Hi... > How can i see which programs and files the filesystem cache is using? Let me elaborate, you mean "given a page in page cache, i want to know (a)which task is currently accessing the page and (b)which file is mapped in this cache"? For point (b), please study the address_space structure defined in include/linux/fs.h. It provides the mapping between inode and buffer (in the page cache). For point (a), perhaps you find the information by searching the corelation between opened file descriptor and its inode....thus eventually might point out the page (in page cache) that is used. Somebody CMIIW regards Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/