On Wed, Nov 05, 2014 at 04:18:36PM +0800, 秦弋戈 wrote: > Hello, > > > Thank you very much for helping me. Before I see your reply, I enlarged > my program and I saw more page faults in code segment. Now I know there > is something called fault-around. > > > I read the Chapter 16 of the ULK which introduces file access. I started > to know a technique called read-ahead from this chapter. So what's the > difference or relationship between fault-around and read-ahead? I think > they are used in different areas (layers) but have the same idea. Am I > right? readahead reads data from backing storage to page-cache, but it doesn't map it to process' address space. fault-around maps pages which already in page cache: via readahead or not. -- Kirill A. Shutemov _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
