The patch titled Subject: mm/sparse: optimize sparse_index_alloc has been added to the -mm tree. Its filename is mm-sparse-optimize-sparse_index_alloc.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx> Subject: mm/sparse: optimize sparse_index_alloc With CONFIG_SPARSEMEM_EXTREME, the two levels of memory section descriptors are allocated from slab or bootmem. When allocating from slab, let slab/bootmem allocator clear the memory chunk. We needn't clear it explicitly. Signed-off-by: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx> Reviewed-by: Michal Hocko <mhocko@xxxxxxx> Acked-by: David Rientjes <rientjes@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/sparse.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff -puN mm/sparse.c~mm-sparse-optimize-sparse_index_alloc mm/sparse.c --- a/mm/sparse.c~mm-sparse-optimize-sparse_index_alloc +++ a/mm/sparse.c @@ -65,14 +65,12 @@ static struct mem_section noinline __ini if (slab_is_available()) { if (node_state(nid, N_HIGH_MEMORY)) - section = kmalloc_node(array_size, GFP_KERNEL, nid); + section = kzalloc_node(array_size, GFP_KERNEL, nid); else - section = kmalloc(array_size, GFP_KERNEL); - } else + section = kzalloc(array_size, GFP_KERNEL); + } else { section = alloc_bootmem_node(NODE_DATA(nid), array_size); - - if (section) - memset(section, 0, array_size); + } return section; } _ Subject: Subject: mm/sparse: optimize sparse_index_alloc Patches currently in -mm which might be from shangw@xxxxxxxxxxxxxxxxxx are linux-next.patch mm-slab-remove-duplicate-check.patch mm-buddy-cleanup-on-should_fail_alloc_page.patch mm-compaction-cleanup-on-compaction_deferred.patch memcg-add-mem_cgroup_from_css-helper.patch memcg-add-mem_cgroup_from_css-helper-fix.patch memcg-add-mem_cgroup_from_css-helper-fix-2.patch mm-sparse-optimize-sparse_index_alloc.patch mm-sparse-more-check-on-mem_section-number.patch mm-sparse-remove-index_init_lock.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html