>>> On 28.02.13 at 11:28, Roger Pau Monne <roger....@citrix.com> wrote: > This series contains the initial implementation of indirect > descriptors for Linux blkback/blkfront. > > Patches 1, 2, 3, 4 and 5 are bug fixes and minor optimizations. > > Patch 6 contains a LRU implementation for blkback that will be needed > when using indirect descriptors (since we are no longer able to map > all possible grants blkfront might use).
Considering this, ... > Patch 7 is an addition to the print stats function in blkback in order > to print information regarding persistent grant usage. > > Patches 8, 9, 10 and 11 are preparatory work for indirect descriptors > implementation, mainly make blkback use dynamic memory and remove the > shared blkbk structure, so each blkback instance has it's own list of > free requests, pages, handles and so on. > > Finally patch 12 contains the indirect descriptors implementation. > > I've also pushed this series to the following git repository: > > git://xenbits.xen.org/people/royger/linux.git xen-block-indirect > > Performance benefit of this series can be seen in the following graph: > > http://xenbits.xen.org/people/royger/plot_indirect.png ... would you happen to also have a comparison with using indirect descriptors but not persistent grants? IOW I'm wondering about the hit rate on the persistently mapped grants, especially when blkfront really saturates the added bandwidth. Jan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
