Hello. I want implement educational file-system for Linux. I suppose it would be very simplified UFS (for example, with such limitations like: size of file <=8K, length of name <20 characters and so on). The main goal is simplicity, small size of implementation and space for speedup improvements. 1)May be some one hear about such for Linux 2.6 ? 2)Currently I'm investigating how "truncate" method should works on the filesystem layer. Is any description how it should works? I mean, as I understand first I should truncate page cache (block_truncate_page?), what about "buffer_head" which now not belong to my file and may be used by another process at the same time? 3)As I see sb_find_get_block return "buffer_head", with b_count==2, (if nobody before use this "buffer_head"), is it right behavior? Should I call two time brelse to free "buffer_head", which I get using sb_find_get_block? 4)Is there set of tests to check work of ordinary Unix file-system? For example: one process creates files, and another check using (readdir) is all right, one open file for writing, another open the same file for reading... etc -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
