On Mon, Mar 31, 2003 at 10:35:14AM -0800, Pete Popov wrote: > > So before spending more time on debugging this, and creating patches > > for using HW coherency, I wanted to hear your input - maybe there are > > known problems in the Au1500 coherency implementation? > > Looks like Eric already replied to your questions. > > Patches to get the code to compile with NONCOHERENT_IO turned off would > be good, even if you don't want to do that yet. > > FYI, in the latest kernel I'm getting a panic when doing a very large > 'cp -a' from nfs to ata100 disk (don't know if the disk itself matters) > (Pb1500 and Db1500). The same test passes with a 2.4.18 kernel, so it > seems like it's not a hardware issue, unless the 2.4.18 kernel is just > getting lucky. I'll be gone till 4/20 so I won't have time to debug it > until after I get back. Not that this is Linux 2.4.21-pre4 which did replace essentially the entire IDE code due to major problems with the old IDE core. The problems were huge - large enough to warrant the rewrite of such a large subsystem in a stable series of kernels and certainly the dust hasn't fully settled yet. Ralf
