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Message-Id: <20201012125323.17509-20-david@redhat.com>
Date: Mon, 12 Oct 2020 14:53:13 +0200
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org, virtualization@...ts.linux-foundation.org,
Andrew Morton <akpm@...ux-foundation.org>,
"Michael S . Tsirkin" <mst@...hat.com>,
David Hildenbrand <david@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Pankaj Gupta <pankaj.gupta.linux@...il.com>
Subject: [PATCH v1 19/29] virito-mem: existing (un)plug functions are specific to Sub Block Mode (SBM)
Let's rename them accordingly. virtio_mem_plug_request() and
virtio_mem_unplug_request() will be handled separately.
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>
---
drivers/virtio/virtio_mem.c | 90 ++++++++++++++++++-------------------
1 file changed, 43 insertions(+), 47 deletions(-)
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index 73ff6e9ba839..fc2b1ff3beed 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -1075,8 +1075,8 @@ static int virtio_mem_send_unplug_all_request(struct virtio_mem *vm)
* Plug selected subblocks. Updates the plugged state, but not the state
* of the memory block.
*/
-static int virtio_mem_mb_plug_sb(struct virtio_mem *vm, unsigned long mb_id,
- int sb_id, int count)
+static int virtio_mem_sbm_plug_sb(struct virtio_mem *vm, unsigned long mb_id,
+ int sb_id, int count)
{
const uint64_t addr = virtio_mem_mb_id_to_phys(mb_id) +
sb_id * vm->subblock_size;
@@ -1096,8 +1096,8 @@ static int virtio_mem_mb_plug_sb(struct virtio_mem *vm, unsigned long mb_id,
* Unplug selected subblocks. Updates the plugged state, but not the state
* of the memory block.
*/
-static int virtio_mem_mb_unplug_sb(struct virtio_mem *vm, unsigned long mb_id,
- int sb_id, int count)
+static int virtio_mem_sbm_unplug_sb(struct virtio_mem *vm, unsigned long mb_id,
+ int sb_id, int count)
{
const uint64_t addr = virtio_mem_mb_id_to_phys(mb_id) +
sb_id * vm->subblock_size;
@@ -1122,8 +1122,8 @@ static int virtio_mem_mb_unplug_sb(struct virtio_mem *vm, unsigned long mb_id,
*
* Note: can fail after some subblocks were unplugged.
*/
-static int virtio_mem_mb_unplug_any_sb(struct virtio_mem *vm,
- unsigned long mb_id, uint64_t *nb_sb)
+static int virtio_mem_sbm_unplug_any_sb(struct virtio_mem *vm,
+ unsigned long mb_id, uint64_t *nb_sb)
{
int sb_id, count;
int rc;
@@ -1144,7 +1144,7 @@ static int virtio_mem_mb_unplug_any_sb(struct virtio_mem *vm,
sb_id--;
}
- rc = virtio_mem_mb_unplug_sb(vm, mb_id, sb_id, count);
+ rc = virtio_mem_sbm_unplug_sb(vm, mb_id, sb_id, count);
if (rc)
return rc;
*nb_sb -= count;
@@ -1161,18 +1161,18 @@ static int virtio_mem_mb_unplug_any_sb(struct virtio_mem *vm,
*
* Note: can fail after some subblocks were unplugged.
*/
-static int virtio_mem_mb_unplug(struct virtio_mem *vm, unsigned long mb_id)
+static int virtio_mem_sbm_unplug_mb(struct virtio_mem *vm, unsigned long mb_id)
{
uint64_t nb_sb = vm->nb_sb_per_mb;
- return virtio_mem_mb_unplug_any_sb(vm, mb_id, &nb_sb);
+ return virtio_mem_sbm_unplug_any_sb(vm, mb_id, &nb_sb);
}
/*
* Prepare tracking data for the next memory block.
*/
-static int virtio_mem_prepare_next_mb(struct virtio_mem *vm,
- unsigned long *mb_id)
+static int virtio_mem_sbm_prepare_next_mb(struct virtio_mem *vm,
+ unsigned long *mb_id)
{
int rc;
@@ -1200,9 +1200,8 @@ static int virtio_mem_prepare_next_mb(struct virtio_mem *vm,
*
* Will modify the state of the memory block.
*/
-static int virtio_mem_mb_plug_and_add(struct virtio_mem *vm,
- unsigned long mb_id,
- uint64_t *nb_sb)
+static int virtio_mem_sbm_plug_and_add_mb(struct virtio_mem *vm,
+ unsigned long mb_id, uint64_t *nb_sb)
{
const int count = min_t(int, *nb_sb, vm->nb_sb_per_mb);
int rc;
@@ -1214,7 +1213,7 @@ static int virtio_mem_mb_plug_and_add(struct virtio_mem *vm,
* Plug the requested number of subblocks before adding it to linux,
* so that onlining will directly online all plugged subblocks.
*/
- rc = virtio_mem_mb_plug_sb(vm, mb_id, 0, count);
+ rc = virtio_mem_sbm_plug_sb(vm, mb_id, 0, count);
if (rc)
return rc;
@@ -1241,7 +1240,7 @@ static int virtio_mem_mb_plug_and_add(struct virtio_mem *vm,
* TODO: Linux MM does not properly clean up yet in all cases
* where adding of memory failed - especially on -ENOMEM.
*/
- if (virtio_mem_mb_unplug_sb(vm, mb_id, 0, count))
+ if (virtio_mem_sbm_unplug_sb(vm, mb_id, 0, count))
new_state = VIRTIO_MEM_SBM_MB_PLUGGED;
virtio_mem_sbm_set_mb_state(vm, mb_id, new_state);
return rc;
@@ -1259,8 +1258,9 @@ static int virtio_mem_mb_plug_and_add(struct virtio_mem *vm,
*
* Note: Can fail after some subblocks were successfully plugged.
*/
-static int virtio_mem_mb_plug_any_sb(struct virtio_mem *vm, unsigned long mb_id,
- uint64_t *nb_sb, bool online)
+static int virtio_mem_sbm_plug_any_sb(struct virtio_mem *vm,
+ unsigned long mb_id, uint64_t *nb_sb,
+ bool online)
{
unsigned long pfn, nr_pages;
int sb_id, count;
@@ -1279,7 +1279,7 @@ static int virtio_mem_mb_plug_any_sb(struct virtio_mem *vm, unsigned long mb_id,
!virtio_mem_sbm_test_sb_plugged(vm, mb_id, sb_id + count, 1))
count++;
- rc = virtio_mem_mb_plug_sb(vm, mb_id, sb_id, count);
+ rc = virtio_mem_sbm_plug_sb(vm, mb_id, sb_id, count);
if (rc)
return rc;
*nb_sb -= count;
@@ -1323,7 +1323,7 @@ static int virtio_mem_plug_request(struct virtio_mem *vm, uint64_t diff)
/* 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_mb_plug_any_sb(vm, mb_id, &nb_sb, true);
+ rc = virtio_mem_sbm_plug_any_sb(vm, mb_id, &nb_sb, true);
if (rc || !nb_sb)
goto out_unlock;
cond_resched();
@@ -1332,7 +1332,7 @@ static int virtio_mem_plug_request(struct virtio_mem *vm, uint64_t diff)
/* 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_mb_plug_any_sb(vm, mb_id, &nb_sb, false);
+ rc = virtio_mem_sbm_plug_any_sb(vm, mb_id, &nb_sb, false);
if (rc || !nb_sb)
goto out_unlock;
cond_resched();
@@ -1349,7 +1349,7 @@ static int virtio_mem_plug_request(struct virtio_mem *vm, uint64_t diff)
if (!virtio_mem_could_add_memory(vm, memory_block_size_bytes()))
return -ENOSPC;
- rc = virtio_mem_mb_plug_and_add(vm, mb_id, &nb_sb);
+ rc = virtio_mem_sbm_plug_and_add_mb(vm, mb_id, &nb_sb);
if (rc || !nb_sb)
return rc;
cond_resched();
@@ -1360,10 +1360,10 @@ static int virtio_mem_plug_request(struct virtio_mem *vm, uint64_t diff)
if (!virtio_mem_could_add_memory(vm, memory_block_size_bytes()))
return -ENOSPC;
- rc = virtio_mem_prepare_next_mb(vm, &mb_id);
+ rc = virtio_mem_sbm_prepare_next_mb(vm, &mb_id);
if (rc)
return rc;
- rc = virtio_mem_mb_plug_and_add(vm, mb_id, &nb_sb);
+ rc = virtio_mem_sbm_plug_and_add_mb(vm, mb_id, &nb_sb);
if (rc)
return rc;
cond_resched();
@@ -1384,13 +1384,13 @@ static int virtio_mem_plug_request(struct virtio_mem *vm, uint64_t diff)
*
* Note: Can fail after some subblocks were successfully unplugged.
*/
-static int virtio_mem_mb_unplug_any_sb_offline(struct virtio_mem *vm,
- unsigned long mb_id,
- uint64_t *nb_sb)
+static int virtio_mem_sbm_unplug_any_sb_offline(struct virtio_mem *vm,
+ unsigned long mb_id,
+ uint64_t *nb_sb)
{
int rc;
- rc = virtio_mem_mb_unplug_any_sb(vm, mb_id, nb_sb);
+ rc = virtio_mem_sbm_unplug_any_sb(vm, mb_id, nb_sb);
/* some subblocks might have been unplugged even on failure */
if (!virtio_mem_sbm_test_sb_plugged(vm, mb_id, 0, vm->nb_sb_per_mb))
@@ -1422,9 +1422,9 @@ static int virtio_mem_mb_unplug_any_sb_offline(struct virtio_mem *vm,
*
* Will modify the state of the memory block.
*/
-static int virtio_mem_mb_unplug_sb_online(struct virtio_mem *vm,
- unsigned long mb_id, int sb_id,
- int count)
+static int virtio_mem_sbm_unplug_sb_online(struct virtio_mem *vm,
+ unsigned long mb_id, int sb_id,
+ int count)
{
const unsigned long nr_pages = PFN_DOWN(vm->subblock_size) * count;
unsigned long start_pfn;
@@ -1438,7 +1438,7 @@ static int virtio_mem_mb_unplug_sb_online(struct virtio_mem *vm,
return rc;
/* Try to unplug the allocated memory */
- rc = virtio_mem_mb_unplug_sb(vm, mb_id, sb_id, count);
+ rc = virtio_mem_sbm_unplug_sb(vm, mb_id, sb_id, count);
if (rc) {
/* Return the memory to the buddy. */
virtio_mem_fake_online(start_pfn, nr_pages);
@@ -1460,17 +1460,17 @@ static int virtio_mem_mb_unplug_sb_online(struct virtio_mem *vm,
* Note: Can fail after some subblocks were successfully unplugged. Can
* return 0 even if subblocks were busy and could not get unplugged.
*/
-static int virtio_mem_mb_unplug_any_sb_online(struct virtio_mem *vm,
- unsigned long mb_id,
- uint64_t *nb_sb)
+static int virtio_mem_sbm_unplug_any_sb_online(struct virtio_mem *vm,
+ unsigned long mb_id,
+ uint64_t *nb_sb)
{
int rc, sb_id;
/* If possible, try to unplug the complete block in one shot. */
if (*nb_sb >= vm->nb_sb_per_mb &&
virtio_mem_sbm_test_sb_plugged(vm, mb_id, 0, vm->nb_sb_per_mb)) {
- rc = virtio_mem_mb_unplug_sb_online(vm, mb_id, 0,
- vm->nb_sb_per_mb);
+ rc = virtio_mem_sbm_unplug_sb_online(vm, mb_id, 0,
+ vm->nb_sb_per_mb);
if (!rc) {
*nb_sb -= vm->nb_sb_per_mb;
goto unplugged;
@@ -1487,7 +1487,7 @@ static int virtio_mem_mb_unplug_any_sb_online(struct virtio_mem *vm,
if (sb_id < 0)
break;
- rc = virtio_mem_mb_unplug_sb_online(vm, mb_id, sb_id, 1);
+ rc = virtio_mem_sbm_unplug_sb_online(vm, mb_id, sb_id, 1);
if (rc == -EBUSY)
continue;
else if (rc)
@@ -1535,8 +1535,7 @@ static int virtio_mem_unplug_request(struct virtio_mem *vm, uint64_t diff)
/* Try to unplug subblocks of partially plugged offline blocks. */
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);
+ rc = virtio_mem_sbm_unplug_any_sb_offline(vm, mb_id, &nb_sb);
if (rc || !nb_sb)
goto out_unlock;
cond_resched();
@@ -1544,8 +1543,7 @@ static int virtio_mem_unplug_request(struct virtio_mem *vm, uint64_t diff)
/* Try to unplug subblocks of plugged offline blocks. */
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);
+ rc = virtio_mem_sbm_unplug_any_sb_offline(vm, mb_id, &nb_sb);
if (rc || !nb_sb)
goto out_unlock;
cond_resched();
@@ -1559,8 +1557,7 @@ static int virtio_mem_unplug_request(struct virtio_mem *vm, uint64_t diff)
/* Try to unplug subblocks of partially plugged online blocks. */
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);
+ rc = virtio_mem_sbm_unplug_any_sb_online(vm, mb_id, &nb_sb);
if (rc || !nb_sb)
goto out_unlock;
mutex_unlock(&vm->hotplug_mutex);
@@ -1570,8 +1567,7 @@ static int virtio_mem_unplug_request(struct virtio_mem *vm, uint64_t diff)
/* Try to unplug subblocks of plugged online blocks. */
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);
+ rc = virtio_mem_sbm_unplug_any_sb_online(vm, mb_id, &nb_sb);
if (rc || !nb_sb)
goto out_unlock;
mutex_unlock(&vm->hotplug_mutex);
@@ -1596,7 +1592,7 @@ static int virtio_mem_unplug_pending_mb(struct virtio_mem *vm)
int rc;
virtio_mem_sbm_for_each_mb(vm, mb_id, VIRTIO_MEM_SBM_MB_PLUGGED) {
- rc = virtio_mem_mb_unplug(vm, mb_id);
+ rc = virtio_mem_sbm_unplug_mb(vm, mb_id);
if (rc)
return rc;
virtio_mem_sbm_set_mb_state(vm, mb_id,
--
2.26.2
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