Hi... this is also an area that confused me from long time ago, but hopefully now I got better. Here's my wording (let's assume all page mentioned here are file backed ones): if page fault happens, page cache will be checked to determined which page hold the corresponding disk block. If one is found, this page will be mapped into the related faulting process' VMA otherwise, if the data is not found in page cache, disk read will be engaged. Most likely it will be done in async style. Once it is loaded into page cache, this page will also be mapped into faulting process' VMA. Notice that I use the term "page cache" here, since in 2.6 buffer and page cache are unified and called as page cache. -- regards, Mulyadi Santosa Freelance Linux trainer blog: the-hydra.blogspot.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
