RE: [PATCH V4] x86/Hyper-V: Balloon up according to request page number

From: Tianyu Lan Tianyu.Lan@microsoft.com Sent: Monday, January 20, 2020 7:49 PM

Current code has assumption that balloon request memory size aligns with 2MB. But actually Hyper-V doesn't guarantee such alignment. When balloon driver receives non-aligned balloon request, it produces warning and balloon up more memory than requested in order to keep 2MB alignment. Remove the warning and balloon up memory according to actual requested memory size.

Fixes: f6712238471a ("hv: hv_balloon: avoid memory leak on alloc_error of 2MB memory block") Cc: stable@vger.kernel.org Reviewed-by: Vitaly Kuznetsov vkuznets@redhat.com Signed-off-by: Tianyu Lan Tianyu.Lan@microsoft.com

Reviewed-by: Michael Kelley mikelley@microsoft.com