Hi, On Fri, Mar 08 2013, Theodore Ts'o wrote: > I hate to suggest this, but there's so many crappy devices out there > that I'm wondering if we need to figure out some way of maintaining a > black list of devices that don't handle discard properly. Yes, we already do that in the MMC layer. See e.g.: http://git.kernel.org/cgit/linux/kernel/git/cjb/mmc.git/commit/?id=3550ccdb9d8d350e526b809bf3dd92b550a74fe1 ("mmc: card: Skip secure erase on MoviNAND; causes unrecoverable corruption.") Thanks, - Chris. -- Chris Ball <cjb@xxxxxxxxxx> <http://printf.net/> One Laptop Per Child -- 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