On Fri, 30 Jan 2009 11:06:47 +1000 Dave Airlie <airl...@gmail.com> wrote:
> On Fri, Jan 30, 2009 at 10:30 AM, Andrew Morton > <a...@linux-foundation.org> wrote: > > (cc's added) > > > > On Wed, 21 Jan 2009 13:27:48 +0100 > > Sami Kerola <kerol...@iki.fi> wrote: > > > >> I compiled the Torvalds git kernel 2.6.29-rc2-00013 and I got an oops. > >> The oops happens when ever X starts. Initially I was booting with run > >> level 5 and it hung. I tried to use run level to 3 and an operating > >> system started just fine. When I type startx the hung happen again. > >> Please let me know if you need some more information besides oops from > >> messages file and lspci output. > >> > >> > >> Jan 21 08:53:58 lelux kernel: ------------[ cut here ]------------ > >> Jan 21 08:53:58 lelux kernel: kernel BUG at drivers/gpu/drm/drm_fops.c:146! > > > > I assume that 2.6.28 didn't do this? > > This is a userspace race between udev and libdrm, I'm not sure we can do > anything in the kernel other than BUG, maybe we should just WARN instead. > > Basically, libdrm creates devices nodes, the initial drm opening gets that, > udev > comes along when the module is loaded and re-creates the device node, > when AIGLX opens the device > it can't figure out wtf just happened, as the inode->i_mapping we use > to store the GEM device mmap ranges is different. > > I think building libdrm with --enable-udev is the correct answer, and > maybe switching this to a WARN so it doesn't blow up. > > maybe we shouldn't be storing the inode mapping like this? anyone any > better idea? > hm, I'm a bit surprised to see the drm code using `struct address_space' and read_mapping_page() and unmap_mapping_range() and such. I thought those only worked with regular files and pagecache :) Is it possible to briefly explain what's going on there? What instance of address_space_operations does ->dev_mapping actually point at? ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
