Hi, A while ago, I improved the grub-mount patches a bit. Mostly:
* Write a simplified compile.py script. * Remove nested functions. They don't work on Mac because of stack execution protection. * Improve ReiserFS reading performance. The whole fork: https://github.com/albertz/grub-fuse The full list of my changes: https://github.com/albertz/grub-fuse/compare/35be80a3c6c0f1b9d56563221e17728151f51cbd...master This is based on earlier work on grub-mount. I think that is all this: https://github.com/albertz/grub-fuse/compare/f5d6558771f1ab2c8d324b23a5b2079a0dfb76a6...35be80a3c6c0f1b9d56563221e17728151f51cbd I'm not sure wether any of this is of interest here. But maybe the ReiserFS reading performance patch is, so some more details: The reading performance was quite bad. Basically, the reading speed on some position x in some file was linear(!) to x. Thus, reading a file of length n is quadratic to n. With my patch, it is linear to n, as it should be. However, my patch is C++, so I'm not sure wether this is of interest. Maybe something similar can be recoded in C. The changes were just done in fs/reiserfs.c in grub_reiserfs_read. Basically I added: * _forward_optimal_position(key.directory_id, key.object_id, initial_position, ¤t_position, ¤t_key_offset); * _save_pos(key.directory_id, key.object_id, current_position, current_key_offset); https://github.com/albertz/grub-fuse/blob/master/grub-core/fs/reiserfs.c The implementations of _forward_optimal_position and _save_pos: https://github.com/albertz/grub-fuse/blob/master/grub-core/fs/reiserfs_key_cache.cpp And the cache: https://github.com/albertz/grub-fuse/blob/master/include/cache.h I just needed this to grab some huge files from some ReiserFS usb disk and it greatly helped me. The speed difference for files such as 1GB were *huge*: in the original implementation, it would have taken about 10-20h, in my, it was about 20-30min. Regards, Albert _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
