staging: zcache: delete it 中有一段英文不明白

[科学之子]

zcache is obsolete and not used anymore, Bob Liu has rewritten it and is submitting it for inclusion through the main -mm tree, as it should have been done in the first place...

前面的感觉容易理解,就是zcache已经废弃,Bob Liu重写了他并提交到 main -mm tree(mm模块的代码树?),
但后面的"as it should have been done in the first place",不明白是什么意思...
意思是这次修改的优先级排在第一位?

[vickycq]

main -mm tree(mm模块的代码树?)

linux-mm 曾经是重要的开发分支。但从 2007 年开始，其角色逐渐被 linux-next 取代。
于是 linux-mm 又恢复了内存管理补丁集的原有角色。(mm - Memory Management)
https://en.wikipedia.org/wiki/Mm_tree
http://linux-mm.org/

但后面的"as it should have been done in the first place",不明白是什么意思...
意思是这次修改的优先级排在第一位?

意思是早就应该这样做了。代码问题这么多，折腾都是白折腾，不如早死早超生