Hello list, I am the author of the following paper https://www.usenix.org/conference/lisa13/technical-sessions/papers/knauth just presented at LISA 2013. Folks at the conference expressed interested in seeing this merged into the official Linux kernel. I would like to gauge your opinion of whether this has a chance to actually be accepted. The basic idea is to provide a mechanism to track changes at the block device layer. I've based my prototype on dm-linear.c. The following things were added: (1) a bit vector (one bit per 4 KiB block) is used to track the changes. (2) a pseudo-file in /proc, one per tracked device, exports the changed block numbers There are also two small user-space tools for convenient extraction and merging of the modified blocks. I'd be happy to hear your thoughts/concerns and answer questions. If I get positive feedback, I'd prepare a patch (as outlined in the kernel docs) and send it to the list for further dissection. There also exists a bitbucket repository ( https://bitbucket.org/tknauth/devicemapper/ ) with all the data related to the above paper. It also includes the code [1], albeit in all its unpolished research hack glory. Kind regards, Thomas. [1] patch file against old 3.2 kernel: https://bitbucket.org/tknauth/devicemapper/src/ffe167007fb4c57f7b00d60ce32aa59ff4b66d61/code/dsync.diff?at=master -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
