The patch titled
Subject: mm/memory_hotplug: remove nid parameter from remove_memory() and friends
has been removed from the -mm tree. Its filename was
mm-memory_hotplug-remove-nid-parameter-from-remove_memory-and-friends.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm/memory_hotplug: remove nid parameter from remove_memory() and friends
There is only a single user remaining. We can simply lookup the nid only
used for node offlining purposes when walking our memory blocks. We don't
expect to remove multi-nid ranges; and if we'd ever do, we most probably
don't care about removing multi-nid ranges that actually result in empty
nodes.
If ever required, we can detect the "multi-nid" scenario and simply try
offlining all online nodes.
Link: https://lkml.kernel.org/r/20210712124052.26491-4-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc)
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Cc: Jason Wang <jasowang@xxxxxxxxxx>
Cc: Nathan Lynch <nathanl@xxxxxxxxxxxxx>
Cc: Laurent Dufour <ldufour@xxxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Scott Cheloha <cheloha@xxxxxxxxxxxxx>
Cc: Anton Blanchard <anton@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jia He <justin.he@xxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Michel Lespinasse <michel@xxxxxxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Pankaj Gupta <pankaj.gupta@xxxxxxxxx>
Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Pierre Morel <pmorel@xxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Sergei Trofimovich <slyfox@xxxxxxxxxx>
Cc: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/pseries/hotplug-memory.c | 9 ++--
drivers/acpi/acpi_memhotplug.c | 7 ---
drivers/dax/kmem.c | 3 -
drivers/virtio/virtio_mem.c | 4 +-
include/linux/memory_hotplug.h | 10 ++---
mm/memory_hotplug.c | 28 ++++++++------
6 files changed, 30 insertions(+), 31 deletions(-)
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c~mm-memory_hotplug-remove-nid-parameter-from-remove_memory-and-friends
+++ a/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -284,7 +284,7 @@ static int pseries_remove_memblock(unsig
{
unsigned long block_sz, start_pfn;
int sections_per_block;
- int i, nid;
+ int i;
start_pfn = base >> PAGE_SHIFT;
@@ -295,10 +295,9 @@ static int pseries_remove_memblock(unsig
block_sz = pseries_memory_block_size();
sections_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
- nid = memory_add_physaddr_to_nid(base);
for (i = 0; i < sections_per_block; i++) {
- __remove_memory(nid, base, MIN_MEMORY_BLOCK_SIZE);
+ __remove_memory(base, MIN_MEMORY_BLOCK_SIZE);
base += MIN_MEMORY_BLOCK_SIZE;
}
@@ -385,7 +384,7 @@ static int dlpar_remove_lmb(struct drmem
block_sz = pseries_memory_block_size();
- __remove_memory(mem_block->nid, lmb->base_addr, block_sz);
+ __remove_memory(lmb->base_addr, block_sz);
put_device(&mem_block->dev);
/* Update memory regions for memory remove */
@@ -658,7 +657,7 @@ static int dlpar_add_lmb(struct drmem_lm
rc = dlpar_online_lmb(lmb);
if (rc) {
- __remove_memory(nid, lmb->base_addr, block_sz);
+ __remove_memory(lmb->base_addr, block_sz);
invalidate_lmb_associativity_index(lmb);
} else {
lmb->flags |= DRCONF_MEM_ASSIGNED;
--- a/drivers/acpi/acpi_memhotplug.c~mm-memory_hotplug-remove-nid-parameter-from-remove_memory-and-friends
+++ a/drivers/acpi/acpi_memhotplug.c
@@ -239,19 +239,14 @@ static int acpi_memory_enable_device(str
static void acpi_memory_remove_memory(struct acpi_memory_device *mem_device)
{
- acpi_handle handle = mem_device->device->handle;
struct acpi_memory_info *info, *n;
- int nid = acpi_get_node(handle);
list_for_each_entry_safe(info, n, &mem_device->res_list, list) {
if (!info->enabled)
continue;
- if (nid == NUMA_NO_NODE)
- nid = memory_add_physaddr_to_nid(info->start_addr);
-
acpi_unbind_memory_blocks(info);
- __remove_memory(nid, info->start_addr, info->length);
+ __remove_memory(info->start_addr, info->length);
list_del(&info->list);
kfree(info);
}
--- a/drivers/dax/kmem.c~mm-memory_hotplug-remove-nid-parameter-from-remove_memory-and-friends
+++ a/drivers/dax/kmem.c
@@ -156,8 +156,7 @@ static void dev_dax_kmem_remove(struct d
if (rc)
continue;
- rc = remove_memory(dev_dax->target_node, range.start,
- range_len(&range));
+ rc = remove_memory(range.start, range_len(&range));
if (rc == 0) {
release_resource(data->res[i]);
kfree(data->res[i]);
--- a/drivers/virtio/virtio_mem.c~mm-memory_hotplug-remove-nid-parameter-from-remove_memory-and-friends
+++ a/drivers/virtio/virtio_mem.c
@@ -677,7 +677,7 @@ static int virtio_mem_remove_memory(stru
dev_dbg(&vm->vdev->dev, "removing memory: 0x%llx - 0x%llx\n", addr,
addr + size - 1);
- rc = remove_memory(vm->nid, addr, size);
+ rc = remove_memory(addr, size);
if (!rc) {
atomic64_sub(size, &vm->offline_size);
/*
@@ -720,7 +720,7 @@ static int virtio_mem_offline_and_remove
"offlining and removing memory: 0x%llx - 0x%llx\n", addr,
addr + size - 1);
- rc = offline_and_remove_memory(vm->nid, addr, size);
+ rc = offline_and_remove_memory(addr, size);
if (!rc) {
atomic64_sub(size, &vm->offline_size);
/*
--- a/include/linux/memory_hotplug.h~mm-memory_hotplug-remove-nid-parameter-from-remove_memory-and-friends
+++ a/include/linux/memory_hotplug.h
@@ -292,9 +292,9 @@ static inline void pgdat_resize_init(str
extern void try_offline_node(int nid);
extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
-extern int remove_memory(int nid, u64 start, u64 size);
-extern void __remove_memory(int nid, u64 start, u64 size);
-extern int offline_and_remove_memory(int nid, u64 start, u64 size);
+extern int remove_memory(u64 start, u64 size);
+extern void __remove_memory(u64 start, u64 size);
+extern int offline_and_remove_memory(u64 start, u64 size);
#else
static inline void try_offline_node(int nid) {}
@@ -304,12 +304,12 @@ static inline int offline_pages(unsigned
return -EINVAL;
}
-static inline int remove_memory(int nid, u64 start, u64 size)
+static inline int remove_memory(u64 start, u64 size)
{
return -EBUSY;
}
-static inline void __remove_memory(int nid, u64 start, u64 size) {}
+static inline void __remove_memory(u64 start, u64 size) {}
#endif /* CONFIG_MEMORY_HOTREMOVE */
extern void set_zone_contiguous(struct zone *zone);
--- a/mm/memory_hotplug.c~mm-memory_hotplug-remove-nid-parameter-from-remove_memory-and-friends
+++ a/mm/memory_hotplug.c
@@ -1739,7 +1739,9 @@ failed_removal:
static int check_memblock_offlined_cb(struct memory_block *mem, void *arg)
{
int ret = !is_memblock_offlined(mem);
+ int *nid = arg;
+ *nid = mem->nid;
if (unlikely(ret)) {
phys_addr_t beginpa, endpa;
@@ -1832,12 +1834,12 @@ void try_offline_node(int nid)
}
EXPORT_SYMBOL(try_offline_node);
-static int __ref try_remove_memory(int nid, u64 start, u64 size)
+static int __ref try_remove_memory(u64 start, u64 size)
{
- int rc = 0;
struct vmem_altmap mhp_altmap = {};
struct vmem_altmap *altmap = NULL;
unsigned long nr_vmemmap_pages;
+ int rc = 0, nid = NUMA_NO_NODE;
BUG_ON(check_hotplug_memory_range(start, size));
@@ -1845,8 +1847,12 @@ static int __ref try_remove_memory(int n
* All memory blocks must be offlined before removing memory. Check
* whether all memory blocks in question are offline and return error
* if this is not the case.
+ *
+ * While at it, determine the nid. Note that if we'd have mixed nodes,
+ * we'd only try to offline the last determined one -- which is good
+ * enough for the cases we care about.
*/
- rc = walk_memory_blocks(start, size, NULL, check_memblock_offlined_cb);
+ rc = walk_memory_blocks(start, size, &nid, check_memblock_offlined_cb);
if (rc)
return rc;
@@ -1895,7 +1901,8 @@ static int __ref try_remove_memory(int n
release_mem_region_adjustable(start, size);
- try_offline_node(nid);
+ if (nid != NUMA_NO_NODE)
+ try_offline_node(nid);
mem_hotplug_done();
return 0;
@@ -1903,7 +1910,6 @@ static int __ref try_remove_memory(int n
/**
* __remove_memory - Remove memory if every memory block is offline
- * @nid: the node ID
* @start: physical address of the region to remove
* @size: size of the region to remove
*
@@ -1911,14 +1917,14 @@ static int __ref try_remove_memory(int n
* and online/offline operations before this call, as required by
* try_offline_node().
*/
-void __remove_memory(int nid, u64 start, u64 size)
+void __remove_memory(u64 start, u64 size)
{
/*
* trigger BUG() if some memory is not offlined prior to calling this
* function
*/
- if (try_remove_memory(nid, start, size))
+ if (try_remove_memory(start, size))
BUG();
}
@@ -1926,12 +1932,12 @@ void __remove_memory(int nid, u64 start,
* Remove memory if every memory block is offline, otherwise return -EBUSY is
* some memory is not offline
*/
-int remove_memory(int nid, u64 start, u64 size)
+int remove_memory(u64 start, u64 size)
{
int rc;
lock_device_hotplug();
- rc = try_remove_memory(nid, start, size);
+ rc = try_remove_memory(start, size);
unlock_device_hotplug();
return rc;
@@ -1991,7 +1997,7 @@ static int try_reonline_memory_block(str
* unplugged all memory (so it's no longer in use) and want to offline + remove
* that memory.
*/
-int offline_and_remove_memory(int nid, u64 start, u64 size)
+int offline_and_remove_memory(u64 start, u64 size)
{
const unsigned long mb_count = size / memory_block_size_bytes();
uint8_t *online_types, *tmp;
@@ -2027,7 +2033,7 @@ int offline_and_remove_memory(int nid, u
* This cannot fail as it cannot get onlined in the meantime.
*/
if (!rc) {
- rc = try_remove_memory(nid, start, size);
+ rc = try_remove_memory(start, size);
if (rc)
pr_err("%s: Failed to remove memory: %d", __func__, rc);
}
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
