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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 <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2015-12-14 16:01:32 -08:00 committed by Greg Kroah-Hartman
parent 9220e39b5c
commit c0b200cfb0
3 changed files with 9 additions and 2 deletions
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3
drivers/hv/hv_fcopy.c
View File

@ -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;

3
drivers/hv/hv_kvp.c
View File

@ -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;

5
drivers/hv/hyperv_vmbus.h
View File

@ -30,6 +30,11 @@
#include <linux/atomic.h>
#include <linux/hyperv.h>
/*
* 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).