Re: [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem
Jeff Garzik <[email protected]> Thu, 10 Aug 2006 17:00:28 -0400
| Newsgroups | gmane.comp.file-systems.ext2.devel,gmane.linux.file-systems,gmane.linux.kernel |
|---|---|
| Message-ID | <[email protected]> |
Andrew Morton wrote: > On Thu, 10 Aug 2006 16:13:33 -0400 > Jeff Garzik <[email protected]> wrote: > >> The sooner we kill buffer heads and use submit_bio(), the better :) > > A buffer_head is a caching entity and a bio is an IO container. They're > quite separate concepts. Yeah, sorry, I meant direct pagecache I/O. I forgot that bio doesn't handle caching. > A buffer_head is the kernel's sole abstraction of a disk block. > Filesystems use disk blocks a lot, and they need such an abstraction. IMO Al Viro work has shown that you can do pagecache I/O without needing such a heavyweight system. Jeff ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642