On Tue, Jun 17, 2014 at 6:00 AM, Lukáš Czerner <lczerner@xxxxxxxxxx> wrote: > > What is the difference between -o discard mount option ? Android will not mount -o discard because of the overall penalty. > I guess > that this way you can do it selectively on certain files, but I > wonder how useful it is going to be anyway ? For certain files only. Useful enough. > If they are ok with only best effort, then we can have FISTRIM ioctl > which would use the same internal file system functionality as > FITRIM but we would add a flag to be able to call sb_issue_discard() > with BLKDEV_DISCARD_SECURE flag, I think this was the idea of the original patch. > disable the optimization to skip > already discarded groups and call sync on the file system before we > start doing any actuall work. That would need adding to the original patch. > If we do this though we should not add word "security" anywhere for > the use to see :) We can live with that. -- 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
