On Aug 20, 2010, at 5:41 PM, Eric Sandeen wrote: > If a device supports discard -and- returns 0s for discarded blocks, > then we can skip the inode table initialization -and- the inode table > zeroing at mkfs time, and skip the lazy init as well since they are > already zeroed out. > > Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx> This needs to be configurable in /etc/mke2fs.conf. Without naming the manufacturer, I'm aware of at least one device which claims that discard works, and will even return zeros --- but after a power cycle, if the block has not been reallocated, will once again return the old, pre-discard values that had been stored in that block. In other words, the discard is not power-cycle persistent... -- Ted -- 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
