On Don, 2011-09-01 at 15:13 -0600, Jens Axboe wrote: > [...] > I mean that every device should plug in at the same place. There are > definite up and down sides to plugging in at the stacking level and > bypassing the IO scheduler. So you have to weight the pros and cons > before doing that. We need to fix this. Drivers doing that lose out on > other features in the name of a bit more performance, that's just not > acceptable. I have updated the diagram according to all of your hints: http://www.thomas-krenn.com/de/wikiDE/images/0/07/Linux-IO-Stack.png I had also some off-list discussion with Florian Haas, who convinced me that the file systems are below of the page cache. I hope this is now correct. I took some information regarding the VFS layer from www.mimuw.edu.pl/~vincent/lecture12/12-fs.pdf I'm looking forward to your feedback and corrections. Best regards, Werner -- : Werner Fischer : Technology Specialist : Thomas-Krenn.AG | The server-experts : http://www.thomas-krenn.com | http://www.thomas-krenn.com/wiki -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
