Most important part of this patchset is the introducing of what I call detached freelist, for improving SLUB performance of object freeing in the "slowpath" of kmem_cache_free_bulk. Tagging patchset with "V4" to avoid confusion with "V2": (V2) http://thread.gmane.org/gmane.linux.kernel.mm/137469 Addressing comments from: ("V3") http://thread.gmane.org/gmane.linux.kernel.mm/139268 I've added Christoph Lameter's ACKs from prev review. * Only patch 5 is changed significantly and needs review. * Benchmarked, performance is the same Notes for patches: * First two patches (from Christoph) are already in AKPM MMOTS. * Patch 3 is trivial * Patch 4 is a repost, implements bulking for SLAB. - http://thread.gmane.org/gmane.linux.kernel.mm/138220 * Patch 5 and 6 are the important patches - Patch 5 handle "freelists" in slab_free() and __slab_free(). - Patch 6 intro detached freelists, and significant performance improvement Patches should be ready for the MM-tree, as I'm now handling kmem debug support. Based on top of commit 519f526d39 in net-next, but I've tested it applies on top of mmotm-2015-09-18-16-08. The benchmarking tools are avail here: https://github.com/netoptimizer/prototype-kernel/tree/master/kernel/mm See: slab_bulk_test0{1,2,3}.c This was joint work with Alexander Duyck while still at Red Hat. This patchset is part of my network stack use-case. I'll post the network side of the patchset as soon as I've cleaned it up, rebased it on net-next and re-run all the benchmarks. --- Christoph Lameter (2): slub: create new ___slab_alloc function that can be called with irqs disabled slub: Avoid irqoff/on in bulk allocation Jesper Dangaard Brouer (4): slub: mark the dangling ifdef #else of CONFIG_SLUB_DEBUG slab: implement bulking for SLAB allocator slub: support for bulk free with SLUB freelists slub: optimize bulk slowpath free by detached freelist mm/slab.c | 87 ++++++++++++++------ mm/slub.c | 263 +++++++++++++++++++++++++++++++++++++++++++------------------ 2 files changed, 249 insertions(+), 101 deletions(-) -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat Author of http://www.iptv-analyzer.org LinkedIn: http://www.linkedin.com/in/brouer -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>