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Drivers: hv: util: Increase the timeout for util services

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[ Upstream commit c0b200cfb0403740171c7527b3ac71d03f82947a ]

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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.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 12e2d36594
commit e31409cd1a
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).