On Thu, Oct 17, 2024 at 02:44:49PM +0800, suhua wrote: > Subject: memblock: Uniform initialization all reserved pages to MIGRATE_MOVABLE I'd suggest: memblock: uniformly initialize all reserved pages to MIGRATE_MOVABLE > Currently when CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set, the reserved > pages are initialized to MIGRATE_MOVABLE by default in memmap_init. > > Reserved memory mainly stores the metadata of struct page. When > HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON=Y and hugepages are allocated, > the memory occupied by the struct page metadata will be freed. The struct page metadata is not freed with HVO, it is rather pages used for vmemmap. > Before this patch: > when CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set, the freed memory was > placed on the Movable list; > When CONFIG_DEFERRED_STRUCT_PAGE_INIT=Y, the freed memory was placed on > the Unmovable list. > > After this patch, the freed memory is placed on the Movable list > regardless of whether CONFIG_DEFERRED_STRUCT_PAGE_INIT is set. > > Eg: Please add back the description of the hardware used for this test and how much huge pages were allocated at boot. > echo 500000 > /proc/sys/vm/nr_hugepages > cat /proc/pagetypeinfo > > before： > Free pages count per migrate type at order 0 1 2 3 4 5 6 7 8 9 10 > … > Node 0, zone Normal, type Unmovable 51 2 1 28 53 35 35 43 40 69 3852 > Node 0, zone Normal, type Movable 6485 4610 666 202 200 185 208 87 54 2 240 > Node 0, zone Normal, type Reclaimable 2 2 1 23 13 1 2 1 0 1 0 > Node 0, zone Normal, type HighAtomic 0 0 0 0 0 0 0 0 0 0 0 > Node 0, zone Normal, type Isolate 0 0 0 0 0 0 0 0 0 0 0 > Unmovable ≈ 15GB > > after： > Free pages count per migrate type at order 0 1 2 3 4 5 6 7 8 9 10 > … > Node 0, zone Normal, type Unmovable 0 1 1 0 0 0 0 1 1 1 0 > Node 0, zone Normal, type Movable 1563 4107 1119 189 256 368 286 132 109 4 3841 > Node 0, zone Normal, type Reclaimable 2 2 1 23 13 1 2 1 0 1 0 > Node 0, zone Normal, type HighAtomic 0 0 0 0 0 0 0 0 0 0 0 > Node 0, zone Normal, type Isolate 0 0 0 0 0 0 0 0 0 0 0 > > Signed-off-by: suhua <suhua1@xxxxxxxxxxxx> checkpatch.pl gives this warning: WARNING: From:/Signed-off-by: email address mismatch: 'From: suhua <suhua.tanke@xxxxxxxxx>' != 'Signed-off-by: suhua <suhua1@xxxxxxxxxxxx>' Please update the commit authorship or signed-off to match. Also, Signed-off-by should use a known identity, i.e. Name Lastname. > --- > mm/mm_init.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/mm/mm_init.c b/mm/mm_init.c > index 4ba5607aaf19..6dbf2df23eee 100644 > --- a/mm/mm_init.c > +++ b/mm/mm_init.c > @@ -722,6 +722,10 @@ static void __meminit init_reserved_page(unsigned long pfn, int nid) > if (zone_spans_pfn(zone, pfn)) > break; > } > + > + if (pageblock_aligned(pfn)) > + set_pageblock_migratetype(pfn_to_page(pfn), MIGRATE_MOVABLE); > + > __init_single_page(pfn_to_page(pfn), pfn, zid, nid); > } > #else > -- > 2.34.1 > -- Sincerely yours, Mike.
