So, if I read that correctly, the file needs to be block aligned when its opened? Which is what Arjan said, am I following this right? Thanks again Michael. On 12/16/05, Learner <ruxyz@xxxxxxxxx> wrote: > > Checkout this discussion, which maybe of some help to > you > http://www.uwsg.iu.edu/hypermail/linux/kernel/0304.1/0400.html > > Cheers > > --- Michael Honeyfield <mhoneyfield@xxxxxxxxx> wrote: > > > Hi all. > > > > I am having some troubles with open() O_DIRECT. > > > > When trying to write out the contents of a mmap()'ed > > IO buffer using > > O_DIRECT, I get a "Bad Address" error. This happens > > on debian kernels > > above 2.6.8 and Fedora Core 4 kernels. Like wise > > with vanilla > > kernel.org kernels. > > > > However, with debian's provided 2.6.8 kernel, there > > was not such issue. > > > > Everything works fine if O_DIRECT is not used. The > > memery I am workign > > with is 512 byte aligned. > > > > I am unsure and am hoping someone can point me into > > the right > > direction. I have spent a fair amount of time on > > google and review > > vendor kernels and kernel.org changelogs, but have > > not seen anything > > that might help. > > > > Thanks in advance. > > > > Michael > > > > -- > > Kernelnewbies: Help each other learn about the Linux > > kernel. > > Archive: > > http://mail.nl.linux.org/kernelnewbies/ > > FAQ: http://kernelnewbies.org/faq/ > > > > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
