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Date: Fri, 16 Oct 2020 16:43:23 +0800
From: Wei Yang <richard.weiyang@...ux.alibaba.com>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
virtualization@...ts.linux-foundation.org,
Andrew Morton <akpm@...ux-foundation.org>,
"Michael S . Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Pankaj Gupta <pankaj.gupta.linux@...il.com>
Subject: Re: [PATCH v1 16/29] virtio-mem: memory block states are specific to
Sub Block Mode (SBM)
On Mon, Oct 12, 2020 at 02:53:10PM +0200, David Hildenbrand wrote:
>let's use a new "sbm" sub-struct to hold SBM-specific state and rename +
>move applicable definitions, frunctions, and variables (related to
>memory block states).
>
>While at it:
>- Drop the "_STATE" part from memory block states
>- Rename "nb_mb_state" to "mb_count"
>- "set_mb_state" / "get_mb_state" vs. "mb_set_state" / "mb_get_state"
>- Don't use lengthy "enum virtio_mem_smb_mb_state", simply use "uint8_t"
>
>Cc: "Michael S. Tsirkin" <mst@...hat.com>
>Cc: Jason Wang <jasowang@...hat.com>
>Cc: Pankaj Gupta <pankaj.gupta.linux@...il.com>
>Signed-off-by: David Hildenbrand <david@...hat.com>
Reviewed-by: Wei Yang <richard.weiyang@...ux.alibaba.com>
>---
> drivers/virtio/virtio_mem.c | 215 ++++++++++++++++++------------------
> 1 file changed, 109 insertions(+), 106 deletions(-)
>
>diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
>index fd8685673fe4..e76d6f769aa5 100644
>--- a/drivers/virtio/virtio_mem.c
>+++ b/drivers/virtio/virtio_mem.c
>@@ -42,20 +42,23 @@ MODULE_PARM_DESC(unplug_online, "Try to unplug online memory");
> * onlined to the same zone - virtio-mem relies on this behavior.
> */
>
>-enum virtio_mem_mb_state {
>+/*
>+ * State of a Linux memory block in SBM.
>+ */
>+enum virtio_mem_sbm_mb_state {
> /* Unplugged, not added to Linux. Can be reused later. */
>- VIRTIO_MEM_MB_STATE_UNUSED = 0,
>+ VIRTIO_MEM_SBM_MB_UNUSED = 0,
> /* (Partially) plugged, not added to Linux. Error on add_memory(). */
>- VIRTIO_MEM_MB_STATE_PLUGGED,
>+ VIRTIO_MEM_SBM_MB_PLUGGED,
> /* Fully plugged, fully added to Linux, offline. */
>- VIRTIO_MEM_MB_STATE_OFFLINE,
>+ VIRTIO_MEM_SBM_MB_OFFLINE,
> /* Partially plugged, fully added to Linux, offline. */
>- VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL,
>+ VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL,
> /* Fully plugged, fully added to Linux, online. */
>- VIRTIO_MEM_MB_STATE_ONLINE,
>+ VIRTIO_MEM_SBM_MB_ONLINE,
> /* Partially plugged, fully added to Linux, online. */
>- VIRTIO_MEM_MB_STATE_ONLINE_PARTIAL,
>- VIRTIO_MEM_MB_STATE_COUNT
>+ VIRTIO_MEM_SBM_MB_ONLINE_PARTIAL,
>+ VIRTIO_MEM_SBM_MB_COUNT
> };
>
> struct virtio_mem {
>@@ -113,9 +116,6 @@ struct virtio_mem {
> */
> const char *resource_name;
>
>- /* Summary of all memory block states. */
>- unsigned long nb_mb_state[VIRTIO_MEM_MB_STATE_COUNT];
>-
> /*
> * We don't want to add too much memory if it's not getting onlined,
> * to avoid running OOM. Besides this threshold, we allow to have at
>@@ -125,27 +125,29 @@ struct virtio_mem {
> atomic64_t offline_size;
> uint64_t offline_threshold;
>
>- /*
>- * One byte state per memory block.
>- *
>- * Allocated via vmalloc(). When preparing new blocks, resized
>- * (alloc+copy+free) when needed (crossing pages with the next mb).
>- * (when crossing pages).
>- *
>- * With 128MB memory blocks, we have states for 512GB of memory in one
>- * page.
>- */
>- uint8_t *mb_state;
>+ struct {
>+ /* Summary of all memory block states. */
>+ unsigned long mb_count[VIRTIO_MEM_SBM_MB_COUNT];
>+
>+ /*
>+ * One byte state per memory block. Allocated via vmalloc().
>+ * Resized (alloc+copy+free) on demand.
>+ *
>+ * With 128 MiB memory blocks, we have states for 512 GiB of
>+ * memory in one 4 KiB page.
>+ */
>+ uint8_t *mb_states;
>+ } sbm;
>
> /*
>- * $nb_sb_per_mb bit per memory block. Handled similar to mb_state.
>+ * $nb_sb_per_mb bit per memory block. Handled similar to sbm.mb_states.
> *
> * With 4MB subblocks, we manage 128GB of memory in one page.
> */
> unsigned long *sb_bitmap;
>
> /*
>- * Mutex that protects the nb_mb_state, mb_state, and sb_bitmap.
>+ * Mutex that protects the sbm.mb_count, sbm.mb_states, and sb_bitmap.
> *
> * When this lock is held the pointers can't change, ONLINE and
> * OFFLINE blocks can't change the state and no subblocks will get
>@@ -254,70 +256,70 @@ static unsigned long virtio_mem_phys_to_sb_id(struct virtio_mem *vm,
> /*
> * Set the state of a memory block, taking care of the state counter.
> */
>-static void virtio_mem_mb_set_state(struct virtio_mem *vm, unsigned long mb_id,
>- enum virtio_mem_mb_state state)
>+static void virtio_mem_sbm_set_mb_state(struct virtio_mem *vm,
>+ unsigned long mb_id, uint8_t state)
> {
> const unsigned long idx = mb_id - vm->first_mb_id;
>- enum virtio_mem_mb_state old_state;
>+ uint8_t old_state;
>
>- old_state = vm->mb_state[idx];
>- vm->mb_state[idx] = state;
>+ old_state = vm->sbm.mb_states[idx];
>+ vm->sbm.mb_states[idx] = state;
>
>- BUG_ON(vm->nb_mb_state[old_state] == 0);
>- vm->nb_mb_state[old_state]--;
>- vm->nb_mb_state[state]++;
>+ BUG_ON(vm->sbm.mb_count[old_state] == 0);
>+ vm->sbm.mb_count[old_state]--;
>+ vm->sbm.mb_count[state]++;
> }
>
> /*
> * Get the state of a memory block.
> */
>-static enum virtio_mem_mb_state virtio_mem_mb_get_state(struct virtio_mem *vm,
>- unsigned long mb_id)
>+static uint8_t virtio_mem_sbm_get_mb_state(struct virtio_mem *vm,
>+ unsigned long mb_id)
> {
> const unsigned long idx = mb_id - vm->first_mb_id;
>
>- return vm->mb_state[idx];
>+ return vm->sbm.mb_states[idx];
> }
>
> /*
> * Prepare the state array for the next memory block.
> */
>-static int virtio_mem_mb_state_prepare_next_mb(struct virtio_mem *vm)
>+static int virtio_mem_sbm_mb_states_prepare_next_mb(struct virtio_mem *vm)
> {
> unsigned long old_bytes = vm->next_mb_id - vm->first_mb_id;
> unsigned long new_bytes = old_bytes + 1;
> int old_pages = PFN_UP(old_bytes);
> int new_pages = PFN_UP(new_bytes);
>- uint8_t *new_mb_state;
>+ uint8_t *new_array;
>
>- if (vm->mb_state && old_pages == new_pages)
>+ if (vm->sbm.mb_states && old_pages == new_pages)
> return 0;
>
>- new_mb_state = vzalloc(new_pages * PAGE_SIZE);
>- if (!new_mb_state)
>+ new_array = vzalloc(new_pages * PAGE_SIZE);
>+ if (!new_array)
> return -ENOMEM;
>
> mutex_lock(&vm->hotplug_mutex);
>- if (vm->mb_state)
>- memcpy(new_mb_state, vm->mb_state, old_pages * PAGE_SIZE);
>- vfree(vm->mb_state);
>- vm->mb_state = new_mb_state;
>+ if (vm->sbm.mb_states)
>+ memcpy(new_array, vm->sbm.mb_states, old_pages * PAGE_SIZE);
>+ vfree(vm->sbm.mb_states);
>+ vm->sbm.mb_states = new_array;
> mutex_unlock(&vm->hotplug_mutex);
>
> return 0;
> }
>
>-#define virtio_mem_for_each_mb_state(_vm, _mb_id, _state) \
>+#define virtio_mem_sbm_for_each_mb(_vm, _mb_id, _state) \
> for (_mb_id = _vm->first_mb_id; \
>- _mb_id < _vm->next_mb_id && _vm->nb_mb_state[_state]; \
>+ _mb_id < _vm->next_mb_id && _vm->sbm.mb_count[_state]; \
> _mb_id++) \
>- if (virtio_mem_mb_get_state(_vm, _mb_id) == _state)
>+ if (virtio_mem_sbm_get_mb_state(_vm, _mb_id) == _state)
>
>-#define virtio_mem_for_each_mb_state_rev(_vm, _mb_id, _state) \
>+#define virtio_mem_sbm_for_each_mb_rev(_vm, _mb_id, _state) \
> for (_mb_id = _vm->next_mb_id - 1; \
>- _mb_id >= _vm->first_mb_id && _vm->nb_mb_state[_state]; \
>+ _mb_id >= _vm->first_mb_id && _vm->sbm.mb_count[_state]; \
> _mb_id--) \
>- if (virtio_mem_mb_get_state(_vm, _mb_id) == _state)
>+ if (virtio_mem_sbm_get_mb_state(_vm, _mb_id) == _state)
>
> /*
> * Mark all selected subblocks plugged.
>@@ -573,9 +575,9 @@ static bool virtio_mem_contains_range(struct virtio_mem *vm, uint64_t start,
> static int virtio_mem_notify_going_online(struct virtio_mem *vm,
> unsigned long mb_id)
> {
>- switch (virtio_mem_mb_get_state(vm, mb_id)) {
>- case VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL:
>- case VIRTIO_MEM_MB_STATE_OFFLINE:
>+ switch (virtio_mem_sbm_get_mb_state(vm, mb_id)) {
>+ case VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL:
>+ case VIRTIO_MEM_SBM_MB_OFFLINE:
> return NOTIFY_OK;
> default:
> break;
>@@ -588,14 +590,14 @@ static int virtio_mem_notify_going_online(struct virtio_mem *vm,
> static void virtio_mem_notify_offline(struct virtio_mem *vm,
> unsigned long mb_id)
> {
>- switch (virtio_mem_mb_get_state(vm, mb_id)) {
>- case VIRTIO_MEM_MB_STATE_ONLINE_PARTIAL:
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL);
>+ switch (virtio_mem_sbm_get_mb_state(vm, mb_id)) {
>+ case VIRTIO_MEM_SBM_MB_ONLINE_PARTIAL:
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL);
> break;
>- case VIRTIO_MEM_MB_STATE_ONLINE:
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE);
>+ case VIRTIO_MEM_SBM_MB_ONLINE:
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE);
> break;
> default:
> BUG();
>@@ -605,13 +607,14 @@ static void virtio_mem_notify_offline(struct virtio_mem *vm,
>
> static void virtio_mem_notify_online(struct virtio_mem *vm, unsigned long mb_id)
> {
>- switch (virtio_mem_mb_get_state(vm, mb_id)) {
>- case VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL:
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_ONLINE_PARTIAL);
>+ switch (virtio_mem_sbm_get_mb_state(vm, mb_id)) {
>+ case VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL:
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_ONLINE_PARTIAL);
> break;
>- case VIRTIO_MEM_MB_STATE_OFFLINE:
>- virtio_mem_mb_set_state(vm, mb_id, VIRTIO_MEM_MB_STATE_ONLINE);
>+ case VIRTIO_MEM_SBM_MB_OFFLINE:
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_ONLINE);
> break;
> default:
> BUG();
>@@ -1160,7 +1163,7 @@ static int virtio_mem_prepare_next_mb(struct virtio_mem *vm,
> return -ENOSPC;
>
> /* Resize the state array if required. */
>- rc = virtio_mem_mb_state_prepare_next_mb(vm);
>+ rc = virtio_mem_sbm_mb_states_prepare_next_mb(vm);
> if (rc)
> return rc;
>
>@@ -1169,7 +1172,7 @@ static int virtio_mem_prepare_next_mb(struct virtio_mem *vm,
> if (rc)
> return rc;
>
>- vm->nb_mb_state[VIRTIO_MEM_MB_STATE_UNUSED]++;
>+ vm->sbm.mb_count[VIRTIO_MEM_SBM_MB_UNUSED]++;
> *mb_id = vm->next_mb_id++;
> return 0;
> }
>@@ -1203,16 +1206,16 @@ static int virtio_mem_mb_plug_and_add(struct virtio_mem *vm,
> * so the memory notifiers will find the block in the right state.
> */
> if (count == vm->nb_sb_per_mb)
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE);
> else
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL);
>
> /* Add the memory block to linux - if that fails, try to unplug. */
> rc = virtio_mem_mb_add(vm, mb_id);
> if (rc) {
>- enum virtio_mem_mb_state new_state = VIRTIO_MEM_MB_STATE_UNUSED;
>+ int new_state = VIRTIO_MEM_SBM_MB_UNUSED;
>
> dev_err(&vm->vdev->dev,
> "adding memory block %lu failed with %d\n", mb_id, rc);
>@@ -1222,8 +1225,8 @@ static int virtio_mem_mb_plug_and_add(struct virtio_mem *vm,
> * where adding of memory failed - especially on -ENOMEM.
> */
> if (virtio_mem_mb_unplug_sb(vm, mb_id, 0, count))
>- new_state = VIRTIO_MEM_MB_STATE_PLUGGED;
>- virtio_mem_mb_set_state(vm, mb_id, new_state);
>+ new_state = VIRTIO_MEM_SBM_MB_PLUGGED;
>+ virtio_mem_sbm_set_mb_state(vm, mb_id, new_state);
> return rc;
> }
>
>@@ -1276,11 +1279,11 @@ static int virtio_mem_mb_plug_any_sb(struct virtio_mem *vm, unsigned long mb_id,
>
> if (virtio_mem_mb_test_sb_plugged(vm, mb_id, 0, vm->nb_sb_per_mb)) {
> if (online)
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_ONLINE);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_ONLINE);
> else
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE);
> }
>
> return 0;
>@@ -1302,8 +1305,8 @@ static int virtio_mem_plug_request(struct virtio_mem *vm, uint64_t diff)
> mutex_lock(&vm->hotplug_mutex);
>
> /* Try to plug subblocks of partially plugged online blocks. */
>- virtio_mem_for_each_mb_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_ONLINE_PARTIAL) {
>+ virtio_mem_sbm_for_each_mb(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_ONLINE_PARTIAL) {
> rc = virtio_mem_mb_plug_any_sb(vm, mb_id, &nb_sb, true);
> if (rc || !nb_sb)
> goto out_unlock;
>@@ -1311,8 +1314,8 @@ static int virtio_mem_plug_request(struct virtio_mem *vm, uint64_t diff)
> }
>
> /* Try to plug subblocks of partially plugged offline blocks. */
>- virtio_mem_for_each_mb_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL) {
>+ virtio_mem_sbm_for_each_mb(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL) {
> rc = virtio_mem_mb_plug_any_sb(vm, mb_id, &nb_sb, false);
> if (rc || !nb_sb)
> goto out_unlock;
>@@ -1326,7 +1329,7 @@ static int virtio_mem_plug_request(struct virtio_mem *vm, uint64_t diff)
> mutex_unlock(&vm->hotplug_mutex);
>
> /* Try to plug and add unused blocks */
>- virtio_mem_for_each_mb_state(vm, mb_id, VIRTIO_MEM_MB_STATE_UNUSED) {
>+ virtio_mem_sbm_for_each_mb(vm, mb_id, VIRTIO_MEM_SBM_MB_UNUSED) {
> if (!virtio_mem_could_add_memory(vm, memory_block_size_bytes()))
> return -ENOSPC;
>
>@@ -1375,8 +1378,8 @@ static int virtio_mem_mb_unplug_any_sb_offline(struct virtio_mem *vm,
>
> /* some subblocks might have been unplugged even on failure */
> if (!virtio_mem_mb_test_sb_plugged(vm, mb_id, 0, vm->nb_sb_per_mb))
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL);
> if (rc)
> return rc;
>
>@@ -1387,8 +1390,8 @@ static int virtio_mem_mb_unplug_any_sb_offline(struct virtio_mem *vm,
> * unplugged. Temporarily drop the mutex, so
> * any pending GOING_ONLINE requests can be serviced/rejected.
> */
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_UNUSED);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_UNUSED);
>
> mutex_unlock(&vm->hotplug_mutex);
> rc = virtio_mem_mb_remove(vm, mb_id);
>@@ -1426,8 +1429,8 @@ static int virtio_mem_mb_unplug_sb_online(struct virtio_mem *vm,
> return rc;
> }
>
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_ONLINE_PARTIAL);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_ONLINE_PARTIAL);
> return 0;
> }
>
>@@ -1487,8 +1490,8 @@ static int virtio_mem_mb_unplug_any_sb_online(struct virtio_mem *vm,
> rc = virtio_mem_mb_offline_and_remove(vm, mb_id);
> mutex_lock(&vm->hotplug_mutex);
> if (!rc)
>- virtio_mem_mb_set_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_UNUSED);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_UNUSED);
> }
>
> return 0;
>@@ -1514,8 +1517,8 @@ static int virtio_mem_unplug_request(struct virtio_mem *vm, uint64_t diff)
> mutex_lock(&vm->hotplug_mutex);
>
> /* Try to unplug subblocks of partially plugged offline blocks. */
>- virtio_mem_for_each_mb_state_rev(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL) {
>+ virtio_mem_sbm_for_each_mb_rev(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL) {
> rc = virtio_mem_mb_unplug_any_sb_offline(vm, mb_id,
> &nb_sb);
> if (rc || !nb_sb)
>@@ -1524,8 +1527,7 @@ static int virtio_mem_unplug_request(struct virtio_mem *vm, uint64_t diff)
> }
>
> /* Try to unplug subblocks of plugged offline blocks. */
>- virtio_mem_for_each_mb_state_rev(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE) {
>+ virtio_mem_sbm_for_each_mb_rev(vm, mb_id, VIRTIO_MEM_SBM_MB_OFFLINE) {
> rc = virtio_mem_mb_unplug_any_sb_offline(vm, mb_id,
> &nb_sb);
> if (rc || !nb_sb)
>@@ -1539,8 +1541,8 @@ static int virtio_mem_unplug_request(struct virtio_mem *vm, uint64_t diff)
> }
>
> /* Try to unplug subblocks of partially plugged online blocks. */
>- virtio_mem_for_each_mb_state_rev(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_ONLINE_PARTIAL) {
>+ virtio_mem_sbm_for_each_mb_rev(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_ONLINE_PARTIAL) {
> rc = virtio_mem_mb_unplug_any_sb_online(vm, mb_id,
> &nb_sb);
> if (rc || !nb_sb)
>@@ -1551,8 +1553,7 @@ static int virtio_mem_unplug_request(struct virtio_mem *vm, uint64_t diff)
> }
>
> /* Try to unplug subblocks of plugged online blocks. */
>- virtio_mem_for_each_mb_state_rev(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_ONLINE) {
>+ virtio_mem_sbm_for_each_mb_rev(vm, mb_id, VIRTIO_MEM_SBM_MB_ONLINE) {
> rc = virtio_mem_mb_unplug_any_sb_online(vm, mb_id,
> &nb_sb);
> if (rc || !nb_sb)
>@@ -1578,11 +1579,12 @@ static int virtio_mem_unplug_pending_mb(struct virtio_mem *vm)
> unsigned long mb_id;
> int rc;
>
>- virtio_mem_for_each_mb_state(vm, mb_id, VIRTIO_MEM_MB_STATE_PLUGGED) {
>+ virtio_mem_sbm_for_each_mb(vm, mb_id, VIRTIO_MEM_SBM_MB_PLUGGED) {
> rc = virtio_mem_mb_unplug(vm, mb_id);
> if (rc)
> return rc;
>- virtio_mem_mb_set_state(vm, mb_id, VIRTIO_MEM_MB_STATE_UNUSED);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_UNUSED);
> }
>
> return 0;
>@@ -1974,11 +1976,12 @@ static void virtio_mem_remove(struct virtio_device *vdev)
> * After we unregistered our callbacks, user space can online partially
> * plugged offline blocks. Make sure to remove them.
> */
>- virtio_mem_for_each_mb_state(vm, mb_id,
>- VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL) {
>+ virtio_mem_sbm_for_each_mb(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_OFFLINE_PARTIAL) {
> rc = virtio_mem_mb_remove(vm, mb_id);
> BUG_ON(rc);
>- virtio_mem_mb_set_state(vm, mb_id, VIRTIO_MEM_MB_STATE_UNUSED);
>+ virtio_mem_sbm_set_mb_state(vm, mb_id,
>+ VIRTIO_MEM_SBM_MB_UNUSED);
> }
> /*
> * After we unregistered our callbacks, user space can no longer
>@@ -2003,7 +2006,7 @@ static void virtio_mem_remove(struct virtio_device *vdev)
> }
>
> /* remove all tracking data - no locking needed */
>- vfree(vm->mb_state);
>+ vfree(vm->sbm.mb_states);
> vfree(vm->sb_bitmap);
>
> /* reset the device and cleanup the queues */
>--
>2.26.2
--
Wei Yang
Help you, Help me
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