On Mon, Oct 12, 2020 at 02:52:55PM +0200, David Hildenbrand wrote:
>Let's determine the target nid only once in case we have none specified -
>usually, we'll end up with node 0 either way.
>
>Cc: "Michael S. Tsirkin" <m...@redhat.com>
>Cc: Jason Wang <jasow...@redhat.com>
>Cc: Pankaj Gupta <pankaj.gupta.li...@gmail.com>
>Signed-off-by: David Hildenbrand <da...@redhat.com>
Reviewed-by: Wei Yang <richard.weiy...@linux.alibaba.com>
>---
> drivers/virtio/virtio_mem.c | 28 +++++++++++-----------------
> 1 file changed, 11 insertions(+), 17 deletions(-)
>
>diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
>index ba4de598f663..a1f5bf7a571a 100644
>--- a/drivers/virtio/virtio_mem.c
>+++ b/drivers/virtio/virtio_mem.c
>@@ -70,7 +70,7 @@ struct virtio_mem {
>
> /* The device block size (for communicating with the device). */
> uint64_t device_block_size;
>- /* The translated node id. NUMA_NO_NODE in case not specified. */
>+ /* The determined node id for all memory of the device. */
> int nid;
> /* Physical start address of the memory region. */
> uint64_t addr;
>@@ -406,10 +406,6 @@ static int virtio_mem_sb_bitmap_prepare_next_mb(struct
>virtio_mem *vm)
> static int virtio_mem_mb_add(struct virtio_mem *vm, unsigned long mb_id)
> {
> const uint64_t addr = virtio_mem_mb_id_to_phys(mb_id);
>- int nid = vm->nid;
>-
>- if (nid == NUMA_NO_NODE)
>- nid = memory_add_physaddr_to_nid(addr);
>
> /*
> * When force-unloading the driver and we still have memory added to
>@@ -423,7 +419,8 @@ static int virtio_mem_mb_add(struct virtio_mem *vm,
>unsigned long mb_id)
> }
>
> dev_dbg(&vm->vdev->dev, "adding memory block: %lu\n", mb_id);
>- return add_memory_driver_managed(nid, addr, memory_block_size_bytes(),
>+ return add_memory_driver_managed(vm->nid, addr,
>+ memory_block_size_bytes(),
> vm->resource_name,
> MEMHP_MERGE_RESOURCE);
> }
>@@ -440,13 +437,9 @@ static int virtio_mem_mb_add(struct virtio_mem *vm,
>unsigned long mb_id)
> static int virtio_mem_mb_remove(struct virtio_mem *vm, unsigned long mb_id)
> {
> const uint64_t addr = virtio_mem_mb_id_to_phys(mb_id);
>- int nid = vm->nid;
>-
>- if (nid == NUMA_NO_NODE)
>- nid = memory_add_physaddr_to_nid(addr);
>
> dev_dbg(&vm->vdev->dev, "removing memory block: %lu\n", mb_id);
>- return remove_memory(nid, addr, memory_block_size_bytes());
>+ return remove_memory(vm->nid, addr, memory_block_size_bytes());
> }
>
> /*
>@@ -461,14 +454,11 @@ static int virtio_mem_mb_offline_and_remove(struct
>virtio_mem *vm,
> unsigned long mb_id)
> {
> const uint64_t addr = virtio_mem_mb_id_to_phys(mb_id);
>- int nid = vm->nid;
>-
>- if (nid == NUMA_NO_NODE)
>- nid = memory_add_physaddr_to_nid(addr);
>
> dev_dbg(&vm->vdev->dev, "offlining and removing memory block: %lu\n",
> mb_id);
>- return offline_and_remove_memory(nid, addr, memory_block_size_bytes());
>+ return offline_and_remove_memory(vm->nid, addr,
>+ memory_block_size_bytes());
> }
>
> /*
>@@ -1659,6 +1649,10 @@ static int virtio_mem_init(struct virtio_mem *vm)
> virtio_cread_le(vm->vdev, struct virtio_mem_config, region_size,
> &vm->region_size);
>
>+ /* Determine the nid for the device based on the lowest address. */
>+ if (vm->nid == NUMA_NO_NODE)
>+ vm->nid = memory_add_physaddr_to_nid(vm->addr);
>+
> /*
> * We always hotplug memory in memory block granularity. This way,
> * we have to wait for exactly one memory block to online.
>@@ -1707,7 +1701,7 @@ static int virtio_mem_init(struct virtio_mem *vm)
> memory_block_size_bytes());
> dev_info(&vm->vdev->dev, "subblock size: 0x%llx",
> (unsigned long long)vm->subblock_size);
>- if (vm->nid != NUMA_NO_NODE)
>+ if (vm->nid != NUMA_NO_NODE && IS_ENABLED(CONFIG_NUMA))
> dev_info(&vm->vdev->dev, "nid: %d", vm->nid);
>
> return 0;
>--
>2.26.2
--
Wei Yang
Help you, Help me
