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path: root/drivers/virtio/virtio_mem.c
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Diffstat (limited to 'drivers/virtio/virtio_mem.c')
-rw-r--r--drivers/virtio/virtio_mem.c45
1 files changed, 17 insertions, 28 deletions
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index 1d4b1e25ac8b..c0e6ea6244e4 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -1583,9 +1583,9 @@ static int virtio_mem_sbm_plug_and_add_mb(struct virtio_mem *vm,
* Note: Can fail after some subblocks were successfully plugged.
*/
static int virtio_mem_sbm_plug_any_sb(struct virtio_mem *vm,
- unsigned long mb_id, uint64_t *nb_sb,
- bool online)
+ unsigned long mb_id, uint64_t *nb_sb)
{
+ const int old_state = virtio_mem_sbm_get_mb_state(vm, mb_id);
unsigned long pfn, nr_pages;
int sb_id, count;
int rc;
@@ -1607,7 +1607,7 @@ static int virtio_mem_sbm_plug_any_sb(struct virtio_mem *vm,
if (rc)
return rc;
*nb_sb -= count;
- if (!online)
+ if (old_state == VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL)
continue;
/* fake-online the pages if the memory block is online */
@@ -1617,23 +1617,21 @@ static int virtio_mem_sbm_plug_any_sb(struct virtio_mem *vm,
virtio_mem_fake_online(pfn, nr_pages);
}
- if (virtio_mem_sbm_test_sb_plugged(vm, mb_id, 0, vm->sbm.sbs_per_mb)) {
- if (online)
- virtio_mem_sbm_set_mb_state(vm, mb_id,
- VIRTIO_MEM_SBM_MB_ONLINE);
- else
- virtio_mem_sbm_set_mb_state(vm, mb_id,
- VIRTIO_MEM_SBM_MB_OFFLINE);
- }
+ if (virtio_mem_sbm_test_sb_plugged(vm, mb_id, 0, vm->sbm.sbs_per_mb))
+ virtio_mem_sbm_set_mb_state(vm, mb_id, old_state - 1);
return 0;
}
static int virtio_mem_sbm_plug_request(struct virtio_mem *vm, uint64_t diff)
{
+ const int mb_states[] = {
+ VIRTIO_MEM_SBM_MB_ONLINE_PARTIAL,
+ VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL,
+ };
uint64_t nb_sb = diff / vm->sbm.sb_size;
unsigned long mb_id;
- int rc;
+ int rc, i;
if (!nb_sb)
return 0;
@@ -1641,22 +1639,13 @@ static int virtio_mem_sbm_plug_request(struct virtio_mem *vm, uint64_t diff)
/* Don't race with onlining/offlining */
mutex_lock(&vm->hotplug_mutex);
- /* Try to plug subblocks of partially plugged online blocks. */
- virtio_mem_sbm_for_each_mb(vm, mb_id,
- VIRTIO_MEM_SBM_MB_ONLINE_PARTIAL) {
- rc = virtio_mem_sbm_plug_any_sb(vm, mb_id, &nb_sb, true);
- if (rc || !nb_sb)
- goto out_unlock;
- cond_resched();
- }
-
- /* Try to plug subblocks of partially plugged offline blocks. */
- virtio_mem_sbm_for_each_mb(vm, mb_id,
- VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL) {
- rc = virtio_mem_sbm_plug_any_sb(vm, mb_id, &nb_sb, false);
- if (rc || !nb_sb)
- goto out_unlock;
- cond_resched();
+ for (i = 0; i < ARRAY_SIZE(mb_states); i++) {
+ virtio_mem_sbm_for_each_mb(vm, mb_id, mb_states[i]) {
+ rc = virtio_mem_sbm_plug_any_sb(vm, mb_id, &nb_sb);
+ if (rc || !nb_sb)
+ goto out_unlock;
+ cond_resched();
+ }
}
/*