk & boot0cfg In progress Poul-Henning Kamp The boot0cfg and fdisk utilities need to be updated to use the proper GEOM model for updating the boot sector of a mounted disk.
"snaplk" livelock In progress   Found by stress tests at
panic: handle_written_inodeblock: live inodedep Unknown   Found by stress tests at
page fault at if_ethersubr.c: 284 In progress Gleb Smirnoff Found by stress tests at
panic: wrong b_bufobj Unknown Jeff Roberson Found by stress tests at This is high priority and can be provoked within minutes of testing!
Livelock Unknown   Found by stress tests at This is the second most frequent panic reported by Peter Holm.
panic: softdep_setup_inomapdep: found inode Unknown   Found by stress tests at
aac(4) regression In progress Scott Long There appears to be a regression in the aac device driver on Dell 2550 machines.

Required features for 6.0-RELEASE

Issue Status Responsible Description
OpenBSM In progress Robert Watson The integration of OpenBSM is waiting on some final licensing hurdles. Once those are cleared, it will be a very desirable feature for 6.0.
beastie.4th In progress Scott Long Need to address the shortcomings of the old beastie.4th boot menu and hook it back into the boot process. This includes making the graphics easier to select and override, and making it use simple scrolling instead of ANSI screen addressing.

Desired features for 6.0-RELEASE

Issue Status Responsible Description
fpudna: fpcurthread == curthread 1 times Not done Peter Wemm This warning is appearing sporadically on a dual AMD64 system. It appears to be warning against a legitimate problem, and thus should be investigated and fixed.
devfs umount panic Not done   There is a race condition between device removal and devfs umounts that causes "Memory modified after free" panics. Can be reproduced by doing 'mdconfig -u' concurrently with unmounting a devfs instance.
nullfs hash size Not done   Nullfs (and perhaps other filesystems) use an absurdly small hash size that causes significant performance penalties.
/dev/kmem panic Not done   Kris has noticed panics on SMP machines when there was ABI breakage of libkvm and world was not rebuilt and utilities like fstat were used. This suggests panics can be caused by incorrect accesses to /dev/kmem.
KLDs on sparc64 Not done   On sparc64 machines with more than 4Gb memory KLDs are not usable and will panic the system. The problem is reportedly with how the KLDs are compiled, it only works if the code ends up below 4G.
Max RAM on sparc64 Not done   Maximum RAM on sparc64 appears to be limited to 16Gb.
make -jN Not done   Doing 'make -jN', then suspending/resuming it may result in make reporting it lost child process(es).
kgdb on sparc64 Not done   It looks like kgdb is still broken on sparc64. It is better than it used to be but still can't obtain a traceback.
ULE Not done   ULE is reported to still be broken on SMP machines. Investigation is needed into the actual nature of the breakage, if any.
M_SAVEDINO Not done   A 'memory modified after free' bug affecting M_SAVEDINO. Possibly a softupdates bug.

Documentation items that must be resolved for 6.0

Issue Status Responsible Description
dhclient Not done freebsd-doc The ISC DHCP client v3.x has been removed in favor of the OpenBSD DHCP client which was based on ISC DHCP v2.X. Minimal updates to the FreeBSD Handbook may be required.
WPA / hostap Not done freebsd-doc Significant new wireless functionality will be available with FreeBSD 6.0. The wireless section of the FreeBSD Handbook should be updated to describe how to connect to networks with WPA keys, setup host access points, etc.

Testing focuses for 6.0-RELEASE

Issue Status Responsible Description
New dhclient Needs testing Brooks Davis The ISC DHCP client v3.x has been removed in favor of the OpenBSD DHCP client which was based on ISC DHCP v2.X. More testing is needed to make sure there are no major regressions in functionality. We are particularly interested in tests involving non-standard environments.
WPA / hostap Needs testing Sam Leffler Significant new wireless functionality is available in FreeBSD 6.0. As this functionality is rather new, further testing would be appreciated.
if_bridge Needs testing   A new bridge implementation has been added from NetBSD. As this has not seen a wider audience yet, further testing would be appreciated. See if_bridge(4) for configuration details.
sysinstall dhclient problems Needs testing Scott Long, Sam Leffler sysinstall has been updated to deal with the new DHCP client in 6.0, more testing is needed.

Stress Test Panics

The system is continuously being subjected to Peter Holm's Kernel Stress Test Suite. The following issues have recently been discovered from this test suite.

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Last modified: 2005/07/14 11:42:06