From c0b200cfb0403740171c7527b3ac71d03f82947a Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Mon, 14 Dec 2015 16:01:32 -0800 Subject: [PATCH] Drivers: hv: util: Increase the timeout for util services Util services such as KVP and FCOPY need assistance from daemon's running in user space. Increase the timeout so we don't prematurely terminate the transaction in the kernel. Host sets up a 60 second timeout for all util driver transactions. The host will retry the transaction if it times out. Set the guest timeout at 30 seconds. Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_fcopy.c | 3 ++- drivers/hv/hv_kvp.c | 3 ++- drivers/hv/hyperv_vmbus.h | 5 +++++ 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/hv/hv_fcopy.c b/drivers/hv/hv_fcopy.c index db4b887b889d..bbdec50c4a1c 100644 --- a/drivers/hv/hv_fcopy.c +++ b/drivers/hv/hv_fcopy.c @@ -275,7 +275,8 @@ void hv_fcopy_onchannelcallback(void *context) * Send the information to the user-level daemon. */ schedule_work(&fcopy_send_work); - schedule_delayed_work(&fcopy_timeout_work, 5*HZ); + schedule_delayed_work(&fcopy_timeout_work, + HV_UTIL_TIMEOUT * HZ); return; } icmsghdr->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c index 74c38a9f34a6..e6aa33a89b0e 100644 --- a/drivers/hv/hv_kvp.c +++ b/drivers/hv/hv_kvp.c @@ -668,7 +668,8 @@ void hv_kvp_onchannelcallback(void *context) * user-mode not responding. */ schedule_work(&kvp_sendkey_work); - schedule_delayed_work(&kvp_timeout_work, 5*HZ); + schedule_delayed_work(&kvp_timeout_work, + HV_UTIL_TIMEOUT * HZ); return; diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 3782636562a1..225b96bcf7fe 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -30,6 +30,11 @@ #include #include +/* + * Timeout for services such as KVP and fcopy. + */ +#define HV_UTIL_TIMEOUT 30 + /* * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent * is set by CPUID(HVCPUID_VERSION_FEATURES).