On Mon, May 31, 2021 at 9:38 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, May 31, 2021 at 10:25:26AM +0300, Christoph Hellwig wrote: > > The raw driver used to provide direct unbuffered access to block devices > > before O_DIRECT was invented. It has been obsolete for more than a > > decade. > > What? Really? We can finally do this? Yes! > > For some reason, I thought there was some IBM userspace tools that > relied on this device, if not, then great! > > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > > Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Acked-by: Arnd Bergmann <arnd@xxxxxxxx> Link: https://lore.kernel.org/lkml/Pine.LNX.4.64.0703180754060.6605@CPE00045a9c397f-CM001225dbafb6/ The discussion from 2007 is the last one I could find on lore that has useful information on when and why this was not removed in the past. The driver was scheduled from a 2005 removal in 2004, but not removed because both Red Hat and SuSE relied on the feature in their distros. >From what I could find out, this continued to be the case in Red Hat Enterprise Linux 6 and SUSE Linux Enterprise server 11 that were supported between 2009 and 2020, but the following versions dropped the support. Arnd
