Hi, I am writing a filter driver for ext3 in which it replaces the block device request queue 'make_request_fn' with the driver custom function. Calling freeze_bdev() or freeze_super() before replacing the 'make_request_fn' hangs the kernel. What am I doing wrong ? Will this method work ? full code : https://gist.github.com/3839380 Snippet : sb = freeze_bdev(bd); if (sb) printk(KERN_INFO "filter: freez block device\n"); if (bd->bd_disk->queue->make_request_fn == filter_mrqfn) { printk(KERN_INFO "filter: modules request function is already active\n"); } else { orig_mrqfn = bd->bd_disk->queue->make_request_fn; bd->bd_disk->queue->make_request_fn = filter_mrqfn; } thaw_bdev(bd, sb); Please forgive my ignorance, I am a fresher in file systems :) Regards. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
