Drivers: hv: hv_balloon: Make adjustments in computing the floor (79208c57) · Commits · 戴 / test

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>

drivers/hv/hv_balloon.c

+5 −4

Original line number	Diff line number	Diff line
		@@ -928,9 +928,8 @@ static unsigned long compute_balloon_floor(void)
		* 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 @@ static unsigned long compute_balloon_floor(void)
		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;
		}

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