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Groups > linux.kernel > #1241900 > unrolled thread

[PATCH 00/10] Drivers: hv: Miscellaneous fixes.

Started by"K. Y. Srinivasan" <kys@microsoft.com>
First post2015-10-08 02:40 +0200
Last post2015-10-08 16:50 +0200
Articles 8 — 4 participants

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  [PATCH 00/10] Drivers: hv: Miscellaneous fixes.   "K. Y. Srinivasan" <kys@microsoft.com> - 2015-10-08 02:40 +0200
    [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed "K. Y. Srinivasan" <kys@microsoft.com> - 2015-10-08 02:40 +0200
      Re: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect  failed "Denis V. Lunev" <den@openvz.org> - 2015-10-08 19:30 +0200
        RE: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect  failed KY Srinivasan <kys@microsoft.com> - 2015-10-08 19:30 +0200
          Re: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect  failed "Denis V. Lunev" <den@openvz.org> - 2015-10-08 19:40 +0200
    [PATCH 01/10] Drivers: hv: util: Increase the timeout for util services "K. Y. Srinivasan" <kys@microsoft.com> - 2015-10-08 02:40 +0200
      Re: [PATCH 01/10] Drivers: hv: util: Increase the timeout for util  services Olaf Hering <olaf@aepfle.de> - 2015-10-08 15:30 +0200
        RE: [PATCH 01/10] Drivers: hv: util: Increase the timeout for util  services KY Srinivasan <kys@microsoft.com> - 2015-10-08 16:50 +0200

#1241900 — [PATCH 00/10] Drivers: hv: Miscellaneous fixes.

From"K. Y. Srinivasan" <kys@microsoft.com>
Date2015-10-08 02:40 +0200
Subject[PATCH 00/10] Drivers: hv: Miscellaneous fixes.
Message-ID<qh7pv-4eQ-7@gated-at.bofh.it>
Miscellaneous fixes.

Denis V. Lunev (1):
  drivers/hv: cleanup synic msrs if vmbus connect failed

Jake Oshins (3):
  drivers:hv: Export a function that maps Linux CPU num onto Hyper-V
    proc num
  drivers:hv: Export the API to invoke a hypercall on Hyper-V
  drivers:hv: Define the channel type for Hyper-V PCI Express
    pass-through

K. Y. Srinivasan (1):
  Drivers: hv: util: Increase the timeout for util services

Olaf Hering (5):
  Drivers: hv: utils: run polling callback always in interrupt context
  tools: hv: report ENOSPC errors in hv_fcopy_daemon
  tools: hv: remove repeated HV_FCOPY string
  Drivers: hv: util: catch allocation errors
  Drivers: hv: utils: use memdup_user in hvt_op_write

 drivers/hv/channel_mgmt.c       |    3 ++
 drivers/hv/hv.c                 |   20 +++++++++---------
 drivers/hv/hv_fcopy.c           |   40 ++++++++++++++------------------------
 drivers/hv/hv_kvp.c             |   31 +++++++++++------------------
 drivers/hv/hv_snapshot.c        |   29 ++++++++++-----------------
 drivers/hv/hv_utils_transport.c |   18 +++++++++-------
 drivers/hv/hyperv_vmbus.h       |   13 ++++++-----
 drivers/hv/vmbus_drv.c          |   21 +++++++++++++++++++-
 include/linux/hyperv.h          |   14 +++++++++++++
 include/uapi/linux/hyperv.h     |    1 +
 tools/hv/hv_fcopy_daemon.c      |   24 ++++++++++++++++++----
 11 files changed, 122 insertions(+), 92 deletions(-)

-- 
1.7.4.1

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#1241901 — [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed

From"K. Y. Srinivasan" <kys@microsoft.com>
Date2015-10-08 02:40 +0200
Subject[PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed
Message-ID<qh7pw-4eQ-33@gated-at.bofh.it>
In reply to#1241900
From: Denis V. Lunev <den@openvz.org>

Before vmbus_connect() synic is setup per vcpu - this means
hypervisor receives writes at synic msr's and probably allocate
hypervisor resources per synic setup.

If vmbus_connect() failed for some reason it's neccessary to cleanup
synic setup by call hv_synic_cleanup() at each vcpu to get a chance
to free allocated resources by hypervisor per synic.

This patch does appropriate cleanup in case of vmbus_connect() failure.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
---
 drivers/hv/vmbus_drv.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index f19b6f7..3297731 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -867,7 +867,7 @@ static int vmbus_bus_init(int irq)
 	on_each_cpu(hv_synic_init, NULL, 1);
 	ret = vmbus_connect();
 	if (ret)
-		goto err_alloc;
+		goto err_connect;
 
 	if (vmbus_proto_version > VERSION_WIN7)
 		cpu_hotplug_disable();
@@ -885,6 +885,8 @@ static int vmbus_bus_init(int irq)
 
 	return 0;
 
+err_connect:
+	on_each_cpu(hv_synic_cleanup, NULL, 1);
 err_alloc:
 	hv_synic_free();
 	hv_remove_vmbus_irq();
-- 
1.7.4.1

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#1242623 — Re: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed

From"Denis V. Lunev" <den@openvz.org>
Date2015-10-08 19:30 +0200
SubjectRe: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed
Message-ID<qhnaV-1HD-1@gated-at.bofh.it>
In reply to#1241901
On 10/08/2015 05:01 AM, K. Y. Srinivasan wrote:
> From: Denis V. Lunev <den@openvz.org>

K.Y.,

there is one subtle thing in this submission. You have changed "From:"
field in comparison with the original letter. I have submitted
the patch with "From: Andrey Smetanin <asmetanin@virtuozzo.com>"
In this case Author: in the resulted git mainstream commit will
be Andrey. With your submission the resulted Author will be I.

This was already happened once with

commit cc2dd4027a43bb36c846f195a764edabc0828602
Author: Denis V. Lunev <den@openvz.org>
Date:   Sat Aug 1 16:08:20 2015 -0700

     mshyperv: fix recognition of Hyper-V guest crash MSR's

The situation looks a bit unfair.

Can we do something with that now/next time?

Den

> Before vmbus_connect() synic is setup per vcpu - this means
> hypervisor receives writes at synic msr's and probably allocate
> hypervisor resources per synic setup.
>
> If vmbus_connect() failed for some reason it's neccessary to cleanup
> synic setup by call hv_synic_cleanup() at each vcpu to get a chance
> to free allocated resources by hypervisor per synic.
>
> This patch does appropriate cleanup in case of vmbus_connect() failure.
>
> Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
> Signed-off-by: Denis V. Lunev <den@openvz.org>
> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> CC: "K. Y. Srinivasan" <kys@microsoft.com>
> CC: Haiyang Zhang <haiyangz@microsoft.com>
> CC: Vitaly Kuznetsov <vkuznets@redhat.com>
> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
> ---
>   drivers/hv/vmbus_drv.c |    4 +++-
>   1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
> index f19b6f7..3297731 100644
> --- a/drivers/hv/vmbus_drv.c
> +++ b/drivers/hv/vmbus_drv.c
> @@ -867,7 +867,7 @@ static int vmbus_bus_init(int irq)
>   	on_each_cpu(hv_synic_init, NULL, 1);
>   	ret = vmbus_connect();
>   	if (ret)
> -		goto err_alloc;
> +		goto err_connect;
>   
>   	if (vmbus_proto_version > VERSION_WIN7)
>   		cpu_hotplug_disable();
> @@ -885,6 +885,8 @@ static int vmbus_bus_init(int irq)
>   
>   	return 0;
>   
> +err_connect:
> +	on_each_cpu(hv_synic_cleanup, NULL, 1);
>   err_alloc:
>   	hv_synic_free();
>   	hv_remove_vmbus_irq();

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#1242626 — RE: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed

FromKY Srinivasan <kys@microsoft.com>
Date2015-10-08 19:30 +0200
SubjectRE: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed
Message-ID<qhnaW-1HD-17@gated-at.bofh.it>
In reply to#1242623

> -----Original Message-----
> From: Denis V. Lunev [mailto:den@openvz.org]
> Sent: Thursday, October 8, 2015 10:20 AM
> To: KY Srinivasan <kys@microsoft.com>; gregkh@linuxfoundation.org; linux-
> kernel@vger.kernel.org; devel@linuxdriverproject.org; olaf@aepfle.de;
> apw@canonical.com; vkuznets@redhat.com; jasowang@redhat.com
> Cc: Andrey Smetanin <asmetanin@virtuozzo.com>; Haiyang Zhang
> <haiyangz@microsoft.com>
> Subject: Re: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect
> failed
> 
> On 10/08/2015 05:01 AM, K. Y. Srinivasan wrote:
> > From: Denis V. Lunev <den@openvz.org>
> 
> K.Y.,
> 
> there is one subtle thing in this submission. You have changed "From:"
> field in comparison with the original letter. I have submitted
> the patch with "From: Andrey Smetanin <asmetanin@virtuozzo.com>"
> In this case Author: in the resulted git mainstream commit will
> be Andrey. With your submission the resulted Author will be I.
> 
> This was already happened once with
> 
> commit cc2dd4027a43bb36c846f195a764edabc0828602
> Author: Denis V. Lunev <den@openvz.org>
> Date:   Sat Aug 1 16:08:20 2015 -0700
> 
>      mshyperv: fix recognition of Hyper-V guest crash MSR's
> 
> The situation looks a bit unfair.
> 
> Can we do something with that now/next time?

I am going to be resubmitting this series. I will fix it up.

Regards,

K. Y
> 
> Den
> 
> > Before vmbus_connect() synic is setup per vcpu - this means
> > hypervisor receives writes at synic msr's and probably allocate
> > hypervisor resources per synic setup.
> >
> > If vmbus_connect() failed for some reason it's neccessary to cleanup
> > synic setup by call hv_synic_cleanup() at each vcpu to get a chance
> > to free allocated resources by hypervisor per synic.
> >
> > This patch does appropriate cleanup in case of vmbus_connect() failure.
> >
> > Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
> > Signed-off-by: Denis V. Lunev <den@openvz.org>
> > Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> > CC: "K. Y. Srinivasan" <kys@microsoft.com>
> > CC: Haiyang Zhang <haiyangz@microsoft.com>
> > CC: Vitaly Kuznetsov <vkuznets@redhat.com>
> > Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
> > ---
> >   drivers/hv/vmbus_drv.c |    4 +++-
> >   1 files changed, 3 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
> > index f19b6f7..3297731 100644
> > --- a/drivers/hv/vmbus_drv.c
> > +++ b/drivers/hv/vmbus_drv.c
> > @@ -867,7 +867,7 @@ static int vmbus_bus_init(int irq)
> >   	on_each_cpu(hv_synic_init, NULL, 1);
> >   	ret = vmbus_connect();
> >   	if (ret)
> > -		goto err_alloc;
> > +		goto err_connect;
> >
> >   	if (vmbus_proto_version > VERSION_WIN7)
> >   		cpu_hotplug_disable();
> > @@ -885,6 +885,8 @@ static int vmbus_bus_init(int irq)
> >
> >   	return 0;
> >
> > +err_connect:
> > +	on_each_cpu(hv_synic_cleanup, NULL, 1);
> >   err_alloc:
> >   	hv_synic_free();
> >   	hv_remove_vmbus_irq();

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#1242633 — Re: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed

From"Denis V. Lunev" <den@openvz.org>
Date2015-10-08 19:40 +0200
SubjectRe: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect failed
Message-ID<qhnkC-1SL-5@gated-at.bofh.it>
In reply to#1242626
On 10/08/2015 08:28 PM, KY Srinivasan wrote:
>
>> -----Original Message-----
>> From: Denis V. Lunev [mailto:den@openvz.org]
>> Sent: Thursday, October 8, 2015 10:20 AM
>> To: KY Srinivasan <kys@microsoft.com>; gregkh@linuxfoundation.org; linux-
>> kernel@vger.kernel.org; devel@linuxdriverproject.org; olaf@aepfle.de;
>> apw@canonical.com; vkuznets@redhat.com; jasowang@redhat.com
>> Cc: Andrey Smetanin <asmetanin@virtuozzo.com>; Haiyang Zhang
>> <haiyangz@microsoft.com>
>> Subject: Re: [PATCH 07/10] drivers/hv: cleanup synic msrs if vmbus connect
>> failed
>>
>> On 10/08/2015 05:01 AM, K. Y. Srinivasan wrote:
>>> From: Denis V. Lunev <den@openvz.org>
>> K.Y.,
>>
>> there is one subtle thing in this submission. You have changed "From:"
>> field in comparison with the original letter. I have submitted
>> the patch with "From: Andrey Smetanin <asmetanin@virtuozzo.com>"
>> In this case Author: in the resulted git mainstream commit will
>> be Andrey. With your submission the resulted Author will be I.
>>
>> This was already happened once with
>>
>> commit cc2dd4027a43bb36c846f195a764edabc0828602
>> Author: Denis V. Lunev <den@openvz.org>
>> Date:   Sat Aug 1 16:08:20 2015 -0700
>>
>>       mshyperv: fix recognition of Hyper-V guest crash MSR's
>>
>> The situation looks a bit unfair.
>>
>> Can we do something with that now/next time?
> I am going to be resubmitting this series. I will fix it up.
thank you very much :)

Den
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#1241902 — [PATCH 01/10] Drivers: hv: util: Increase the timeout for util services

From"K. Y. Srinivasan" <kys@microsoft.com>
Date2015-10-08 02:40 +0200
Subject[PATCH 01/10] Drivers: hv: util: Increase the timeout for util services
Message-ID<qh7pv-4eQ-9@gated-at.bofh.it>
In reply to#1241900
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.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
---
 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 db4b887..bbdec50 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 74c38a9..e6aa33a 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 3d70e36..f26599b 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -31,6 +31,11 @@
 #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).
  */
-- 
1.7.4.1

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#1242338 — Re: [PATCH 01/10] Drivers: hv: util: Increase the timeout for util services

FromOlaf Hering <olaf@aepfle.de>
Date2015-10-08 15:30 +0200
SubjectRe: [PATCH 01/10] Drivers: hv: util: Increase the timeout for util services
Message-ID<qhjqG-4LW-13@gated-at.bofh.it>
In reply to#1241902
On Wed, Oct 07, K. Y. Srinivasan wrote:

> 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.

Is this an arbitrary number, or does the host allow such a large delay
for the response?

Olaf
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#1242440 — RE: [PATCH 01/10] Drivers: hv: util: Increase the timeout for util services

FromKY Srinivasan <kys@microsoft.com>
Date2015-10-08 16:50 +0200
SubjectRE: [PATCH 01/10] Drivers: hv: util: Increase the timeout for util services
Message-ID<qhkG5-6u9-1@gated-at.bofh.it>
In reply to#1242338
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