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). 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 Thanks for the review, Roger. -- 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/
