Currently in order to print block_device name one should use blkdev() helper which requires temproral buffer of size BDEVNAME_SIZE (32bytes). This is very ineffective because result in stack usage bloating for deep IO call traces where stack usage is close to maximum values. It is reasonable to introduce dedicated format specifier for block_device name, unfortunately "%pb", "%pB", "%pd" and "%pD" are already reserved for other data types I've pick "%pg" ala geometry. If some one want to offer sane spacifier name please let me know. Since this is RFC version I've pick rough patch split policy (based on subsystem). Please let me know if patchset should be split in different way. TOC: ## Add format helpers and simple cleanup lib: vsprintf add pg format specifier fs: use gendisk disk_name where possible ## migrate subsystems to format helpers block: use block_device name vsprintf helper fs: use block_device name vsprintf helper md: use block_device name vsprintf helper block/partitions use block_device name vsprintf help drivers: use block_device name vsprintf helper -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
