FreeBSD

Apparantly des@ has pointed out a serious problem with my patchset, say, the inconsistency of underlying API is the root of evil(tm), and should be corrected.

Let’s go go go!

So I got this in libmsun’s bsdsrc :-)

I have enabled PREEMPTION, FULL_PREEMPTION with ULE. Now I get strange result here:

• propagate_priority gets a TD_ON_LOCK(td)
• It tries to panic(), unfortunatelly, ts->ts_lockobj here is NULL
• A fatal trap 12 happens.

It seems that ts->ts_lockobj was touched by sched_lend_prio, for unknown reasons. Maybe there is some lock releases?

Finally I caught the kernel panic caused by some strange bugs found in thread scheduling. Investigating the crashdump.

The following change is considered as a new errata candadite from my view:

peter 2005-04-18 21:36:17 UTC FreeBSD src repository

Modified files: (Branch: RELENG_5_4)
sys/i386/i386 genassym.c vm86bios.s
sys/i386/include pcb.h
Log:
MFC: stop i386_vm86() from either panicing or trashing random pages.

This can improve stability, however we can not easily prove that it is producable :-) So I have turned that to re@.

To quote him:

So I finally tried DragonFly on one of our test servers (not my desktop :-). It seems that DragonFly still have some issues with the SATA devices. I am trying to fix it, maybe by porting some good FreeBSD ATAng code.

DragonFly has gave us some good examples that how a user-friendly operating system should, and some different way on designing a MP-capable architecture. Thanks, Matt!

Sometimes you may need to build some packages for older/newer versions of FreeBSD. That is simple if you use jail and other mechanisms.

In order to be successful, you need a “Full jail” say ordinary jail, installed with binary that is built from the target version of FreeBSD. For instance, build a 6.0 userland by sync’ing code to -HEAD.

Secondly, you need to replace two files in the jail: uname(1) and sysctl(1). What you have to do is to use sed to replace both FreeBSD version and __FreeBSDVersion (say, kern.osreldate), according to porters’ handbook.

Cameron Grant, the developer of FreeBSD newpcm driver, has untimely died on 20th March, 2005. May him rest in peace.

方法A: 使用代理。

在/etc/make.conf中设置：
FETCH_ENV= “HTTP_PROXY=IP[:端口]”
如果需要，在FETCH_ENV值后面加入空格，
HTTP_PROXY_AUTH=basic:*:user:password