On Tue, 20 Jul 2004 20:48:24 +0200 bert hubert <ahu@xxxxxxx> wrote: Hi Bert, > On Tue, Jul 20, 2004 at 10:27:57AM -0700, Shesha Sreenivasamurthy wrote: > > I am having trouble with O_DIRECT. Trying to read or write from a block > > device partition. > > > > 1. Can O_DIRECT be used on a plain block device partition say > > "/dev/sda11" without having a filesystem on it. > > As fas as I know, yes, but be aware that O_DIRECT requires page aligned > addresses! (an integral of 4096 on most systems). "soft block size" aligned. The soft block size can be smaller than a page (but not bigger). There's a requirement for: - r/w offset - r/w size greetings, Rob van Nieuwkerk -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
