On Fri, Aug 4, 2017 at 8:05 AM, Qu Wenruo <quwenruo.bt...@gmx.com> wrote: > > For example, if one day there is some dm-csum to support verify csum of > given ranges (and skip unrelated ones specified by higher levels), btrfs > support for data csum is no longer an exclusive feature.
How would dm-csum differ from dm-integrity? https://www.kernel.org/doc/Documentation/device-mapper/dm-integrity.txt By that description it uses a journal to guarantee atomicity. If multiqueue maybe the performance implications are neutral. But certainly on spinning drives that would slow things down, especially if the file system is also journaling, and the workload is metadata heavy. -- Chris Murphy -- 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
