On Wed, Jan 31, 2007 at 02:44:23PM +0000, Al Viro wrote: > On Wed, Jan 31, 2007 at 09:34:54AM -0500, Eddie Pettis wrote: > > Short question: Is it possible to locate the struct file * associated > > with a bio? If so, how? > > Obviously impossible. For one thing, there might very well be no inode, > let alone struct file, associated with bio in question (e.g. for any > filesystem metadata). Moreover, the same on-disk object may get IO > without any stuct file at all (e.g. a directory) or with many struct > file (e.g. any file independently opened by several processes; no matter > how many of them do reads, we'll get stuff pulled into page cache the > same way (and once, not once per struct file).
BTW, here's a good testcase for you: /etc/ld.so.cache; it's accessed at practically any execve(), so it should be very close to top of the popularity list (right there with /lib/libc.so.6)... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
