Drivers: hv: hv_balloon: Make adjustments in computing the floor
Make adjustments in computing the balloon floor. The current computation
of the balloon floor was not appropriate for virtual machines with more than
10 GB of assigned memory - we would get into situations where the host would
agressively balloon down the guest and leave the guest in an unusable state.
This patch fixes the issue by raising the floor.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index b958ded..9cbbb83 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -928,9 +928,8 @@
* 128 72 (1/2)
* 512 168 (1/4)
* 2048 360 (1/8)
- * 8192 552 (1/32)
- * 32768 1320
- * 131072 4392
+ * 8192 768 (1/16)
+ * 32768 1536 (1/32)
*/
if (totalram_pages < MB2PAGES(128))
min_pages = MB2PAGES(8) + (totalram_pages >> 1);
@@ -938,8 +937,10 @@
min_pages = MB2PAGES(40) + (totalram_pages >> 2);
else if (totalram_pages < MB2PAGES(2048))
min_pages = MB2PAGES(104) + (totalram_pages >> 3);
+ else if (totalram_pages < MB2PAGES(8192))
+ min_pages = MB2PAGES(256) + (totalram_pages >> 4);
else
- min_pages = MB2PAGES(296) + (totalram_pages >> 5);
+ min_pages = MB2PAGES(512) + (totalram_pages >> 5);
#undef MB2PAGES
return min_pages;
}