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-rw-r--r--drivers/misc/vmw_balloon.c376
1 files changed, 258 insertions, 118 deletions
diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
index aed95251072b..01519ff443dd 100644
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -47,7 +47,7 @@
MODULE_AUTHOR("VMware, Inc.");
MODULE_DESCRIPTION("VMware Memory Control (Balloon) Driver");
-MODULE_VERSION("1.3.4.0-k");
+MODULE_VERSION("1.4.0.0-k");
MODULE_ALIAS("dmi:*:svnVMware*:*");
MODULE_ALIAS("vmware_vmmemctl");
MODULE_LICENSE("GPL");
@@ -102,11 +102,16 @@ enum vmwballoon_capabilities {
* Bit 0 is reserved and not associated to any capability.
*/
VMW_BALLOON_BASIC_CMDS = (1 << 1),
- VMW_BALLOON_BATCHED_CMDS = (1 << 2)
+ VMW_BALLOON_BATCHED_CMDS = (1 << 2),
+ VMW_BALLOON_BATCHED_2M_CMDS = (1 << 3),
};
#define VMW_BALLOON_CAPABILITIES (VMW_BALLOON_BASIC_CMDS \
- | VMW_BALLOON_BATCHED_CMDS)
+ | VMW_BALLOON_BATCHED_CMDS \
+ | VMW_BALLOON_BATCHED_2M_CMDS)
+
+#define VMW_BALLOON_2M_SHIFT (9)
+#define VMW_BALLOON_NUM_PAGE_SIZES (2)
/*
* Backdoor commands availability:
@@ -117,14 +122,19 @@ enum vmwballoon_capabilities {
* LOCK and UNLOCK commands,
* VMW_BALLOON_BATCHED_CMDS:
* BATCHED_LOCK and BATCHED_UNLOCK commands.
+ * VMW BALLOON_BATCHED_2M_CMDS:
+ * BATCHED_2M_LOCK and BATCHED_2M_UNLOCK commands.
*/
-#define VMW_BALLOON_CMD_START 0
-#define VMW_BALLOON_CMD_GET_TARGET 1
-#define VMW_BALLOON_CMD_LOCK 2
-#define VMW_BALLOON_CMD_UNLOCK 3
-#define VMW_BALLOON_CMD_GUEST_ID 4
-#define VMW_BALLOON_CMD_BATCHED_LOCK 6
-#define VMW_BALLOON_CMD_BATCHED_UNLOCK 7
+#define VMW_BALLOON_CMD_START 0
+#define VMW_BALLOON_CMD_GET_TARGET 1
+#define VMW_BALLOON_CMD_LOCK 2
+#define VMW_BALLOON_CMD_UNLOCK 3
+#define VMW_BALLOON_CMD_GUEST_ID 4
+#define VMW_BALLOON_CMD_BATCHED_LOCK 6
+#define VMW_BALLOON_CMD_BATCHED_UNLOCK 7
+#define VMW_BALLOON_CMD_BATCHED_2M_LOCK 8
+#define VMW_BALLOON_CMD_BATCHED_2M_UNLOCK 9
+
/* error codes */
#define VMW_BALLOON_SUCCESS 0
@@ -152,9 +162,6 @@ enum vmwballoon_capabilities {
* +-------------+----------+--------+
* 64 PAGE_SHIFT 6 0
*
- * For now only 4K pages are supported, but we can easily support large pages
- * by using bits in the reserved field.
- *
* The reserved field should be set to 0.
*/
#define VMW_BALLOON_BATCH_MAX_PAGES (PAGE_SIZE / sizeof(u64))
@@ -209,19 +216,19 @@ struct vmballoon_stats {
unsigned int timer;
/* allocation statistics */
- unsigned int alloc;
- unsigned int alloc_fail;
+ unsigned int alloc[VMW_BALLOON_NUM_PAGE_SIZES];
+ unsigned int alloc_fail[VMW_BALLOON_NUM_PAGE_SIZES];
unsigned int sleep_alloc;
unsigned int sleep_alloc_fail;
- unsigned int refused_alloc;
- unsigned int refused_free;
- unsigned int free;
+ unsigned int refused_alloc[VMW_BALLOON_NUM_PAGE_SIZES];
+ unsigned int refused_free[VMW_BALLOON_NUM_PAGE_SIZES];
+ unsigned int free[VMW_BALLOON_NUM_PAGE_SIZES];
/* monitor operations */
- unsigned int lock;
- unsigned int lock_fail;
- unsigned int unlock;
- unsigned int unlock_fail;
+ unsigned int lock[VMW_BALLOON_NUM_PAGE_SIZES];
+ unsigned int lock_fail[VMW_BALLOON_NUM_PAGE_SIZES];
+ unsigned int unlock[VMW_BALLOON_NUM_PAGE_SIZES];
+ unsigned int unlock_fail[VMW_BALLOON_NUM_PAGE_SIZES];
unsigned int target;
unsigned int target_fail;
unsigned int start;
@@ -240,19 +247,25 @@ struct vmballoon;
struct vmballoon_ops {
void (*add_page)(struct vmballoon *b, int idx, struct page *p);
int (*lock)(struct vmballoon *b, unsigned int num_pages,
- unsigned int *target);
+ bool is_2m_pages, unsigned int *target);
int (*unlock)(struct vmballoon *b, unsigned int num_pages,
- unsigned int *target);
+ bool is_2m_pages, unsigned int *target);
};
-struct vmballoon {
-
+struct vmballoon_page_size {
/* list of reserved physical pages */
struct list_head pages;
/* transient list of non-balloonable pages */
struct list_head refused_pages;
unsigned int n_refused_pages;
+};
+
+struct vmballoon {
+ struct vmballoon_page_size page_sizes[VMW_BALLOON_NUM_PAGE_SIZES];
+
+ /* supported page sizes. 1 == 4k pages only, 2 == 4k and 2m pages */
+ unsigned supported_page_sizes;
/* balloon size in pages */
unsigned int size;
@@ -297,6 +310,7 @@ static struct vmballoon balloon;
static bool vmballoon_send_start(struct vmballoon *b, unsigned long req_caps)
{
unsigned long status, capabilities, dummy = 0;
+ bool success;
STATS_INC(b->stats.start);
@@ -305,15 +319,26 @@ static bool vmballoon_send_start(struct vmballoon *b, unsigned long req_caps)
switch (status) {
case VMW_BALLOON_SUCCESS_WITH_CAPABILITIES:
b->capabilities = capabilities;
- return true;
+ success = true;
+ break;
case VMW_BALLOON_SUCCESS:
b->capabilities = VMW_BALLOON_BASIC_CMDS;
- return true;
+ success = true;
+ break;
+ default:
+ success = false;
}
- pr_debug("%s - failed, hv returns %ld\n", __func__, status);
- STATS_INC(b->stats.start_fail);
- return false;
+ if (b->capabilities & VMW_BALLOON_BATCHED_2M_CMDS)
+ b->supported_page_sizes = 2;
+ else
+ b->supported_page_sizes = 1;
+
+ if (!success) {
+ pr_debug("%s - failed, hv returns %ld\n", __func__, status);
+ STATS_INC(b->stats.start_fail);
+ }
+ return success;
}
static bool vmballoon_check_status(struct vmballoon *b, unsigned long status)
@@ -354,6 +379,14 @@ static bool vmballoon_send_guest_id(struct vmballoon *b)
return false;
}
+static u16 vmballoon_page_size(bool is_2m_page)
+{
+ if (is_2m_page)
+ return 1 << VMW_BALLOON_2M_SHIFT;
+
+ return 1;
+}
+
/*
* Retrieve desired balloon size from the host.
*/
@@ -407,31 +440,37 @@ static int vmballoon_send_lock_page(struct vmballoon *b, unsigned long pfn,
if (pfn32 != pfn)
return -1;
- STATS_INC(b->stats.lock);
+ STATS_INC(b->stats.lock[false]);
*hv_status = status = VMWARE_BALLOON_CMD(LOCK, pfn, dummy, *target);
if (vmballoon_check_status(b, status))
return 0;
pr_debug("%s - ppn %lx, hv returns %ld\n", __func__, pfn, status);
- STATS_INC(b->stats.lock_fail);
+ STATS_INC(b->stats.lock_fail[false]);
return 1;
}
static int vmballoon_send_batched_lock(struct vmballoon *b,
- unsigned int num_pages, unsigned int *target)
+ unsigned int num_pages, bool is_2m_pages, unsigned int *target)
{
unsigned long status;
unsigned long pfn = page_to_pfn(b->page);
- STATS_INC(b->stats.lock);
+ STATS_INC(b->stats.lock[is_2m_pages]);
+
+ if (is_2m_pages)
+ status = VMWARE_BALLOON_CMD(BATCHED_2M_LOCK, pfn, num_pages,
+ *target);
+ else
+ status = VMWARE_BALLOON_CMD(BATCHED_LOCK, pfn, num_pages,
+ *target);
- status = VMWARE_BALLOON_CMD(BATCHED_LOCK, pfn, num_pages, *target);
if (vmballoon_check_status(b, status))
return 0;
pr_debug("%s - batch ppn %lx, hv returns %ld\n", __func__, pfn, status);
- STATS_INC(b->stats.lock_fail);
+ STATS_INC(b->stats.lock_fail[is_2m_pages]);
return 1;
}
@@ -449,34 +488,56 @@ static bool vmballoon_send_unlock_page(struct vmballoon *b, unsigned long pfn,
if (pfn32 != pfn)
return false;
- STATS_INC(b->stats.unlock);
+ STATS_INC(b->stats.unlock[false]);
status = VMWARE_BALLOON_CMD(UNLOCK, pfn, dummy, *target);
if (vmballoon_check_status(b, status))
return true;
pr_debug("%s - ppn %lx, hv returns %ld\n", __func__, pfn, status);
- STATS_INC(b->stats.unlock_fail);
+ STATS_INC(b->stats.unlock_fail[false]);
return false;
}
static bool vmballoon_send_batched_unlock(struct vmballoon *b,
- unsigned int num_pages, unsigned int *target)
+ unsigned int num_pages, bool is_2m_pages, unsigned int *target)
{
unsigned long status;
unsigned long pfn = page_to_pfn(b->page);
- STATS_INC(b->stats.unlock);
+ STATS_INC(b->stats.unlock[is_2m_pages]);
+
+ if (is_2m_pages)
+ status = VMWARE_BALLOON_CMD(BATCHED_2M_UNLOCK, pfn, num_pages,
+ *target);
+ else
+ status = VMWARE_BALLOON_CMD(BATCHED_UNLOCK, pfn, num_pages,
+ *target);
- status = VMWARE_BALLOON_CMD(BATCHED_UNLOCK, pfn, num_pages, *target);
if (vmballoon_check_status(b, status))
return true;
pr_debug("%s - batch ppn %lx, hv returns %ld\n", __func__, pfn, status);
- STATS_INC(b->stats.unlock_fail);
+ STATS_INC(b->stats.unlock_fail[is_2m_pages]);
return false;
}
+static struct page *vmballoon_alloc_page(gfp_t flags, bool is_2m_page)
+{
+ if (is_2m_page)
+ return alloc_pages(flags, VMW_BALLOON_2M_SHIFT);
+
+ return alloc_page(flags);
+}
+
+static void vmballoon_free_page(struct page *page, bool is_2m_page)
+{
+ if (is_2m_page)
+ __free_pages(page, VMW_BALLOON_2M_SHIFT);
+ else
+ __free_page(page);
+}
+
/*
* Quickly release all pages allocated for the balloon. This function is
* called when host decides to "reset" balloon for one reason or another.
@@ -486,13 +547,21 @@ static bool vmballoon_send_batched_unlock(struct vmballoon *b,
static void vmballoon_pop(struct vmballoon *b)
{
struct page *page, *next;
-
- list_for_each_entry_safe(page, next, &b->pages, lru) {
- list_del(&page->lru);
- __free_page(page);
- STATS_INC(b->stats.free);
- b->size--;
- cond_resched();
+ unsigned is_2m_pages;
+
+ for (is_2m_pages = 0; is_2m_pages < VMW_BALLOON_NUM_PAGE_SIZES;
+ is_2m_pages++) {
+ struct vmballoon_page_size *page_size =
+ &b->page_sizes[is_2m_pages];
+ u16 size_per_page = vmballoon_page_size(is_2m_pages);
+
+ list_for_each_entry_safe(page, next, &page_size->pages, lru) {
+ list_del(&page->lru);
+ vmballoon_free_page(page, is_2m_pages);
+ STATS_INC(b->stats.free[is_2m_pages]);
+ b->size -= size_per_page;
+ cond_resched();
+ }
}
if ((b->capabilities & VMW_BALLOON_BATCHED_CMDS) != 0) {
@@ -510,19 +579,22 @@ static void vmballoon_pop(struct vmballoon *b)
* inflation cycle.
*/
static int vmballoon_lock_page(struct vmballoon *b, unsigned int num_pages,
- unsigned int *target)
+ bool is_2m_pages, unsigned int *target)
{
int locked, hv_status;
struct page *page = b->page;
+ struct vmballoon_page_size *page_size = &b->page_sizes[false];
+
+ /* is_2m_pages can never happen as 2m pages support implies batching */
locked = vmballoon_send_lock_page(b, page_to_pfn(page), &hv_status,
target);
if (locked > 0) {
- STATS_INC(b->stats.refused_alloc);
+ STATS_INC(b->stats.refused_alloc[false]);
if (hv_status == VMW_BALLOON_ERROR_RESET ||
hv_status == VMW_BALLOON_ERROR_PPN_NOTNEEDED) {
- __free_page(page);
+ vmballoon_free_page(page, false);
return -EIO;
}
@@ -531,17 +603,17 @@ static int vmballoon_lock_page(struct vmballoon *b, unsigned int num_pages,
* and retry allocation, unless we already accumulated
* too many of them, in which case take a breather.
*/
- if (b->n_refused_pages < VMW_BALLOON_MAX_REFUSED) {
- b->n_refused_pages++;
- list_add(&page->lru, &b->refused_pages);
+ if (page_size->n_refused_pages < VMW_BALLOON_MAX_REFUSED) {
+ page_size->n_refused_pages++;
+ list_add(&page->lru, &page_size->refused_pages);
} else {
- __free_page(page);
+ vmballoon_free_page(page, false);
}
return -EIO;
}
/* track allocated page */
- list_add(&page->lru, &b->pages);
+ list_add(&page->lru, &page_size->pages);
/* update balloon size */
b->size++;
@@ -550,17 +622,19 @@ static int vmballoon_lock_page(struct vmballoon *b, unsigned int num_pages,
}
static int vmballoon_lock_batched_page(struct vmballoon *b,
- unsigned int num_pages, unsigned int *target)
+ unsigned int num_pages, bool is_2m_pages, unsigned int *target)
{
int locked, i;
+ u16 size_per_page = vmballoon_page_size(is_2m_pages);
- locked = vmballoon_send_batched_lock(b, num_pages, target);
+ locked = vmballoon_send_batched_lock(b, num_pages, is_2m_pages,
+ target);
if (locked > 0) {
for (i = 0; i < num_pages; i++) {
u64 pa = vmballoon_batch_get_pa(b->batch_page, i);
struct page *p = pfn_to_page(pa >> PAGE_SHIFT);
- __free_page(p);
+ vmballoon_free_page(p, is_2m_pages);
}
return -EIO;
@@ -569,25 +643,28 @@ static int vmballoon_lock_batched_page(struct vmballoon *b,
for (i = 0; i < num_pages; i++) {
u64 pa = vmballoon_batch_get_pa(b->batch_page, i);
struct page *p = pfn_to_page(pa >> PAGE_SHIFT);
+ struct vmballoon_page_size *page_size =
+ &b->page_sizes[is_2m_pages];
locked = vmballoon_batch_get_status(b->batch_page, i);
switch (locked) {
case VMW_BALLOON_SUCCESS:
- list_add(&p->lru, &b->pages);
- b->size++;
+ list_add(&p->lru, &page_size->pages);
+ b->size += size_per_page;
break;
case VMW_BALLOON_ERROR_PPN_PINNED:
case VMW_BALLOON_ERROR_PPN_INVALID:
- if (b->n_refused_pages < VMW_BALLOON_MAX_REFUSED) {
- list_add(&p->lru, &b->refused_pages);
- b->n_refused_pages++;
+ if (page_size->n_refused_pages
+ < VMW_BALLOON_MAX_REFUSED) {
+ list_add(&p->lru, &page_size->refused_pages);
+ page_size->n_refused_pages++;
break;
}
/* Fallthrough */
case VMW_BALLOON_ERROR_RESET:
case VMW_BALLOON_ERROR_PPN_NOTNEEDED:
- __free_page(p);
+ vmballoon_free_page(p, is_2m_pages);
break;
default:
/* This should never happen */
@@ -604,18 +681,21 @@ static int vmballoon_lock_batched_page(struct vmballoon *b,
* to use, if needed.
*/
static int vmballoon_unlock_page(struct vmballoon *b, unsigned int num_pages,
- unsigned int *target)
+ bool is_2m_pages, unsigned int *target)
{
struct page *page = b->page;
+ struct vmballoon_page_size *page_size = &b->page_sizes[false];
+
+ /* is_2m_pages can never happen as 2m pages support implies batching */
if (!vmballoon_send_unlock_page(b, page_to_pfn(page), target)) {
- list_add(&page->lru, &b->pages);
+ list_add(&page->lru, &page_size->pages);
return -EIO;
}
/* deallocate page */
- __free_page(page);
- STATS_INC(b->stats.free);
+ vmballoon_free_page(page, false);
+ STATS_INC(b->stats.free[false]);
/* update balloon size */
b->size--;
@@ -624,18 +704,23 @@ static int vmballoon_unlock_page(struct vmballoon *b, unsigned int num_pages,
}
static int vmballoon_unlock_batched_page(struct vmballoon *b,
- unsigned int num_pages, unsigned int *target)
+ unsigned int num_pages, bool is_2m_pages,
+ unsigned int *target)
{
int locked, i, ret = 0;
bool hv_success;
+ u16 size_per_page = vmballoon_page_size(is_2m_pages);
- hv_success = vmballoon_send_batched_unlock(b, num_pages, target);
+ hv_success = vmballoon_send_batched_unlock(b, num_pages, is_2m_pages,
+ target);
if (!hv_success)
ret = -EIO;
for (i = 0; i < num_pages; i++) {
u64 pa = vmballoon_batch_get_pa(b->batch_page, i);
struct page *p = pfn_to_page(pa >> PAGE_SHIFT);
+ struct vmballoon_page_size *page_size =
+ &b->page_sizes[is_2m_pages];
locked = vmballoon_batch_get_status(b->batch_page, i);
if (!hv_success || locked != VMW_BALLOON_SUCCESS) {
@@ -644,14 +729,14 @@ static int vmballoon_unlock_batched_page(struct vmballoon *b,
* hypervisor, re-add it to the list of pages owned by
* the balloon driver.
*/
- list_add(&p->lru, &b->pages);
+ list_add(&p->lru, &page_size->pages);
} else {
/* deallocate page */
- __free_page(p);
- STATS_INC(b->stats.free);
+ vmballoon_free_page(p, is_2m_pages);
+ STATS_INC(b->stats.free[is_2m_pages]);
/* update balloon size */
- b->size--;
+ b->size -= size_per_page;
}
}
@@ -662,17 +747,20 @@ static int vmballoon_unlock_batched_page(struct vmballoon *b,
* Release pages that were allocated while attempting to inflate the
* balloon but were refused by the host for one reason or another.
*/
-static void vmballoon_release_refused_pages(struct vmballoon *b)
+static void vmballoon_release_refused_pages(struct vmballoon *b,
+ bool is_2m_pages)
{
struct page *page, *next;
+ struct vmballoon_page_size *page_size =
+ &b->page_sizes[is_2m_pages];
- list_for_each_entry_safe(page, next, &b->refused_pages, lru) {
+ list_for_each_entry_safe(page, next, &page_size->refused_pages, lru) {
list_del(&page->lru);
- __free_page(page);
- STATS_INC(b->stats.refused_free);
+ vmballoon_free_page(page, is_2m_pages);
+ STATS_INC(b->stats.refused_free[is_2m_pages]);
}
- b->n_refused_pages = 0;
+ page_size->n_refused_pages = 0;
}
static void vmballoon_add_page(struct vmballoon *b, int idx, struct page *p)
@@ -699,6 +787,7 @@ static void vmballoon_inflate(struct vmballoon *b)
unsigned int num_pages = 0;
int error = 0;
gfp_t flags = VMW_PAGE_ALLOC_NOSLEEP;
+ bool is_2m_pages;
pr_debug("%s - size: %d, target %d\n", __func__, b->size, b->target);
@@ -721,22 +810,46 @@ static void vmballoon_inflate(struct vmballoon *b)
* Start with no sleep allocation rate which may be higher
* than sleeping allocation rate.
*/
- rate = b->slow_allocation_cycles ? b->rate_alloc : UINT_MAX;
+ if (b->slow_allocation_cycles) {
+ rate = b->rate_alloc;
+ is_2m_pages = false;
+ } else {
+ rate = UINT_MAX;
+ is_2m_pages =
+ b->supported_page_sizes == VMW_BALLOON_NUM_PAGE_SIZES;
+ }
pr_debug("%s - goal: %d, no-sleep rate: %u, sleep rate: %d\n",
__func__, b->target - b->size, rate, b->rate_alloc);
while (!b->reset_required &&
- b->size < b->target && num_pages < b->target - b->size) {
+ b->size + num_pages * vmballoon_page_size(is_2m_pages)
+ < b->target) {
struct page *page;
if (flags == VMW_PAGE_ALLOC_NOSLEEP)
- STATS_INC(b->stats.alloc);
+ STATS_INC(b->stats.alloc[is_2m_pages]);
else
STATS_INC(b->stats.sleep_alloc);
- page = alloc_page(flags);
+ page = vmballoon_alloc_page(flags, is_2m_pages);
if (!page) {
+ STATS_INC(b->stats.alloc_fail[is_2m_pages]);
+
+ if (is_2m_pages) {
+ b->ops->lock(b, num_pages, true, &b->target);
+
+ /*
+ * ignore errors from locking as we now switch
+ * to 4k pages and we might get different
+ * errors.
+ */
+
+ num_pages = 0;
+ is_2m_pages = false;
+ continue;
+ }
+
if (flags == VMW_PAGE_ALLOC_CANSLEEP) {
/*
* CANSLEEP page allocation failed, so guest
@@ -748,7 +861,6 @@ static void vmballoon_inflate(struct vmballoon *b)
STATS_INC(b->stats.sleep_alloc_fail);
break;
}
- STATS_INC(b->stats.alloc_fail);
/*
* NOSLEEP page allocation failed, so the guest is
@@ -771,7 +883,8 @@ static void vmballoon_inflate(struct vmballoon *b)
b->ops->add_page(b, num_pages++, page);
if (num_pages == b->batch_max_pages) {
- error = b->ops->lock(b, num_pages, &b->target);
+ error = b->ops->lock(b, num_pages, is_2m_pages,
+ &b->target);
num_pages = 0;
if (error)
break;
@@ -786,7 +899,7 @@ static void vmballoon_inflate(struct vmballoon *b)
}
if (num_pages > 0)
- b->ops->lock(b, num_pages, &b->target);
+ b->ops->lock(b, num_pages, is_2m_pages, &b->target);
/*
* We reached our goal without failures so try increasing
@@ -800,7 +913,8 @@ static void vmballoon_inflate(struct vmballoon *b)
VMW_BALLOON_RATE_ALLOC_MAX);
}
- vmballoon_release_refused_pages(b);
+ vmballoon_release_refused_pages(b, true);
+ vmballoon_release_refused_pages(b, false);
}
/*
@@ -808,34 +922,45 @@ static void vmballoon_inflate(struct vmballoon *b)
*/
static void vmballoon_deflate(struct vmballoon *b)
{
- struct page *page, *next;
- unsigned int i = 0;
- unsigned int num_pages = 0;
- int error;
+ unsigned is_2m_pages;
pr_debug("%s - size: %d, target %d\n", __func__, b->size, b->target);
/* free pages to reach target */
- list_for_each_entry_safe(page, next, &b->pages, lru) {
- list_del(&page->lru);
- b->ops->add_page(b, num_pages++, page);
+ for (is_2m_pages = 0; is_2m_pages < b->supported_page_sizes;
+ is_2m_pages++) {
+ struct page *page, *next;
+ unsigned int num_pages = 0;
+ struct vmballoon_page_size *page_size =
+ &b->page_sizes[is_2m_pages];
+
+ list_for_each_entry_safe(page, next, &page_size->pages, lru) {
+ if (b->reset_required ||
+ (b->target > 0 &&
+ b->size - num_pages
+ * vmballoon_page_size(is_2m_pages)
+ < b->target + vmballoon_page_size(true)))
+ break;
+ list_del(&page->lru);
+ b->ops->add_page(b, num_pages++, page);
- if (num_pages == b->batch_max_pages) {
- error = b->ops->unlock(b, num_pages, &b->target);
- num_pages = 0;
- if (error)
- return;
- }
+ if (num_pages == b->batch_max_pages) {
+ int error;
- if (b->reset_required || ++i >= b->size - b->target)
- break;
+ error = b->ops->unlock(b, num_pages,
+ is_2m_pages, &b->target);
+ num_pages = 0;
+ if (error)
+ return;
+ }
- cond_resched();
- }
+ cond_resched();
+ }
- if (num_pages > 0)
- b->ops->unlock(b, num_pages, &b->target);
+ if (num_pages > 0)
+ b->ops->unlock(b, num_pages, is_2m_pages, &b->target);
+ }
}
static const struct vmballoon_ops vmballoon_basic_ops = {
@@ -925,7 +1050,8 @@ static void vmballoon_work(struct work_struct *work)
if (b->size < target)
vmballoon_inflate(b);
- else if (b->size > target)
+ else if (target == 0 ||
+ b->size > target + vmballoon_page_size(true))
vmballoon_deflate(b);
}
@@ -969,24 +1095,35 @@ static int vmballoon_debug_show(struct seq_file *f, void *offset)
"timer: %8u\n"
"start: %8u (%4u failed)\n"
"guestType: %8u (%4u failed)\n"
+ "2m-lock: %8u (%4u failed)\n"
"lock: %8u (%4u failed)\n"
+ "2m-unlock: %8u (%4u failed)\n"
"unlock: %8u (%4u failed)\n"
"target: %8u (%4u failed)\n"
+ "prim2mAlloc: %8u (%4u failed)\n"
"primNoSleepAlloc: %8u (%4u failed)\n"
"primCanSleepAlloc: %8u (%4u failed)\n"
+ "prim2mFree: %8u\n"
"primFree: %8u\n"
+ "err2mAlloc: %8u\n"
"errAlloc: %8u\n"
+ "err2mFree: %8u\n"
"errFree: %8u\n",
stats->timer,
stats->start, stats->start_fail,
stats->guest_type, stats->guest_type_fail,
- stats->lock, stats->lock_fail,
- stats->unlock, stats->unlock_fail,
+ stats->lock[true], stats->lock_fail[true],
+ stats->lock[false], stats->lock_fail[false],
+ stats->unlock[true], stats->unlock_fail[true],
+ stats->unlock[false], stats->unlock_fail[false],
stats->target, stats->target_fail,
- stats->alloc, stats->alloc_fail,
+ stats->alloc[true], stats->alloc_fail[true],
+ stats->alloc[false], stats->alloc_fail[false],
stats->sleep_alloc, stats->sleep_alloc_fail,
- stats->free,
- stats->refused_alloc, stats->refused_free);
+ stats->free[true],
+ stats->free[false],
+ stats->refused_alloc[true], stats->refused_alloc[false],
+ stats->refused_free[true], stats->refused_free[false]);
return 0;
}
@@ -1040,7 +1177,7 @@ static inline void vmballoon_debugfs_exit(struct vmballoon *b)
static int __init vmballoon_init(void)
{
int error;
-
+ unsigned is_2m_pages;
/*
* Check if we are running on VMware's hypervisor and bail out
* if we are not.
@@ -1048,8 +1185,11 @@ static int __init vmballoon_init(void)
if (x86_hyper != &x86_hyper_vmware)
return -ENODEV;
- INIT_LIST_HEAD(&balloon.pages);
- INIT_LIST_HEAD(&balloon.refused_pages);
+ for (is_2m_pages = 0; is_2m_pages < VMW_BALLOON_NUM_PAGE_SIZES;
+ is_2m_pages++) {
+ INIT_LIST_HEAD(&balloon.page_sizes[is_2m_pages].pages);
+ INIT_LIST_HEAD(&balloon.page_sizes[is_2m_pages].refused_pages);
+ }
/* initialize rates */
balloon.rate_alloc = VMW_BALLOON_RATE_ALLOC_MAX;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-23 13:03:11 +0300