cvs commit: src/sys/amd64/amd64 machdep.c trap.c vm_machdep.c src/sys/amd64/conf DEFAULTS src/sys/amd64/linux32 linux32_sysvec.c src/sys/arm/arm trap.c src/sys/arm/conf AVILA src/sys/arm/xscale/i8134x crb_machdep.c src/sys/compat/freebsd32 ...

Robert Watson rwatson at
Wed Mar 12 10:26:43 UTC 2008

On Wed, 12 Mar 2008, Jeff Roberson wrote:

>  Remove kernel support for M:N threading.
>  While the KSE project was quite successful in bringing threading to
>  FreeBSD, the M:N approach taken by the kse library was never developed
>  to its full potential.  Backwards compatibility will be provided via
>  libmap.conf for dynamically linked binaries and static binaries will
>  be broken.

This will likely require us to grow a significantly more mature approach to 
compat libraries, especially for 5.x where I seem to recall libthr was of 
mixed productionness.  Once these changes have settled, the right approach is 
probably to bring up a 5.x chroot on an 8.x kernel and fault in problems.

While 5.x isn't widely hacked on currently, it is used pretty extensively in 
our user base (a sample of Java binary downloads a few months ago, for 
example, showed 5.x/i386 to be the most widely used platform for Java), and I 
know I've had a lot of ... feedback ... about the fact that our upgrade path 
from 5.x to 6.x has gotten less functional over time.

Anyhow, once things settle a bit, let's see where we are.

Robert N M Watson
Computer Laboratory
University of Cambridge

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