Messages in this thread | | | From | Goswin von Brederlow <> | Subject | Re: zero out blocks of freed user data for operation a virtual machine environment | Date | Mon, 25 May 2009 15:14:02 +0200 |
| |
Thomas Glanzmann <thomas@glanzmann.de> writes:
> Hello Ted, > >> Yes, it does, sb_issue_discard(). So if you wanted to hook into this >> routine with a function which issued calls to zero out blocks, it >> would be easy to create a private patch. > > that sounds good because it wouldn't only target the most used > filesystem but every other filesystem that uses the interface as well. > Do you think that a tunable or configurable patch has a chance to hit > upstream as well? > > Thomas
I could imagine a device mapper target that eats TRIM commands and writes out zeroes instead. That should be easy to maintain outside or inside the upstream kernel source.
MfG Goswin
| |