m/memory/auto_online_blocks'
3) Wait till hv_balloon driver finishes negotiation.
4) Increase memory to 8192Mb.
5) Increase memory to 1Mb.
The first patch in the series fixes the issue. While writing it I stumbled
upon an unrelated issue which I fix with PATCH 2.
Please review.
Vitaly
We set host_specified_ha_region = true on certain request but this is a
global state which stays 'true' forever. We need to reset it when we
receive a request where ha_region is not specified. I did not see any
real issues, the bug was found by code inspection.
Signed-off-by: Vitaly
2016-April/088262.html
It consists of 7 patches. It would probably make sense to take them all
I think.
>
> Vitaly Kuznetsov (1):
> Drivers: hv: kvp: fix IP Failover
>
> drivers/hv/hv_kvp.c | 31 +
> drivers/hv/hyperv_vmbus.h
t
separation between kernel and userspace parts.
Other two modules (VSS and FCOPY) don't require such delay, leave them
untouched.
Signed-off-by: Vitaly Kuznetsov
---
Changes since v1:
- Cancel handshake timeout work on module unload.
---
drivers/hv/hv_kvp.c | 31 ++
"K. Y. Srinivasan" writes:
> From: Vitaly Kuznetsov
>
> Hyper-V VMs can be replicated to another hosts and there is a feature to
> set different IP for replicas, it is called 'Failover TCP/IP'. When
> such guest starts Hyper-V host sends it KVP_OP_SET_IP_
Dexuan Cui writes:
> Hi Vitaly,
> We got the below warning once -- it's pretty hard to repro it.
>
> I think the cause may be: before the daemon is terminated, we can successfully
> "rmmod hv_utils" -- as a result all the code/data segments of the module
> shouldn't be accessed any more, but in
PU as we're clearing CPU0 messages now but we may want to bring
up additional CPUs on crash) as new messages won't be delivered till we
consume what's pending. On boot we'll place message pages somewhere else
and we won't be able to read stale messages.
KY Srinivasan writes:
>> -Original Message-
>> From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com]
>> Sent: Monday, March 21, 2016 12:52 AM
>> To: KY Srinivasan
>> Cc: de...@linuxdriverproject.org; linux-ker...@vger.kernel.org; Haiyang
>> Zhang ; Ale
KY Srinivasan writes:
>> -Original Message-
>> From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com]
>> Sent: Monday, March 21, 2016 1:19 AM
>> To: KY Srinivasan
>> Cc: gre...@linuxfoundation.org; linux-ker...@vger.kernel.org;
>> de...@linux
KY Srinivasan writes:
>> -Original Message-
>> From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com]
>> Sent: Monday, March 21, 2016 12:52 AM
>> To: KY Srinivasan
>> Cc: de...@linuxdriverproject.org; linux-ker...@vger.kernel.org; Haiyang
>> Zhang ; Ale
"K. Y. Srinivasan" writes:
> Implement copy-free read APIs.
>
> Signed-off-by: K. Y. Srinivasan
> ---
> drivers/hv/ring_buffer.c | 55
> ++
> include/linux/hyperv.h |6 +
> 2 files changed, 61 insertions(+), 0 deletions(-)
>
> diff --git
"K. Y. Srinivasan" writes:
> We need to issue a full memory barrier prior making a signalling
> decision.
Any reason this should be mb()? This is pretty strong and will probably
lead to performace regression ... and, btw, we have another mb() in
hv_ringbuffer_read().
Could you please describe t
KY Srinivasan writes:
>> -Original Message-
>> From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com]
>> Sent: Friday, March 18, 2016 5:33 AM
>> To: de...@linuxdriverproject.org
>> Cc: linux-ker...@vger.kernel.org; KY Srinivasan ;
>> Haiyang Zhang ; Ale
Radim Krcmar writes:
> 2016-03-18 13:33+0100, Vitaly Kuznetsov:
>> Kdump keeps biting. Turns out CHANNELMSG_UNLOAD_RESPONSE is always
>> delivered to CPU0 regardless of what CPU we're sending CHANNELMSG_UNLOAD
>> from. vmbus_wait_for_unload() doesn't account for
current CPU as we're clearing CPU0 messages now but we may want to bring
up additional CPUs on crash) as new messages won't be delivered till we
consume what's pending. On boot we'll place message pages somewhere else
and we won't be able to read stale messages.
Sig
l required,
fix the check.
Fixes: 3209f9d780d1 ("scsi: storvsc: Fix a bug in the handling of SRB status
flags")
Signed-off-by: Vitaly Kuznetsov
---
drivers/scsi/storvsc_drv.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi
t
separation between kernel and userspace parts.
Other two modules (VSS and FCOPY) don't require such delay, leave them
untouched.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_kvp.c | 30 ++
drivers/hv/hyperv_vmbus.h | 5 +
2 files changed, 35 in
KY Srinivasan writes:
>> -Original Message-
>> From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com]
>> Sent: Thursday, February 18, 2016 5:35 AM
>> To: de...@linuxdriverproject.org
>> Cc: KY Srinivasan ; Haiyang Zhang
>> ; Olaf Hering ; Cathy Avery
nctions.
Fixes: 3cace4a61610 ("Drivers: hv: utils: run polling callback always in
interrupt context")
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_fcopy.c| 1 +
drivers/hv/hv_kvp.c | 1 +
drivers/hv/hv_snapshot.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/drivers/h
David Miller writes:
> From: Haiyang Zhang
> Date: Tue, 9 Feb 2016 15:31:34 +
>
>> 1) I share your concern as well. Is there a universal way to immediately
>> trigger
>> DHCP renew of all current and future daemons with a single event from
>> kernel?
>> If not, can we put the delay (RNDI
wait_for_completion() may sleep, it enables interrupts and this
is something we really want to avoid on crashes because interrupt
handlers can cause other crashes. Switch to the recently introduced
vmbus_wait_for_unload() doing busy wait instead.
Reported-by: Radim Krcmar
Signed-off-by: Vitaly
We have 3 functions dealing with messages and they all implement
the same logic to finalize reads, move it to vmbus_signal_eom().
Suggested-by: Radim Krcmar
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/channel_mgmt.c | 10 +-
drivers/hv/hyperv_vmbus.h | 24
First patch of the series addresses a potentially important issue,
second patch tries to make crash path more stable, the rest is just
a cleanup.
Please review.
Vitaly Kuznetsov (4):
Drivers: hv: vmbus: don't loose HVMSG_TIMER_EXPIRED messages
Drivers: hv: vmbus: avoid wait_for_compl
Message header is modified by the hypervisor and we read it in a loop,
we need to prevent compilers from optimizing accesses. There are no such
optimizations at this moment, this is just a future proof.
Suggested-by: Radim Krcmar
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/channel_mgmt.c
handle it from there. Avoid looping in vmbus_on_msg_dpc(), we're OK
with handling one message per interrupt.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/vmbus_drv.c | 68 --
1 file changed, 33 insertions(+), 35 deletions(-)
diff --git a/dr
Vitaly Kuznetsov writes:
> Commit c0eb454034aa ("hv_netvsc: Don't ask for additional head room in the
> skb") got rid of needed_headroom setting for the driver. With the change I
> hit the following issue trying to use ptkgen module:
>
> [ 57.522021] kernel
ry, it should not give us performance penalty.
Signed-off-by: Vitaly Kuznetsov
---
drivers/net/hyperv/netvsc_drv.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 1d3a665..98e34fe 100644
--- a/drivers/net/hyperv/netvsc_drv.c
Haiyang Zhang writes:
>> -Original Message-
>> From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com]
>> Sent: Wednesday, February 3, 2016 8:06 AM
>> To: Haiyang Zhang
>> Cc: da...@davemloft.net; net...@vger.kernel.org; KY Srinivasan
>> ; o...@aep
Haiyang Zhang writes:
> We simulates a link down period for RNDIS_STATUS_NETWORK_CHANGE message to
> trigger DHCP renew. User daemons may need multiple seconds to trigger the
> link down event. (e.g. ifplugd: 5sec, network-manager: 4sec.) So update
> this link down period to 10 sec to properly tr
the struct
flow_keys data layout and this is wrong.
Get rid of netvsc_set_hash() by switching to skb_get_hash(). This change
will also imply switching to Jenkins hash from the currently used Toeplitz
but it seems there is no good excuse for Toeplitz to stay.
Signed-off-by: Vitaly Kuznetsov
--
clocksource_change_rating() involves mutex usage and can't be called
in interrupt context. It also makes sense to avoid doing redundant work
on crash.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv.c | 10 --
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drive
cpus in Linux, e.g. when we boot with 'nr_cpus=' limitation.
Avoid the infinite loop in init_vp_index() by checking that we still have
non-used CPUs in the alloced_cpus_in_node mask and resetting it in case
we don't.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/channel_mgm
all the other messages and use it if we're in an
interrupt context.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/channel_mgmt.c | 44 +++-
1 file changed, 43 insertions(+), 1 deletion(-)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_m
Kdump on crash is reportedly broken for Hyper-V guests and I was able to
find two reasons:
1) Inability to boot with nr_cpus=1 (PATCH 1)
2) Sleeping in interrupt context on crash (PATCH 2 and 3)
Vitaly Kuznetsov (3):
Drivers: hv: vmbus: avoid infinite loop in init_vp_index()
Drivers: hv
Dexuan Cui writes:
> For now only 1 event is defined: HVSOCK_RESCIND_CHANNEL.
> We'll have more events in the future.
>
> Signed-off-by: Dexuan Cui
> ---
> drivers/hv/channel_mgmt.c | 18 ++
> include/linux/hyperv.h| 17 +
> 2 files changed, 35 insertions(+)
Dexuan Cui writes:
> This will be used by the coming net/hvsock driver.
>
> Signed-off-by: Dexuan Cui
> ---
> drivers/hv/channel.c | 59
> ++
> include/linux/hyperv.h | 9
> 2 files changed, 68 insertions(+)
>
> diff --git a/drivers/h
eason I didn't
do it. I believe you have more or less the same reasoing for introducing
new read type instead of parsing this at a higher level. Some comments
below ...
>
> This patch is required by the next patch, which will introduce the hvsock
> send/recv APIs.
>
Dexuan Cui writes:
Just some minor nitpicks below -- I have to admit I didn't test the feature.
[..skip..]
> +
> + if (sk->sk_err) {
> + ret = -sk->sk_err;
> + goto out_wait_error;
> + } else {
> + ret = 0;
> + }
> +
> +out_wait:
> + finish_w
project.org; o...@aepfle.de; a...@canonical.com;
>> vkuzn...@redhat.com; jasow...@redhat.com
>> Subject: [PATCH 1/3] Drivers: hv: utils: fix hvt_op_poll() return value on
>> transport
>> destroy
>>
>> From: Vitaly Kuznetsov
>>
>> The return type of hvt_op_pol
The return type of hvt_op_poll() is unsigned int and -EBADF is
inappropriate, poll functions return POLL* statuses.
Reported-by: Dexuan Cui
Signed-off-by: Vitaly Kuznetsov
---
- This is a follow-up to the previously sent 'Drivers: hv: utils: introduce
HVUTIL_TRANSPORT_DESTROY mode&#
> de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
>> vkuzn...@redhat.com; jasow...@redhat.com
>> Subject: [PATCH 3/9] Drivers: hv: utils: introduce HVUTIL_TRANSPORT_DESTROY
>> mode
>>
>> From: Vitaly Kuznetsov
>>
>> When Hyper-V host
only
way to solve the issue is to defer freeing the hvutil_transport structure.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_utils_transport.c | 26 +++---
1 file changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/hv/hv_utils_transport.c b/drivers/hv
separate contexts now we need to use
a proper locking.
Signed-off-by: Vitaly Kuznetsov
---
Changes since v1:
- Don't re-introduce memory leak in hvt_op_write() [Dan Carpenter]
---
drivers/hv/hv_utils_transport.c | 71 -
drivers/hv/hv_utils_transport.h |
ted, patch 2 renames outmsg_lock to
'lock' as we're gonna use it to protect test-and-set operations on 'mode',
patch 3 introduces HVUTIL_TRANSPORT_DESTROY mode of operation, patch 4
fixes the issue itself.
Patches are rebased on previously sent Olaf's fixes.
Vitaly Kuzne
As a preparation to reusing outmsg_lock to protect test-and-set openrations
on 'mode' rename it the more general 'lock'.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_utils_transport.c | 14 +++---
drivers/hv/hv_utils_transport.h | 2 +-
2 files changed
inmsg should be freed in case of on_msg() failure to avoid memory leak.
Preserve the error code from on_msg().
Signed-off-by: Vitaly Kuznetsov
---
Changes since v1:
- Preserve the error code from on_msg(). [Dan Carpenter]
---
drivers/hv/hv_utils_transport.c | 7 ---
1 file changed, 4
Vitaly Kuznetsov writes:
> Haiyang Zhang writes:
>
>> In commit 2a04ae8acb14 ("hv_netvsc: remove locking in netvsc_send()"), the
>> locking for MSD (Multi-Send Data) field was removed. This could cause a
>> race condition between RNDIS control messages and d
() directly. Please see
my patch attached (note: it should be split in 3 patches if
submitted). If you like the idea I can send it.
--
Vitaly
commit b2784f827d2b7b19d3af6025bbe8be5b1450b88c
Author: Vitaly Kuznetsov
Date: Fri Dec 11 13:29:40 2015 +0100
netvsc: untangle rndis_filter_send_reques
above
mentioned lock, calculate available space on the ring, ...) twice and
this path is performance-critical.
Remove hv_ringbuffer_peek() moving the logic from __vmbus_recvpacket() to
hv_ringbuffer_read().
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/channel.c | 30
smp_read_barrier_depends() does nothing on almost all arcitectures
including x86 and having it in the beginning of
hv_get_ringbuffer_availbytes() does not provide any guarantees anyway.
Signed-off-by: Vitaly Kuznetsov
---
include/linux/hyperv.h | 2 --
1 file changed, 2 deletions(-)
diff --git
hv_ringbuffer_peek() does the same as hv_ringbuffer_read() without
advancing the read index. The only functional change this patch brings
is moving hv_need_to_signal_on_read() call under the ring_lock but this
function is just a couple of comparisons.
Signed-off-by: Vitaly Kuznetsov
---
drivers
case in
vmbus_recvpacket(). I'm removing it as it is usless for users to see
such messages and /vmbus_recvpacket_raw() doesn't have it.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/channel.c | 65 ++--
1 file changed, 22 insertions(+), 43 deletion
Convert 6+-string comments repeating function names to normal kernel-style
comments and fix a couple of other comment style issues. No textual or
functional changes intended.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/ring_buffer.c | 135 +--
1
Changes since v1: added PATCH 4/5 and 5/5.
1) Fix comment style in ring_buffer.c
2) Remove unneeded smp_read_barrier_depends() from hyperv.h
3) Unify hv_ringbuffer_peek/read() functions
4) Unify vmbus_recvpacket()/vmbus_recvpacket_raw() functions
5) Eliminate hv_ringbuffer_peek().
Vitaly
Long Li writes:
> Introduce a logging level for storvsc to log certain error/warning
> messages. Those messages are helpful in some environments,
> e.g. Microsoft Azure, for customer support and troubleshooting
> purposes.
I have an alternative suggestion: let's use dynamic debug! Basically, we
ork device context.
- On a reconfig event add it to the list of events and schedule
netvsc_link_change().
- In netvsc_link_change() ensure 2-second delay between link status
changes.
- Handle RNDIS_STATUS_NETWORK_CHANGE as a paired disconnect/connect event.
Signed-off-by: Vitaly Kuznetsov
--
"K. Y. Srinivasan" writes:
> The rndis header is 116 bytes big and can be placed in the default
> head room that will be available in the skb.
We have the following in include/linux/netdevice.h:
#if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
# if defined(CONFIG_MAC80211_MESH)
# define LL_
"K. Y. Srinivasan" writes:
> As part of reducing the size of the hv_netvsc_packet, resize some of the
> variables based on their usage.
>
> Signed-off-by: K. Y. Srinivasan
> Reviewed-by: Haiyang Zhang
> ---
> drivers/net/hyperv/hyperv_net.h | 14 +++---
> 1 files changed, 7 insertion
hv_ringbuffer_peek() does the same as hv_ringbuffer_read() without
advancing the read index. The only functional change this patch brings
is moving hv_need_to_signal_on_read() call under the ring_lock but this
function is just a couple of comparisons.
Signed-off-by: Vitaly Kuznetsov
---
drivers
smp_read_barrier_depends() does nothing on almost all arcitectures
including x86 and having it in the beginning of
hv_get_ringbuffer_availbytes() does not provide any guarantees anyway.
Signed-off-by: Vitaly Kuznetsov
---
include/linux/hyperv.h | 2 --
1 file changed, 2 deletions(-)
diff --git
1) Fix comment style in ring_buffer.c
2) Remove unneeded smp_read_barrier_depends() from hyperv.h
3) Unify hv_ringbuffer_peek/read() functions.
Vitaly Kuznetsov (3):
Drivers: hv: ring_buffer.c: fix comment style
Drivers: hv: ring_buffer: remove stray smp_read_barrier_depends()
Drivers: hv
Convert 6+-string comments repeating function names to normal kernel-style
comments and fix a couple of other comment style issues. No textual or
functional changes intended.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/ring_buffer.c | 135 +--
1
"K. Y. Srinivasan" writes:
> Currently we have two policies for deciding when to signal the host:
> One based on the ring buffer state and the other based on what the
> VMBUS client driver wants to do. Consider the case when the client
> wants to explicitly control when to signal the host. In thi
x27;re gonna use it to protect test-and-set operations on 'mode',
patch 3 introduces HVUTIL_TRANSPORT_DESTROY mode of operation, patch 4
fixes the issue itself.
Patches are rebased on previously sent Olaf's fixes.
Vitaly Kuznetsov (4):
Drivers: hv: utils: fix memory leak on on_msg(
separate contexts now we need to use
a proper locking.
Signed-off-by: Vitaly Kuznetsov
---
Changes since v1:
- Don't re-introduce memory leak in hvt_op_write() [Dan Carpenter]
---
drivers/hv/hv_utils_transport.c | 71 -
drivers/hv/hv_utils_transport.h |
As a preparation to reusing outmsg_lock to protect test-and-set openrations
on 'mode' rename it the more general 'lock'.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_utils_transport.c | 14 +++---
drivers/hv/hv_utils_transport.h | 2 +-
2 files changed
only
way to solve the issue is to defer freeing the hvutil_transport structure.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_utils_transport.c | 26 +++---
1 file changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/hv/hv_utils_transport.c b/drivers/hv
inmsg should be freed in case of on_msg() failure to avoid memory leak.
Preserve the error code from on_msg().
Signed-off-by: Vitaly Kuznetsov
---
Changes since v1:
- Preserve the error code from on_msg(). [Dan Carpenter]
---
drivers/hv/hv_utils_transport.c | 7 ---
1 file changed, 4
Dan Carpenter writes:
> On Thu, Nov 12, 2015 at 12:32:13PM +0100, Vitaly Kuznetsov wrote:
>> @@ -85,10 +86,10 @@ static ssize_t hvt_op_write(struct file *file, const
>> char __user *buf,
>> return PTR_ERR(inmsg);
>>
>> if (hvt->on_msg(i
separate contexts now we need to use
a proper locking.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_utils_transport.c | 69 -
drivers/hv/hv_utils_transport.h | 1 +
2 files changed, 56 insertions(+), 14 deletions(-)
diff --git a/drivers/hv/hv_utils_trans
inmsg should be freed in case of on_msg() failure to avoid memory leak.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_utils_transport.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/hv/hv_utils_transport.c b/drivers/hv/hv_utils_transport.c
index 24b2766
only
way to solve the issue is to defer freeing the hvutil_transport structure.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_utils_transport.c | 26 +++---
1 file changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/hv/hv_utils_transport.c b/drivers/hv
he issue itself.
Patches are rebased on previously sent Olaf's fixes.
Vitaly Kuznetsov (4):
Drivers: hv: utils: fix memory leak on on_msg() failure
Drivers: hv: utils: rename outmsg_lock
Drivers: hv: utils: introduce HVUTIL_TRANSPORT_DESTROY mode
Drivers: hv: utils: fix crash when
As a preparation to reusing outmsg_lock to protect test-and-set openrations
on 'mode' rename it the more general 'lock'.
Signed-off-by: Vitaly Kuznetsov
---
drivers/hv/hv_utils_transport.c | 14 +++---
drivers/hv/hv_utils_transport.h | 2 +-
2 files changed
"K. Y. Srinivasan" writes:
> From: Dexuan Cui
>
> spinlock is unnecessary here.
> mutex is enough.
Hm, mutex is usually required when we need to sleep and a spinlock is
enough otherwise :-)
Or are you trying to say we don't need to disable interrupts here? In
that can maybe we can just switch
Haiyang Zhang writes:
>> -Original Message-
>> From: Richard Weinberger [mailto:richard.weinber...@gmail.com]
>> Sent: Tuesday, October 27, 2015 6:36 PM
>> To: David Miller
>> Cc: Haiyang Zhang ; o...@aepfle.de; Greg Kroah-
>> Hartman ; net...@vger.kernel.org; jasow...@redhat.com;
>> dri
Olaf Hering writes:
> The Backup integration service on WS2012 has appearently trouble to
> negotiate with a guest which does not support the provided util version.
> Currently the VSS driver supports only version 5/0. A WS2012 offers only
> version 1/x and 3/x, and vmbus_prep_negotiate_resp corr
Olaf Hering writes:
> On Thu, Oct 08, KY Srinivasan wrote:
>
>> > yes, but after doing fcopy_respond_to_host(). I'd suggest we leave the
>> > check in place, better safe than sorry.
>>
>> Agreed; Olaf, if it is ok with you, I can fix it up and send.
>
> I will retest with this part reverted. I t
Olaf Hering writes:
> On Thu, Oct 08, Vitaly Kuznetsov wrote:
>
>> > @@ -295,9 +288,6 @@ static int fcopy_on_msg(void *msg, int len)
>> >if (fcopy_transaction.state == HVUTIL_DEVICE_INIT)
>> >return fcopy_handle_handshake(*val);
>>
"K. Y. Srinivasan" writes:
> From: Olaf Hering
>
> All channel interrupts are bound to specific VCPUs in the guest
> at the point channel is created. While currently, we invoke the
> polling function on the correct CPU (the CPU to which the channel
> is bound to) in some cases we may run the pol
"K. Y. Srinivasan" writes:
> From: Jake Oshins
>
> This defines the channel type for PCI front-ends in Hyper-V VMs.
>
> Signed-off-by: Jake Oshins
> Signed-off-by: K. Y. Srinivasan
> ---
> drivers/hv/channel_mgmt.c |3 +++
> include/linux/hyperv.h| 11 +++
> 2 files changed,
tch does appropriate cleanup in case of vmbus_connect() failure.
>
> Signed-off-by: Andrey Smetanin
> Signed-off-by: Denis V. Lunev
> CC: "K. Y. Srinivasan"
> CC: Haiyang Zhang
> CC: Vitaly Kuznetsov
Reviewed-by: Vitaly Kuznetsov
> ---
> drivers/hv/vmbus_drv.c | 4
_INTERFACE.
>
> Change ms_hyperv_platform to actually do what the specification suggests.
> This roughy matches what Windows looks for, though Windows actually
> ignores HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS completely.
>
> Signed-off-by: Paolo Bonzini
Reviewed-by: Vitaly Kuznetsov
"K. Y. Srinivasan" writes:
[...]
>
> Vitaly Kuznetsov (2):
> scsi_scan: don't dump trace when scsi_prep_async_scan() is called
> twice
> scsi: introduce short_inquiry flag for broken host adapters
James,
I'm sorry for the annoyance but when I aske
Ben Hutchings writes:
> On Tue, 2015-09-29 at 10:47 +0200, Vitaly Kuznetsov wrote:
>> Ben Hutchings writes:
>>
>> > Currently with this configuration I get:
>> >
>> > arch/x86/built-in.o: In function `hv_machine_crash_shutdown':
>>
kml.org/lkml/2015/9/7/440
...
>
> Fixes: b4370df2b1f5 ("Drivers: hv: vmbus: add special crash handler")
> Signed-off-by: Ben Hutchings
> Cc: Vitaly Kuznetsov
> ---
> arch/x86/kernel/cpu/mshyperv.c | 6 +-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
>
) functions.
Setting virt_boundary_mask to PAGE_SIZE - 1 guarantees we'll never see
such holes so we can significantly simplify the driver. This is also
supposed to bring us some performance improvement for certain workloads
as we eliminate copying.
Reported-by: Radim Krčmář
Signed-off-by: Vita
Christoph Hellwig writes:
> On Tue, Sep 22, 2015 at 06:27:50PM +0200, Vitaly Kuznetsov wrote:
>> Storvsc driver needs to ensure there are no 'holes' in the presented
>> sg list (all segments in the middle of the list need to be of PAGE_SIZE).
>
> I think it sho
down'
Decorate all kexec related code with #ifdef CONFIG_KEXEC_CORE.
Reported-by: Jim Davis
Reported-by: Stephen Hemminger
Signed-off-by: Vitaly Kuznetsov
---
Changes since v2:
- Hide hv_kexec_handler/hv_crash_handler under IS_ENABLED(CONFIG_HYPERV)
to avoid warings in !CONFIG_HYPERV &
e_buffer()
functions. Scsi layer already has scsi_sg_copy_{to,from}_buffer()
functions to linearize a list, the only difference is that already
existent functions create a flat buffer instead of a new list but we can
cope.
Reported-by: Radim Krčmář
Signed-off-by: Vitaly Kuznetsov
---
drivers/scsi
down'
Decorate all kexec related code with #ifdef CONFIG_KEXEC_CORE.
Reported-by: Jim Davis
Reported-by: Stephen Hemminger
Signed-off-by: Vitaly Kuznetsov
---
Previously I tried solving the issue by defining native_machine_crash_shutdown
in !CONFIG_KEXEC_CORE case: https://lkml.org/lkml
Olaf Hering writes:
> On Mon, Sep 21, Vitaly Kuznetsov wrote:
>
>> I'd like to see a trace from the hang, it is not obvious to me how it
>> happened and what caused it. (or if you have such hang scenario in your
>> head, can you please reveal it?)
&
Olaf Hering writes:
> On Sun, Sep 20, Greg KH wrote:
>
>> Just use a lock, that's what it is there for.
>
> How would that help? It might help because it enforces ordering. But
> that requires that all three utils get refactored to deal with the
> introduced locking. I will let KY comment on this
d TSC
page.
Signed-off-by: Vitaly Kuznetsov
---
arch/x86/kernel/cpu/mshyperv.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index aad4bd8..6fd023d 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
KY Srinivasan writes:
>> -Original Message-
>> From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com]
>> Sent: Thursday, June 25, 2015 9:12 AM
>> To: linux-s...@vger.kernel.org
>> Cc: Long Li; KY Srinivasan; Haiyang Zhang; James E.J. Bottomley;
>> de.
Long Li writes:
>> -Original Message-
>> From: KY Srinivasan
>> Sent: Friday, July 03, 2015 11:35 AM
>> To: Vitaly Kuznetsov; linux-s...@vger.kernel.org
>> Cc: Long Li; Haiyang Zhang; James E.J. Bottomley;
>> de...@linuxdriverproject.org;
>> l
KY Srinivasan writes:
>> -Original Message-
>> From: Greg KH [mailto:gre...@linuxfoundation.org]
>> Sent: Thursday, August 6, 2015 2:11 PM
>> To: KY Srinivasan
>> Cc: linux-ker...@vger.kernel.org; de...@linuxdriverproject.org;
>> vkuzn...@redhat.com; s...@canb.auug.org.au; t...@linutroni
Commit e513229b4c38 ("Drivers: hv: vmbus: prevent cpu offlining on newer
hypervisors") was altering smp_ops.cpu_disable to prevent CPU offlining.
We can bo better by using cpu_hotplug_enable/disable functions instead of
such hard-coding.
Reported-by: Radim Krčmář
Signed-off-by: Vitaly
Hyper-V module needs to disable cpu hotplug (offlining) as there is no
support from hypervisor side to reassign already opened event channels
to a different CPU. Currently it is been done by altering
smp_ops.cpu_disable but it is hackish.
Signed-off-by: Vitaly Kuznetsov
Reviewed-by: Thomas
er
in disable_nonboot_cpus() unconditionally as all users of
disable_nonboot_cpus() are supposed to do enable_nonboot_cpus() in case
an error was returned.
Signed-off-by: Vitaly Kuznetsov
Reviewed-by: Thomas Gleixner
---
Changes since v6:
- make this patch first in the series [Thomas Gleixner],
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