FreeBSD 7.2-RELEASE 在前幾天順利放出來了，正式的公告在「FreeBSD 7.2-RELEASE Announcement」這裡可以看到，與 FreeBSD 7.1 主要的差異在「FreeBSD 7.2-RELEASE Release Notes」可以查到。
對我最主要的差異應該是 amd64 平台上 kernel virtual address space 拉高到 6GB，用 FreeBSD ZFS 不需要再調整 vm 參數了，預設的大小就夠用。
不過，大概是太準時的關係，libc 有個蠻嚴重的 bug 沒有在 release 前被找到：(參考「FreeBSD 7.2-RELEASE Errata」)
[20090504] A lock handling error has been found in interaction between malloc(3) implementation and threading library. When a multi-threaded process calls the fork(2) system call in a thread and the malloc(3) function in another thread, it can cause a deadlock in the child process. An Errata Notice to fix this problem is planned after the release.
當一個 thread 在 fork()，另一個在 malloc()，產生出來的 child process 會 deadlock...