On Sat, Mar 10, 2018 at 03:55:25AM +0100, Christoph Anton Mitterer wrote: > Hi. > > Just wondered... was it ever planned (or is there some equivalent) to > get support for btrfs in zerofree?
The zerofree was requested, eg. here https://bugzilla.kernel.org/show_bug.cgi?id=69121 and there was a discussion under proposed patches on fsdevel 3 years ago, message-id is 1422896713-25367-1-git-send-email-hol...@ahsoftware.de tl;dr there's nothing like zeofree now, because. Because the security reasons are not considered good enough and giving false sense of security. Clearing the qemu images sounds good but there's another way to do that via trim. I have a prototype code for that and after the years, seeing the request again, I'm not against adding it as long as it's not advertised as a security feature. The zeroing simply builds on top of the trim code, so it's merely adding the ioctl interface and passing down the desired operation. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
