选择chaos这个词是因为~~实在很难找到一个更合适的词来形容这儿了……
不是身体上的，而是精神上的。
今天一个哥们非常愤怒地抱怨我没有做某件事，我的错。
多少也明白了当时为什么对某件事死死抓住不放，因为我实在是一个说两句话就能吓跑一半人的家伙，沟通能力太差。
Read more...今天偶然发现以前做的一套CMS里面的显示发布日期的功能被干掉了。
这已经不是第一、第二或者第三次在我毫不知情的情况下作的commit了。而且我注意到commit log里面还赫然写着"Approved by: delphij"。
commit前复审是为了保证产品的品质而采取的措施。哪怕是形式上的尊重，先斩后奏也要奏上一本吧。
没有，似乎这是理所应当的。于是，原先所谨慎小心地避免的问题被一一地趟过。即使不谈这样做的人的能力，至少也应该关注一下这种态度——我不认为这是良好的团队精神的表现。
我决定和这套CMS的另一个主要作者一样不再维护这些代码或为其提供技术支持了，这样缺乏尊重的开发过程我实在没有兴趣跟进。
Read more...Yes, finally postfix is supporting DSN. To quote Witese, this is the first postfix snapshot which provides “full support for RFC 3461..3464 Delivery Status Notifications”!
Read more...I have done several experiments/asserts to ensure that the panic is related to ULE+PREEMPTION case only.
ULE: no panic
4BSD: no panic
4BSD+PREEMPTION: no panic
My latest progress is that I found that sched_switch in ULE for the threaded case, can decide whether subsequent call would panic. Investigating.
Read more...My company has offered me some test equipment (namely, a HP 360 with ILO, which is *great* for debugging at home!), and I has started to trip over the ULE code and find for bugs.
Read more...You can obtain latest list from sys/sys/proc.h:
* Below is a key of locks used to protect each member of struct proc. The
* lock is indicated by a reference to a specific character in parens in the
* associated comment.
* * - not yet protected
* a - only touched by curproc or parent during fork/wait
* b - created at fork, never changes
* (exception aiods switch vmspaces, but they are also
* marked 'P_SYSTEM' so hopefully it will be left alone)
* c - locked by proc mtx
* d - locked by allproc_lock lock
* e - locked by proctree_lock lock
* f - session mtx
* g - process group mtx
* h - callout_lock mtx
* i - by curproc or the master session mtx
* j - locked by sched_lock mtx
* k - only accessed by curthread
* l - the attaching proc or attaching proc parent
* m - Giant
* n - not locked, lazy
* o - ktrace lock
* p - select lock (sellock)
* q - td_contested lock
* r - p_peers lock
* x - created at fork, only changes during single threading in exec
* z - zombie threads/ksegroup lock
Today Giorgos Keramidas (keramida@) has noted that the following skill that can minimize lock period:
From: http://y.sina.com.cn 2005年06月17日 11:24 榕树下 文/流浪猫
这是我的一个同事给我讲的他上高中时一个真实的故事。
那一年他上高二，因为他家住在外地，所以他从上高中就在学校住校。他们高中大部分都是长春本市的学生，住校的同学相对较少，他们寝室也就只住了四个人。从生日排行，他排老四。他们寝的老大跟他是同乡，他们俩的关系比较好。
那是快要放暑假的时候，他们考完试，等着发表成绩。这时候已经没有什么课了，学习也比较轻松。那天是星期五，晚上吃完饭没有什么事，几个人就在寝室里侃大山。说着说着，就说到一些奇异的事情上面来了。
老三就说：「哎，你们听没听过一个游戏，说是比‘碟仙’更吓人。」
老二问：「啥游戏啊？」
「拍鬼。你们听过吗？」
我们同事就说：「没听过。咋玩呀？」
Read more...有一天，我们发现了一个bug。
然是有人决定把它workaround掉，大家都很开心。
突然有一天，那个bug被修了。
然后workaround变成了bug……所以说坚决抵制workaround。。。
Read more...It seems that I have hit a bug, where kseq_nice_rem is being called too much. Have read the code and added some KASSERT/MPASS’es.
Read more...