On 08/29/2014 11:35 AM, Matthias Schniedermeyer wrote: > $ fstrim -v / > fstrim: /: discard operation not supported. > > How can i debug why fstrim/the kernel thinks discard isn't supported? $ strace -v fstrim -v / ... ioctl(3, FITRIM, 0x7fff4d693590) = -1 EOPNOTSUPP (Operation not supported) ... Interestingly, fstrim's error message has changed from the more precise fstrim: /: FITRIM ioctl failed: Operation not supported (e.g. in 2.23.2) to a probably more user-friendly fstrim: /: the discard operation is not supported (in the current git version). Have a nice day, Berny -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
