Li Zefan wrote: > A better title: > [Patch] blktrace: remove debugfs entries on bad path > > Stefan Raspl wrote: >> debugfs directory entries for devices are not removed on bad path. > > Can you be more elaborate on how to reproduce this issue? It can happen for most bad pathes within do_blk_trace_setup(). One way to trigger is to set the Vmalloc space via the respective kernel parameter to a value that is so small that it will not suffice for the 2MB per device and cpu that is required. For instance, set vmalloc=10M and start blktrace on a system with 2 cpus on 7 devices. Depending on how much Vmalloc space is still free, the final 2 or 3 devices will fail with a message like this: BLKTRACESETUP(2) /dev/sdu failed: 5/Input/output error Best regards, Stefan Raspl -- To unsubscribe from this list: send the line "unsubscribe linux-btrace" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
