| From: |
| Stanislav Kinsburskii <skinsburskii-AT-linux.microsoft.com> |
| To: |
| kys-AT-microsoft.com, haiyangz-AT-microsoft.com, wei.liu-AT-kernel.org, decui-AT-microsoft.com, longli-AT-microsoft.com |
| Subject: |
| [PATCH 0/4] Improve Hyper-V memory deposit error handling |
| Date: |
| Fri, 23 Jan 2026 01:35:08 +0000 |
| Message-ID: |
| <176913164914.89165.5792608454600292463.stgit@skinsburskii-cloud-desktop.internal.cloudapp.net> |
| Cc: |
| linux-hyperv-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org |
| Archive-link: |
| Article |
This series extends the MSHV driver to properly handle additional
memory-related error codes from the Microsofot Hypervisor by depositing
memory pages when needed.
Currently, when the hypervisor returns HV_STATUS_INSUFFICIENT_MEMORY
during partition creation, the driver calls hv_call_deposit_pages() to
provide the necessary memory. However, there are other memory-related
error codes that indicate the hypervisor needs additional memory
resources, but the driver does not attempt to deposit pages for these
cases.
This series introduces the hv_result_oom() helper function macro to
identify all memory-related error codes (HV_STATUS_INSUFFICIENT_MEMORY,
HV_STATUS_INSUFFICIENT_BUFFERS, HV_STATUS_INSUFFICIENT_DEVICE_DOMAINS, and
HV_STATUS_INSUFFICIENT_ROOT_MEMORY) and ensures the driver attempts to
deposit pages for all of them via new hv_deposit_memory() helper.
With these changes, partition creation becomes more robust by handling
all scenarios where the hypervisor requires additional memory deposits.
---
Stanislav Kinsburskii (4):
mshv: Introduce hv_result_oom() helper function
mshv: Introduce hv_deposit_memory helper functions
mshv: Handle insufficient contiguous memory hypervisor status
mshv: Handle insufficient root memory hypervisor status
drivers/hv/hv_common.c | 3 ++
drivers/hv/hv_proc.c | 54 +++++++++++++++++++++++++++++++++++---
drivers/hv/mshv_root_hv_call.c | 45 +++++++++++++-------------------
drivers/hv/mshv_root_main.c | 5 +---
include/asm-generic/mshyperv.h | 13 +++++++++
include/hyperv/hvgdk_mini.h | 57 +++++++++++++++++++++-------------------
include/hyperv/hvhdk_mini.h | 2 +
7 files changed, 119 insertions(+), 60 deletions(-)
