diff options
| -rw-r--r-- | drivers/firmware/qemu_fw_cfg.c | 8 | ||||
| -rw-r--r-- | drivers/vhost/scsi.c | 4 | ||||
| -rw-r--r-- | drivers/vhost/vhost.c | 4 | ||||
| -rw-r--r-- | drivers/vhost/vsock.c | 2 | ||||
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 24 | ||||
| -rw-r--r-- | include/linux/balloon_compaction.h | 35 | ||||
| -rw-r--r-- | mm/balloon_compaction.c | 28 |
7 files changed, 84 insertions, 21 deletions
diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c index 0e2011636fbb..5cfe39f7a45f 100644 --- a/drivers/firmware/qemu_fw_cfg.c +++ b/drivers/firmware/qemu_fw_cfg.c @@ -10,9 +10,9 @@ * and select subsets of aarch64), a Device Tree node (on arm), or using * a kernel module (or command line) parameter with the following syntax: * - * [fw_cfg.]ioport=<size>@<base>[:<ctrl_off>:<data_off>] + * [qemu_fw_cfg.]ioport=<size>@<base>[:<ctrl_off>:<data_off>] * or - * [fw_cfg.]mmio=<size>@<base>[:<ctrl_off>:<data_off>] + * [qemu_fw_cfg.]mmio=<size>@<base>[:<ctrl_off>:<data_off>] * * where: * <size> := size of ioport or mmio range @@ -21,9 +21,9 @@ * <data_off> := (optional) offset of data register * * e.g.: - * fw_cfg.ioport=2@0x510:0:1 (the default on x86) + * qemu_fw_cfg.ioport=2@0x510:0:1 (the default on x86) * or - * fw_cfg.mmio=0xA@0x9020000:8:0 (the default on arm) + * qemu_fw_cfg.mmio=0xA@0x9020000:8:0 (the default on arm) */ #include <linux/module.h> diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index 35e929f132e8..1bc9be829fb4 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -519,7 +519,7 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work) vs_completion_work); DECLARE_BITMAP(signal, VHOST_SCSI_MAX_VQ); struct virtio_scsi_cmd_resp v_rsp; - struct vhost_scsi_cmd *cmd; + struct vhost_scsi_cmd *cmd, *t; struct llist_node *llnode; struct se_cmd *se_cmd; struct iov_iter iov_iter; @@ -527,7 +527,7 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work) bitmap_zero(signal, VHOST_SCSI_MAX_VQ); llnode = llist_del_all(&vs->vs_completion_list); - llist_for_each_entry(cmd, llnode, tvc_completion_list) { + llist_for_each_entry_safe(cmd, t, llnode, tvc_completion_list) { se_cmd = &cmd->tvc_se_cmd; pr_debug("%s tv_cmd %p resid %u status %#02x\n", __func__, diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index d6dbb28245e6..33ac2b186b85 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1175,7 +1175,7 @@ static int iotlb_access_ok(struct vhost_virtqueue *vq, { const struct vhost_umem_node *node; struct vhost_umem *umem = vq->iotlb; - u64 s = 0, size, orig_addr = addr; + u64 s = 0, size, orig_addr = addr, last = addr + len - 1; if (vhost_vq_meta_fetch(vq, addr, len, type)) return true; @@ -1183,7 +1183,7 @@ static int iotlb_access_ok(struct vhost_virtqueue *vq, while (len > s) { node = vhost_umem_interval_tree_iter_first(&umem->umem_tree, addr, - addr + len - 1); + last); if (node == NULL || node->start > addr) { vhost_iotlb_miss(vq, addr, access); return false; diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index c9de9c41aa97..5a5e981bd8e4 100644 --- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -518,6 +518,8 @@ static int vhost_vsock_dev_open(struct inode *inode, struct file *file) goto out; } + vsock->guest_cid = 0; /* no CID assigned yet */ + atomic_set(&vsock->queued_replies, 0); vqs[VSOCK_VQ_TX] = &vsock->vqs[VSOCK_VQ_TX]; diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index f0b3a0b9d42f..7960746f7597 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -143,16 +143,17 @@ static void set_page_pfns(struct virtio_balloon *vb, static unsigned fill_balloon(struct virtio_balloon *vb, size_t num) { - struct balloon_dev_info *vb_dev_info = &vb->vb_dev_info; unsigned num_allocated_pages; + unsigned num_pfns; + struct page *page; + LIST_HEAD(pages); /* We can only do one array worth at a time. */ num = min(num, ARRAY_SIZE(vb->pfns)); - mutex_lock(&vb->balloon_lock); - for (vb->num_pfns = 0; vb->num_pfns < num; - vb->num_pfns += VIRTIO_BALLOON_PAGES_PER_PAGE) { - struct page *page = balloon_page_enqueue(vb_dev_info); + for (num_pfns = 0; num_pfns < num; + num_pfns += VIRTIO_BALLOON_PAGES_PER_PAGE) { + struct page *page = balloon_page_alloc(); if (!page) { dev_info_ratelimited(&vb->vdev->dev, @@ -162,6 +163,19 @@ static unsigned fill_balloon(struct virtio_balloon *vb, size_t num) msleep(200); break; } + + balloon_page_push(&pages, page); + } + + mutex_lock(&vb->balloon_lock); + + vb->num_pfns = 0; + + while ((page = balloon_page_pop(&pages))) { + balloon_page_enqueue(&vb->vb_dev_info, page); + + vb->num_pfns += VIRTIO_BALLOON_PAGES_PER_PAGE; + set_page_pfns(vb, vb->pfns + vb->num_pfns, page); vb->num_pages += VIRTIO_BALLOON_PAGES_PER_PAGE; if (!virtio_has_feature(vb->vdev, diff --git a/include/linux/balloon_compaction.h b/include/linux/balloon_compaction.h index fbbe6da40fed..53051f3d8f25 100644 --- a/include/linux/balloon_compaction.h +++ b/include/linux/balloon_compaction.h @@ -50,6 +50,7 @@ #include <linux/gfp.h> #include <linux/err.h> #include <linux/fs.h> +#include <linux/list.h> /* * Balloon device information descriptor. @@ -67,7 +68,9 @@ struct balloon_dev_info { struct inode *inode; }; -extern struct page *balloon_page_enqueue(struct balloon_dev_info *b_dev_info); +extern struct page *balloon_page_alloc(void); +extern void balloon_page_enqueue(struct balloon_dev_info *b_dev_info, + struct page *page); extern struct page *balloon_page_dequeue(struct balloon_dev_info *b_dev_info); static inline void balloon_devinfo_init(struct balloon_dev_info *balloon) @@ -193,4 +196,34 @@ static inline gfp_t balloon_mapping_gfp_mask(void) } #endif /* CONFIG_BALLOON_COMPACTION */ + +/* + * balloon_page_push - insert a page into a page list. + * @head : pointer to list + * @page : page to be added + * + * Caller must ensure the page is private and protect the list. + */ +static inline void balloon_page_push(struct list_head *pages, struct page *page) +{ + list_add(&page->lru, pages); +} + +/* + * balloon_page_pop - remove a page from a page list. + * @head : pointer to list + * @page : page to be added + * + * Caller must ensure the page is private and protect the list. + */ +static inline struct page *balloon_page_pop(struct list_head *pages) +{ + struct page *page = list_first_entry_or_null(pages, struct page, lru); + + if (!page) + return NULL; + + list_del(&page->lru); + return page; +} #endif /* _LINUX_BALLOON_COMPACTION_H */ diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c index 68d28924ba79..ef858d547e2d 100644 --- a/mm/balloon_compaction.c +++ b/mm/balloon_compaction.c @@ -11,22 +11,37 @@ #include <linux/balloon_compaction.h> /* + * balloon_page_alloc - allocates a new page for insertion into the balloon + * page list. + * + * Driver must call it to properly allocate a new enlisted balloon page. + * Driver must call balloon_page_enqueue before definitively removing it from + * the guest system. This function returns the page address for the recently + * allocated page or NULL in the case we fail to allocate a new page this turn. + */ +struct page *balloon_page_alloc(void) +{ + struct page *page = alloc_page(balloon_mapping_gfp_mask() | + __GFP_NOMEMALLOC | __GFP_NORETRY); + return page; +} +EXPORT_SYMBOL_GPL(balloon_page_alloc); + +/* * balloon_page_enqueue - allocates a new page and inserts it into the balloon * page list. * @b_dev_info: balloon device descriptor where we will insert a new page to + * @page: new page to enqueue - allocated using balloon_page_alloc. * - * Driver must call it to properly allocate a new enlisted balloon page + * Driver must call it to properly enqueue a new allocated balloon page * before definitively removing it from the guest system. * This function returns the page address for the recently enqueued page or * NULL in the case we fail to allocate a new page this turn. */ -struct page *balloon_page_enqueue(struct balloon_dev_info *b_dev_info) +void balloon_page_enqueue(struct balloon_dev_info *b_dev_info, + struct page *page) { unsigned long flags; - struct page *page = alloc_page(balloon_mapping_gfp_mask() | - __GFP_NOMEMALLOC | __GFP_NORETRY); - if (!page) - return NULL; /* * Block others from accessing the 'page' when we get around to @@ -39,7 +54,6 @@ struct page *balloon_page_enqueue(struct balloon_dev_info *b_dev_info) __count_vm_event(BALLOON_INFLATE); spin_unlock_irqrestore(&b_dev_info->pages_lock, flags); unlock_page(page); - return page; } EXPORT_SYMBOL_GPL(balloon_page_enqueue); |