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Drivers: hv: balloon: Use available memory value in pressure report 

Reports for available memory should use the si_mem_available() value.
The previous freeram value does not include available page cache memory.

Signed-off-by: Alex Ng <alexng@messages.microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Ng 2016-08-24 16:23:13 -07:00 committed by Greg Kroah-Hartman
parent eece30b9f0
commit b605c2d913
1 changed files with 5 additions and 8 deletions
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13
drivers/hv/hv_balloon.c
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@ -1075,7 +1075,6 @@ static unsigned long compute_balloon_floor(void)
static void post_status(struct hv_dynmem_device *dm)
{
struct dm_status status;
struct sysinfo val;
unsigned long now = jiffies;
unsigned long last_post = last_post_time;
@ -1087,7 +1086,6 @@ static void post_status(struct hv_dynmem_device *dm)
if (!time_after(now, (last_post_time + HZ)))
return;
si_meminfo(&val);
memset(&status, 0, sizeof(struct dm_status));
status.hdr.type = DM_STATUS_REPORT;
status.hdr.size = sizeof(struct dm_status);
@ -1103,7 +1101,7 @@ static void post_status(struct hv_dynmem_device *dm)
* num_pages_onlined) as committed to the host, otherwise it can try
* asking us to balloon them out.
*/
status.num_avail = val.freeram;
status.num_avail = si_mem_available();
status.num_committed = vm_memory_committed() +
dm->num_pages_ballooned +
(dm->num_pages_added > dm->num_pages_onlined ?
@ -1209,7 +1207,7 @@ static void balloon_up(struct work_struct *dummy)
int ret;
bool done = false;
int i;
struct sysinfo val;
long avail_pages;
unsigned long floor;
/* The host balloons pages in 2M granularity. */
@ -1221,12 +1219,12 @@ static void balloon_up(struct work_struct *dummy)
*/
alloc_unit = 512;
si_meminfo(&val);
avail_pages = si_mem_available();
floor = compute_balloon_floor();
/* Refuse to balloon below the floor, keep the 2M granularity. */
if (val.freeram < num_pages || val.freeram - num_pages < floor) {
num_pages = val.freeram > floor ? (val.freeram - floor) : 0;
if (avail_pages < num_pages || avail_pages - num_pages < floor) {
num_pages = avail_pages > floor ? (avail_pages - floor) : 0;
num_pages -= num_pages % PAGES_IN_2M;
}
@ -1237,7 +1235,6 @@ static void balloon_up(struct work_struct *dummy)
bl_resp->hdr.size = sizeof(struct dm_balloon_response);
bl_resp->more_pages = 1;
num_pages -= num_ballooned;
num_ballooned = alloc_balloon_pages(&dm_device, num_pages,
bl_resp, alloc_unit);