The patch titled Subject: mm,sparse: fix deactivate_section for early sections has been removed from the -mm tree. Its filename was mm-sparsemem-support-sub-section-hotplug-fix.patch This patch was dropped because it was folded into mm-sparsemem-support-sub-section-hotplug.patch ------------------------------------------------------ From: Oscar Salvador <osalvador@xxxxxxx> Subject: mm,sparse: fix deactivate_section for early sections deactivate_section checks whether a section is early or not in order to either call free_map_bootmem() or depopulate_section_memmap(). Being the former for sections added at boot time, and the latter for sections hotplugged. The problem is that we zero section_mem_map, so the last early_section() will always report false and the section will not be removed. Fix this checking whether a section is early or not at function entry. Link: http://lkml.kernel.org/r/20190715081549.32577-2-osalvador@xxxxxxx Fixes: mmotm ("mm/sparsemem: Support sub-section hotplug") Signed-off-by: Oscar Salvador <osalvador@xxxxxxx> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx> Reviewed-by: Dan Williams <dan.j.wiliams@xxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/sparse.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/mm/sparse.c~mm-sparsemem-support-sub-section-hotplug-fix +++ a/mm/sparse.c @@ -738,6 +738,7 @@ static void section_deactivate(unsigned DECLARE_BITMAP(map, SUBSECTIONS_PER_SECTION) = { 0 }; DECLARE_BITMAP(tmp, SUBSECTIONS_PER_SECTION) = { 0 }; struct mem_section *ms = __pfn_to_section(pfn); + bool section_is_early = early_section(ms); struct page *memmap = NULL; unsigned long *subsection_map = ms->usage ? &ms->usage->subsection_map[0] : NULL; @@ -772,7 +773,7 @@ static void section_deactivate(unsigned if (bitmap_empty(subsection_map, SUBSECTIONS_PER_SECTION)) { unsigned long section_nr = pfn_to_section_nr(pfn); - if (!early_section(ms)) { + if (!section_is_early) { kfree(ms->usage); ms->usage = NULL; } @@ -780,7 +781,7 @@ static void section_deactivate(unsigned ms->section_mem_map = sparse_encode_mem_map(NULL, section_nr); } - if (early_section(ms) && memmap) + if (section_is_early && memmap) free_map_bootmem(memmap); else depopulate_section_memmap(pfn, nr_pages, altmap); _ Patches currently in -mm which might be from osalvador@xxxxxxx are mm-sparsemem-support-sub-section-hotplug.patch