Quoting David Sterba (2013-07-10 18:54:54) > On Sun, Jun 30, 2013 at 12:35:09PM -0500, Mitch Harder wrote: > > There's been a parallel effort to incorporate a general set of lz4 > > patches in the kernel. > > > > I see these patches are currently queued up in the linux-next tree, so > > we may see them in the 3.11 kernel. > > The patches are now merged into 3.11. > > > It looks like lz4 and lz4hc will be provided. > > Regarding HC mode, there are some core compression code changes needed > in order to fully utilize the its potential, namely larger chunk size > that's compressed at a time. There was some tiny yet measurable gain of > HC against ordinary mode compared on current 4k-at-a-time > implementation, but the space savings did not justify the speed drop of > HC mode. > > I can't say if the patchset will be ready for 3.12 though. The current limits on the amount of data compressed at a time and the amount of delayed allocation sent down at a time were pulled out of the air. Changes to those limits are definitely ok if they are helping specific workloads. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
