Development

FreeBSD 6.0-RC2

2005-10-26 03:04 | Development

I think we would be going to release 6.0-RC2 soon, to encourage more testing against the recently caught issues that addressed several race conditions, etc.

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Signal in init(8)?!

2005-10-09 09:44 | Development

Strange thing happen.

Start your FreeBSD single-user.
Run /etc/netstart so your network is up.
Run /etc/rc.d/sshd start so you have sshd
Use ssh to login localhost, then su(1) to root
Type “init q”

Then init(8) would crash with signal 11. Yes, it was killed. As soon as kernel found this, it would panic with “Going nowhere without my init!”.

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Preparing for 6.0-RC1

2005-10-09 09:17 | Development

Well, this Saturday and Sunday is not for rest, because we have a 7-days’ vacation from October 1.

I think FreeBSD 6.0-STABLE (RELENG_6) is in a quite nice shape and it’s a good time to cut 6.0-RC1 (also RELENG_6_0) and be more careful committing code against RELENG_6. However, according to my diff service there are still a lot of unmerged changes.

I have submitted a plenty (about 4 or 5 or even 6 dozens) of MFC requests last week. I wish that the diff reduction part of these changes, in conjunction with important bugfixes, would got approved soon so we will have a healthy RC1 for test.

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How to make FreeBSD to permit several programs to play sound simutiously?

2005-08-16 21:02 | Development

You may have noticed that FreeBSD by default does not allow many programs to play sound at same time. For instance, you generally can not hear GAIM sound when you are hearing MP3.

Fortunately, this can be resolved if you have read the documentations. Now I write here so you can also Google it :-)

Add a single line into /etc/sysctl.conf:

hw.snd.pcm0.vchans=16

Then, reboot (or if you are careful enough, shut down all programs that is using sound subsystem, then run /etc/rc.d/sysctl restart)

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口水仗又打起来了……

2005-08-08 08:54 | Development

不到4分钟就有人反对我提高某一默认值的提议，不过我还是在游说这样做的好处。

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Colin Percival has imported his bsdiff related stuff

2005-08-07 05:07 | Development

This is an important step of getting the tools like freebsd-update and portsnap into base system, which provides good method of updating the base system (through binary updates) and ports tree.

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AMD64 string function optimizations

2005-08-03 09:14 | Development

So time comes that we should consider whether some of our string operations is not optimial and needs some operation. NetBSD seems to have done a lot of good work to make their MD layer better, and we should take these improvements if they are proven.

David O’Brien has pointed out that we should be careful on this, however, since some micro optimizations may hinder performance in a large scenario. With this concern in mind, I will redo some more benchmarks and request for -arch@’s idea before considering commiting the patchset. Currently, the NetBSD implementation of swab(2) is proven to be slower than the GCC generated code by about 25%. I will look into the assembly code generated to see whether I can help to solve this.

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