Hello all. We have even found the hack that fix that problem:
Index: linux/drivers/media/video/video-buf.c =================================================================== RCS file: /cvs/video4linux/v4l-kernel/linux/drivers/media/video/video-buf.c,v retrieving revision 1.21 diff -u -p -r1.21 video-buf.c --- linux/drivers/media/video/video-buf.c 16 Oct 2005 12:13:58 -0000 +++ linux/drivers/media/video/video-buf.c 12 Nov 2005 22:19:13 -0000 @@ -1248,7 +1248,7 @@ int videobuf_mmap_mapper(struct videobuf map->end = vma->vm_end; map->q = q; vma->vm_ops = &videobuf_vm_ops; - vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND; vma->vm_flags &= ~VM_IO; /* using shared anonymous pages */ vma->vm_private_data = map; dprintk(1,"mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n", Somehow since 2.6.15-rc1 VM_RESERVED makes get_user_pages return EFAULT. I don't know the exact reason of that behavior and the correct way to fix that problem. Just kernel interfaces changed once again, the old point everyone knows. So if someone can explain it, that would be helpful. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]