minidump

最近遇到一些奇怪的bug，因为是对恢复时间有比较高要求的系统，所以顺便研究了一下用FreeBSD的textdump来代替更早前出现的minidump的方法。

Peter Wemm大长辈实现了在i386和amd64平台上的minidump。刚刚尝试了一下手动panic之后的结果，从512MB锐减到32MB了，而且该有的数据都有，确实不错。

junsu and I have discussed about some big hacks to FreeBSD kernel, and the implementation of a minidump is a good idea, I think.

On Windows there’s a minidump mechanism. The minidump will save ‘crashing’ pages only, while full dump will save the whole core memory when the system going to crash.