简单聊聊write的背后 ,然后详细讲述是如何落盘的 Lab File System Add support for double indirect block In this assignment you’ll increase the maximum size of an xv6 file. Currently xv6 files are limited to 268 blocks, or 268*BSIZE bytes (BSIZE is 1024 in xv6). This limit comes from the fact that an

Utility Max How firms make production decision Model consumer preference - Preference Consum completeness transitivity non sa / more is always better than less budget constraint indifferent curves cons prefer higher IC IC are downward Sloping IC nerver cross only IC through every bundle Intuitive - Graphical - mathi marginal decisional (边际递减效应) MRS = Del P VS DEl C convex concave