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| author | Dexuan Cui <decui@microsoft.com> | 2015-02-27 11:25:59 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-01 19:30:07 -0800 |
| commit | 89f9f6796d41e10e224b0cb0027ddd78cb881f65 (patch) | |
| tree | db64755f71d4c714a1ca83d5bba30bdcd1c97279 /arch/x86 | |
| parent | 1896566372579939eb86414ea3d664f18d5e909c (diff) | |
| download | talos-op-linux-89f9f6796d41e10e224b0cb0027ddd78cb881f65.tar.gz talos-op-linux-89f9f6796d41e10e224b0cb0027ddd78cb881f65.zip | |
hv: vmbus_post_msg: retry the hypercall on some transient errors
I got HV_STATUS_INVALID_CONNECTION_ID on Hyper-V 2008 R2 when keeping running
"rmmod hv_netvsc; modprobe hv_netvsc; rmmod hv_utils; modprobe hv_utils"
in a Linux guest. Looks the host has some kind of throttling mechanism if
some kinds of hypercalls are sent too frequently.
Without the patch, the driver can occasionally fail to load.
Also let's retry HV_STATUS_INSUFFICIENT_MEMORY, though we didn't get it
before.
Removed 'case -ENOMEM', since the hypervisor doesn't return this.
CC: "K. Y. Srinivasan" <kys@microsoft.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/uapi/asm/hyperv.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h index 90c458e66e13..ce6068dbcfbc 100644 --- a/arch/x86/include/uapi/asm/hyperv.h +++ b/arch/x86/include/uapi/asm/hyperv.h @@ -225,6 +225,8 @@ #define HV_STATUS_INVALID_HYPERCALL_CODE 2 #define HV_STATUS_INVALID_HYPERCALL_INPUT 3 #define HV_STATUS_INVALID_ALIGNMENT 4 +#define HV_STATUS_INSUFFICIENT_MEMORY 11 +#define HV_STATUS_INVALID_CONNECTION_ID 18 #define HV_STATUS_INSUFFICIENT_BUFFERS 19 typedef struct _HV_REFERENCE_TSC_PAGE { |
