Re: [PATCH v11 3/6] virtio-balloon: VIRTIO_BALLOON_F_PAGE_CHUNKS
From: Dave Hansen
Date: Tue Jun 13 2017 - 13:59:21 EST
On 06/13/2017 10:56 AM, Michael S. Tsirkin wrote:
>> +/* The size of one page_bmap used to record inflated/deflated pages. */
>> +#define VIRTIO_BALLOON_PAGE_BMAP_SIZE (8 * PAGE_SIZE)
> At this size, you probably want alloc_pages to avoid kmalloc
> overhead.
For slub, at least, kmalloc() just calls alloc_pages() basically
directly. There's virtually no overhead.