????1.2 Linux??????
???????????????????Linux????????????????????????????y??????????????????乤????????????????????????????????????????????e???????????????????????????????????????????????????????????????????????????????е??????????????????????????????????????Linux????????Ч???????檔???????????????Linux????????????????Linux?????Ч??????????
????1.2.1 ????????????
??????????????????32λ??64λ????????????????????????????????????????????????????????4GB????????????????????32λ??64λ????Linux????????????????????????????????
???????1-10?У????????Linux????????32λ??64λ???????????????????????????浽????????????????????????????Χ????????????????Linux?????????????
??????32λ?????????IA-32??Linux?????????????????????1GB?????????????????896MB??????ν?? ZONE_NORMAL????????????????1GB?????????С????????????????????????????????ZONE_HIGHMEM??????????????????????????????
??????????棬??64λ?????????x86-64?????x64????ZONE_HIGHMEM??????????64GB????????IA-64???????????128GB????????????????????64λ????????????ZONE_HIGHMEM??ZONE_NORMAL????儷?????????????


?????1-10 32λ??64λ????Linux?????沼??

?????????????????
?????1-11????32λ??64λ?????Linux???????????
??????32λ???????????????????????????4GB??????32λ???????????????????????????????????????3GB?????????1GB????????????????????4G/4G??????????????
??????????棬??64λ????У???x86-64??IA64????д?????????????????????????????????????????


?????1-11 32λ??64λ??????????????????

????1.2.2 ??????????
???????????????????????????ú????????????????????????????????κε???????涼???????????С????????????????Linux???????е?????????????????????Linux??δ?????????檔????1.2.1??“???????????????”????????ò???????????????棬??????Linux????????????С????????????????????????????????1-12???????????治???????????????С???????????????????????棬??Щ????е?????????????????swap????С?
?????1-12???????ó?????????д?????д????????????д???棨cache?????壨buffer??????pdflush????????л????????С????????滺???С???pdfflush???????????/?????????????д???????С?????“???????”??


?????1-12 Linux??????????

????Linux??????????????д??????Linux?????????????????????????????????????????????????棬??Linux?????????????????Ч???????????????????÷??????п????????????????????檔???????д???????Linux???У????????????20MB???????檔
???????????????￡?Linux????swap?????????Ч???swap?????????????ζ???????????????????????Linux???????????ε???Ч?????“??????”??