[PATCH RESEND net-next] netvsc: Use the new in-place consumption APIs in the rx path

From: K. Y. Srinivasan Use the new APIs for eliminating a copy on the receive path. These new APIs also help in minimizing the number of memory barriers we end up issuing (in the ringbuffer code) since we can better control when we want to expose the ring state to the host.

[PATCH 4/4] Drivers: hv: ring_buffer: count on wrap around mappings in get_next_pkt_raw()

From: Vitaly Kuznetsov With wrap around mappings in place we can always provide drivers with direct links to packets on the ring buffer, even when they wrap around. Do the required updates to get_next_pkt_raw()/put_pkt_raw() Signed-off-by: Vitaly Kuznetsov

[PATCH 3/4] Drivers: hv: ring_buffer: use wrap around mappings in hv_copy{from, to}_ringbuffer()

From: Vitaly Kuznetsov With wrap around mappings for ring buffers we can always use a single memcpy() to do the job. Signed-off-by: Vitaly Kuznetsov Signed-off-by: K. Y. Srinivasan Tested-by: Dexuan Cui ---

[PATCH 0/4] Drivers: hv: vmbus: Make in-place consumption always possible

From: K. Y. Srinivasan Make in-place consumption of VMBus packets always possible. Currently we forbid it when a packet 'wraps around' the ring so we can't provide a single pointer to it. The idea if this series is dead simple: let's make a single virtual mapping for two

[PATCH 1/1] Tools: hv: kvp: ensure kvp device fd is closed on exec

From: Vitaly Kuznetsov KVP daemon does fork()/exec() (with popen()) so we need to close our fds to avoid sharing them with child processes. The immediate implication of not doing so I see is SELinux complaining about 'ip' trying to access '/dev/vmbus/hv_kvp'. Signed-off-by:

[PATCH 1/1] Drivers: hv: Introduce a policy for controlling channel affinity

From: K. Y. Srinivasan Introduce a mechanism to control how channels will be affinitized. We will support two policies: 1. HV_BALANCED: All performance critical channels will be dstributed evenly amongst all the available NUMA nodes. Once the Node is assigned, we

[PATCH 1/4] Drivers: hv: cleanup vmbus_open() for wrap around mappings

From: Vitaly Kuznetsov In preparation for doing wrap around mappings for ring buffers cleanup vmbus_open() function: - check that ring sizes are PAGE_SIZE aligned (they are for all in-kernel drivers now); - kfree(open_info) on error only after we kzalloc() it (not an issue

[PATCH 2/4] Drivers: hv: ring_buffer: wrap around mappings for ring buffers

From: Vitaly Kuznetsov Make it possible to always use a single memcpy() or to provide a direct link to a packet on the ring buffer by creating virtual mapping for two copies of the ring buffer with vmap(). Utilize currently empty hv_ringbuffer_cleanup() to do the unmap.

[PATCH 2/3] Drivers: hv: vmbus: Reduce the delay between retries in vmbus_post_msg()

From: K. Y. Srinivasan The current delay between retries is unnecessarily high and is negatively affecting the time it takes to boot the system. Signed-off-by: K. Y. Srinivasan --- drivers/hv/connection.c |8 1 files changed, 4

[PATCH 0/3] Drivers: hv: vmbus: Miscellaneous adjustments

From: K. Y. Srinivasan Some miscellaneous adjustments to the vmbus driver. K. Y. Srinivasan (3): Drivers: hv: vmbus: Enable explicit signaling policy for NIC channels Drivers: hv: vmbus: Reduce the delay between retries in vmbus_post_msg() Drivers: hv: vmbus:

[PATCH 1/3] Drivers: hv: vmbus: Enable explicit signaling policy for NIC channels

From: K. Y. Srinivasan For synthetic NIC channels, enable explicit signaling policy as netvsc wants to explicitly control when the host is to be signaled. Signed-off-by: K. Y. Srinivasan --- drivers/hv/channel.c | 18 --

[PATCH 3/3] Drivers: hv: vmbus: Implement a mechanism to tag the channel for low latency

From: K. Y. Srinivasan On Hyper-V, performance critical channels use the monitor mechanism to signal the host when the guest posts mesages for the host. This mechanism minimizes the hypervisor intercepts and also makes the host more efficient in that each time the host is

[PATCH 1/1] Drivers: hv: util: don't forget to init host_ts.lock

From: Dexuan Cui Without the patch, I always get a "BUG: spinlock bad magic" warning. Fixes: 3716a49a81ba ("hv_utils: implement Hyper-V PTP source") Signed-off-by: Dexuan Cui Cc: Vitaly Kuznetsov Cc: "K. Y. Srinivasan"

[PATCH 10/10] vmbus: expose debug info for drivers

From: Stephen Hemminger Allow driver to get debug information about state of the ring. Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan --- drivers/hv/hyperv_vmbus.h | 11 ---

[PATCH 02/10] vmbus: use rcu for per-cpu channel list

From: Stephen Hemminger The per-cpu channel list is now referred to in the interrupt routine. This is mostly safe since the host will not normally generate an interrupt when channel is being deleted but if it did then there would be a use after free problem. To

[PATCH 01/10] vmbus: only reschedule tasklet if time limit exceeded

From: Stephen Hemminger The change to reschedule tasklet if more data arrives in ring buffer can cause performance regression if host timing is such that the next response happens in small window. Go back to a modified version of the original looping behavior. If the

[PATCH 07/10] hyperv: remove unnecessary return variable

From: Stephen Hemminger hv_ringbuffer_read cleanup. Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan --- drivers/hv/ring_buffer.c |6 ++ 1 files changed, 2 insertions(+), 4 deletions(-) diff

[PATCH 03/10] hyperv: fix warning about missing prototype

From: Stephen Hemminger Compiling with warnings enabled finds missing prototype for hv_do_hypercall. Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan --- arch/x86/hyperv/hv_init.c |2 +- 1 files

[PATCH 09/10] vmbus: cleanup header file style

From: Stephen Hemminger Minor changes to align hyper-v vmbus include files with current linux kernel style. Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan --- drivers/hv/hyperv_vmbus.h | 16

[PATCH 05/10] vmbus: remove unnecessary initialization

From: Stephen Hemminger Don't initialize variables that are then set a few lines later. Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan --- drivers/hv/ring_buffer.c | 13 + 1 files changed,

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

From: K. Y. Srinivasan Miscellaneous fixes. Stephen Hemminger (10): vmbus: only reschedule tasklet if time limit exceeded vmbus: use rcu for per-cpu channel list hyperv: fix warning about missing prototype vmbus: remove useless return's vmbus: remove unnecessary

[PATCH 06/10] vmbus: fix spelling errors

From: Stephen Hemminger Several spelling errors in comments Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan --- drivers/hv/channel.c | 10 +- drivers/hv/hv_kvp.c | 10 +- 2 files

[PATCH 08/10] vmbus: make channel_message table constant

From: Stephen Hemminger This table is immutable and should be const. Cleanup indentation and whitespace for this as well. Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan --- drivers/hv/channel_mgmt.c |

[PATCH 04/10] vmbus: remove useless return's

From: Stephen Hemminger No need for empty return at end of void function Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_balloon.c |2 -- drivers/hv/hv_fcopy.c|2 --

[PATCH 1/1] Drivers: hv: util: on deinit, don't wait the release event, if we shouldn't

From: Dexuan Cui If the daemon is NOT running at all, when we disable the util device from Hyper-V Manager (or sometimes the host can rescind a util device and then re-offer it), we'll hang in util_remove -> hv_kvp_deinit -> wait_for_completion(_event), because this code

[PATCH 0/5] Drivers: hv: balloon: Miscellaneous fixes.

From: K. Y. Srinivasan Miscellaneous fixes to the balloon driver. Alex Ng (1): Drivers: hv: balloon: Use available memory value in pressure report Vitaly Kuznetsov (4): Drivers: hv: balloon: keep track of where ha_region starts Drivers: hv: balloon: account for gaps

[PATCH 2/5] Drivers: hv: balloon: account for gaps in hot add regions

From: Vitaly Kuznetsov I'm observing the following hot add requests from the WS2012 host: hot_add_req: start_pfn = 0x108200 count = 330752 hot_add_req: start_pfn = 0x158e00 count = 193536 hot_add_req: start_pfn = 0x188400 count = 239616 As the host doesn't specify hot add

[PATCH 3/5] Drivers: hv: balloon: don't wait for ol_waitevent when memhp_auto_online is enabled

From: Vitaly Kuznetsov With the recently introduced in-kernel memory onlining (MEMORY_HOTPLUG_DEFAULT_ONLINE) these is no point in waiting for pages to come online in the driver and we can get rid of the waiting. Signed-off-by: Vitaly Kuznetsov

[PATCH 4/5] Drivers: hv: balloon: replace ha_region_mutex with spinlock

From: Vitaly Kuznetsov lockdep reports possible circular locking dependency when udev is used for memory onlining: systemd-udevd/3996 is trying to acquire lock: ((memory_chain).rwsem){.+}, at: [] __blocking_notifier_call_chain+0x4e/0xc0 but task is already holding

[PATCH 5/5] Drivers: hv: balloon: Use available memory value in pressure report

From: Alex Ng Reports for available memory should use the si_mem_available() value. The previous freeram value does not include available page cache memory. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan

[PATCH] Drivers: hv: vmbus: Revert commit bb08d431a914

From: K. Y. Srinivasan To deal with the merge conflict between net-next and char-misc trees, revert commit bb08d431a914 from char-misc tree. This commit can be rebased and applied once net-next picks up char-misc changes. --- include/linux/hyperv.h | 32

[PATCH V2 1/1] Revert "Drivers: hv: ring_buffer: count on wrap around mappings in get_next_pkt_raw()"

From: K. Y. Srinivasan To deal with the merge conflict between net-next and char-misc trees, revert commit bb08d431a914 from char-misc tree. This commit can be rebased and applied once net-next picks up char-misc changes. Here is the commit log of the reverted patch: "With

[PATCH 2/2] Drivers: hv: vmbus: suppress some "hv_vmbus: Unknown GUID" warnings

From: Dexuan Cui Some VMBus devices are not needed by Linux guest[1][2], and, VMBus channels of Hyper-V Sockets don't really mean usual synthetic devices, so let's suppress the warnings for them. [1] https://support.microsoft.com/en-us/kb/2925727 [2]

[PATCH 0/2] Drivers: hv: vmbus: Some miscellaneous fixes

From: K. Y. Srinivasan Some miscellaneous fixes. Dexuan Cui (1): Drivers: hv: vmbus: suppress some "hv_vmbus: Unknown GUID" warnings Stephen Hemminger (1): Driver: hv: vmbus: Make mmio resource local drivers/hv/channel_mgmt.c | 26 --

[PATCH 1/2] Driver: hv: vmbus: Make mmio resource local

From: Stephen Hemminger This fixes a sparse warning because hyperv_mmio resources are only used in this one file and should be static. Signed-off-by: Stephen Hemminger Signed-off-by: K. Y. Srinivasan ---

[PATCH 3/3] Drivers: hv: utils: Support TimeSync version 4.0 protocol samples.

From: Alex Ng This enables support for more accurate TimeSync v4 samples when hosted under Windows Server 2016 and newer hosts. The new time samples include a "vmreferencetime" field that represents the guest's TSC value when the host generated its time sample.

[PATCH 0/3] Drivers: hv: util: Support the latest time synch protocol from the host

From: K. Y. Srinivasan WS2016 has introduced a new protocol for conditioning guest clock. Support this new protocol. Alex Ng (3): Drivers: hv: utils: Rename version definitions to reflect protocol version. Drivers: hv: utils: Use TimeSync samples to adjust the clock

[PATCH 1/3] Drivers: hv: utils: Rename version definitions to reflect protocol version.

From: Alex Ng Different Windows host versions may reuse the same protocol version when negotiating the TimeSync, Shutdown, and Heartbeat protocols. We should only refer to the protocol version to avoid conflating the two concepts. Signed-off-by: Alex Ng

[PATCH 2/3] Drivers: hv: utils: Use TimeSync samples to adjust the clock after boot.

From: Alex Ng Only the first 50 samples after boot were being used to discipline the clock. After the first 50 samples, any samples from the host were ignored and the guest clock would eventually drift from the host clock. This patch allows TimeSync-enabled guests

[PATCH 5/7] Drivers: hv: Introduce a policy for controlling channel affinity

From: K. Y. Srinivasan Introduce a mechanism to control how channels will be affinitized. We will support two policies: 1. HV_BALANCED: All performance critical channels will be dstributed evenly amongst all the available NUMA nodes. Once the Node is assigned, we

[PATCH 1/7] Drivers: hv: cleanup vmbus_open() for wrap around mappings

From: Vitaly Kuznetsov In preparation for doing wrap around mappings for ring buffers cleanup vmbus_open() function: - check that ring sizes are PAGE_SIZE aligned (they are for all in-kernel drivers now); - kfree(open_info) on error only after we kzalloc() it (not an issue

[PATCH 6/7] Drivers: hv: utils: Continue to poll VSS channel after handling requests.

From: Alex Ng Multiple VSS_OP_HOT_BACKUP requests may arrive in quick succession, even though the host only signals once. The driver wass handling the first request while ignoring the others in the ring buffer. We should poll the VSS channel after handling a request to

[PATCH 7/7] Drivers: hv: utils: Check VSS daemon is listening before a hot backup

From: Alex Ng Hyper-V host will send a VSS_OP_HOT_BACKUP request to check if guest is ready for a live backup/snapshot. The driver should respond to the check only if the daemon is running and listening to requests. This allows the host to fallback to standard

[PATCH 4/7] Drivers: hv: ring_buffer: count on wrap around mappings in get_next_pkt_raw()

From: Vitaly Kuznetsov With wrap around mappings in place we can always provide drivers with direct links to packets on the ring buffer, even when they wrap around. Do the required updates to get_next_pkt_raw()/put_pkt_raw() Signed-off-by: Vitaly Kuznetsov

[PATCH 2/7] Drivers: hv: ring_buffer: wrap around mappings for ring buffers

From: Vitaly Kuznetsov Make it possible to always use a single memcpy() or to provide a direct link to a packet on the ring buffer by creating virtual mapping for two copies of the ring buffer with vmap(). Utilize currently empty hv_ringbuffer_cleanup() to do the unmap.

[PATCH 3/7] Drivers: hv: ring_buffer: use wrap around mappings in hv_copy{from, to}_ringbuffer()

From: Vitaly Kuznetsov With wrap around mappings for ring buffers we can always use a single memcpy() to do the job. Signed-off-by: Vitaly Kuznetsov Signed-off-by: K. Y. Srinivasan Tested-by: Dexuan Cui ---

[PATCH 0/7] Drivers: hv: Some miscellaneous fixes

From: K. Y. Srinivasan Some miscellaneous fixes and enhancements. These patches were all sent earlier but failed to apply clean on Greg's tree. These have now been rebased. Alex Ng (2): Drivers: hv: utils: Continue to poll VSS channel after handling requests.

[PATCH 1/1] Drivers: hv: hv_util: Avoid dynamic allocation in time synch

From: Vivek yadav Under stress, we have seen allocation failure in time synch code. Avoid this dynamic allocation. Signed-off-by: Vivek Yadav Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_util.c | 39

[PATCH V2 1/1] hv: do not lose pending heartbeat vmbus packets

From: Long Li The host keeps sending heartbeat packets independent of the guest responding to them. Even though we respond to the heartbeat messages at interrupt level, we can have situations where there maybe multiple heartbeat messages pending that have not been

[PATCH 1/1] hv: do not lose pending heartbeat vmbus packets

From: Long Li The host keeps sending heartbeat packets independent of the guest responding to them. Even though we respond to the heartbeat messages at interrupt level, we can have situations where there maybe multiple heartbeat messages pending that have not been

[PATCH 2/2] Drivers: hv: get rid of id in struct vmbus_channel

From: Vitaly Kuznetsov The auto incremented counter is not being used anymore, get rid of it. Signed-off-by: Vitaly Kuznetsov Signed-off-by: K. Y. Srinivasan --- drivers/hv/channel_mgmt.c |2 -- include/linux/hyperv.h|

[PATCH 1/2] Drivers: hv: make VMBus bus ids persistent

From: Vitaly Kuznetsov Some tools use bus ids to identify devices and they count on the fact that these ids are persistent across reboot. This may be not true for VMBus as we use auto incremented counter from alloc_channel() as such id. Switch to using if_instance from

[PATCH 0/2] Drivers: hv: vmbus: Use persistent IDs for vmbus device names

From: K. Y. Srinivasan Use IDs that persist across reboots as vmbus device IDs. Vitaly Kuznetsov (2): Drivers: hv: make VMBus bus ids persistent Drivers: hv: get rid of id in struct vmbus_channel drivers/hv/channel_mgmt.c |2 -- drivers/hv/vmbus_drv.c|4

[PATCH 1/1] Drivers: hv: hv_util: Avoid dynamic allocation in time synch

From: Vivek yadav Under stress, we have seen allocation failure in time synch code. Avoid this dynamic allocation. Signed-off-by: Vivek Yadav Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_util.c | 39

[PATCH 0/2] Drivers: hv: util: Some fixes to the backup driver

From: K. Y. Srinivasan Some fixes to the backup driver. Alex Ng (2): Drivers: hv: utils: Continue to poll VSS channel after handling requests. Drivers: hv: utils: Check VSS daemon is listening before a hot backup drivers/hv/hv_snapshot.c | 92

[PATCH 1/2] Drivers: hv: utils: Continue to poll VSS channel after handling requests.

From: Alex Ng Multiple VSS_OP_HOT_BACKUP requests may arrive in quick succession, even though the host only signals once. The driver wass handling the first request while ignoring the others in the ring buffer. We should poll the VSS channel after handling a request to

[PATCH 2/2] Drivers: hv: utils: Check VSS daemon is listening before a hot backup

From: Alex Ng Hyper-V host will send a VSS_OP_HOT_BACKUP request to check if guest is ready for a live backup/snapshot. The driver should respond to the check only if the daemon is running and listening to requests. This allows the host to fallback to standard

[PATCH V3 03/14] Drivers: hv: utils: Fix the mapping between host version and protocol to use

From: Alex Ng We should intentionally declare the protocols to use for every known host and default to using the latest protocol if the host is unknown or new. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan ---

[PATCH V3 14/14] Drivers: hv: vmbus: On the read path cleanup the logic to interrupt the host

From: K. Y. Srinivasan Signal the host when we determine the host is to be signaled - on th read path. The currrent code determines the need to signal in the ringbuffer code and actually issues the signal elsewhere. This can result in the host viewing this interrupt as

[PATCH V3 07/14] Drivers: hv: vss: Operation timeouts should match host expectation

From: Alex Ng Increase the timeout of backup operations. When system is under I/O load, it needs more time to freeze. These timeout values should also match the host timeout values more closely. Signed-off-by: Alex Ng Signed-off-by: K. Y.

[PATCH V3 04/14] Drivers: hv: balloon: Disable hot add when CONFIG_MEMORY_HOTPLUG is not set

From: Alex Ng If the guest does not support memory hotplugging, it should respond to the host with zero pages added and successful result code. This signals to the host that hotplugging is not supported and the host will avoid sending future hot-add requests.

[PATCH V3 10/14] tools: hv: fix a compile warning in snprintf

From: Weibing Zhang hv_kvp_daemon.c: In function .kvp_mac_to_if_name.: hv_kvp_daemon.c:705:2: warning: format not a string literal and no format arguments [-Wformat-security] snprintf(dev_id, sizeof(dev_id), kvp_net_dir); ^ hv_kvp_daemon.c:705:2: warning: format not

[PATCH V3 13/14] Drivers: hv: vmbus: On write cleanup the logic to interrupt the host

ritten anything. This is a rare -* enough condition that it should not matter. -* NOTE: in this case, the hvsock channel is an exception, because -* it looks the host side's hvsock implementation has a throttling -* mechanism which can hurt the performance otherwise. -

[PATCH V3 01/14] Drivers: hv: ring_buffer: count on wrap around mappings in get_next_pkt_raw() (v2)

From: Vitaly Kuznetsov With wrap around mappings in place we can always provide drivers with direct links to packets on the ring buffer, even when they wrap around. Do the required updates to get_next_pkt_raw()/put_pkt_raw() The first version of this commit was reverted

[PATCH V3 12/14] Drivers: hv: vmbus: Base host signaling strictly on the ring state

g * mechanism which can hurt the performance otherwise. +* +* KYS: Oct. 30, 2016: +* It looks like Windows hosts have logic to deal with DOS attacks that +* can be triggered if it receives interrupts when it is not expecting +* the interrupt. The h

[PATCH V3 11/14] tools: hv: remove unnecessary header files and netlink related code

From: Weibing Zhang Remove unnecessary header files and netlink related code as the daemons do not use netlink to communicate with the kernel now. Signed-off-by: Weibing Zhang Signed-off-by: K. Y. Srinivasan ---

[PATCH V3 02/14] Drivers: hv: utils: reduce HV_UTIL_NEGO_TIMEOUT timeout

From: Vitaly Kuznetsov I discovered that at least WS2016TP5 host has 60 seconds timeout for the ICMSGTYPE_NEGOTIATE message so we need to lower guest's timeout a little bit to make sure we always respond in time. Let's make it 55 seconds. Signed-off-by: Vitaly Kuznetsov

[PATCH V3 05/14] Drivers: hv: balloon: Add logging for dynamic memory operations

From: Alex Ng Added logging to help troubleshoot common ballooning, hot add, and versioning issues. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_balloon.c | 31

[PATCH V3 09/14] tools: hv: remove unnecessary link flag

From: Weibing Zhang The link flag pthread is not needed. Signed-off-by: Weibing Zhang Signed-off-by: K. Y. Srinivasan --- tools/hv/Makefile |3 +-- 1 files changed, 1 insertions(+), 2 deletions(-) diff --git

[PATCH V3 00/14] Drivers: hv: Some miscellaneous fixes and enhancements

From: K. Y. Srinivasan Some miscellaneous fixes and enhancements. V2: Fixed a build issue reported by Greg. Only Patch # 13 is affected. V3: Address Stephen's comment. Only patch 3 is affected. Alex Ng (6): Drivers: hv: utils: Fix the mapping between host version and

[PATCH V3 06/14] Drivers: hv: vss: Improve log messages.

From: Alex Ng Adding log messages to help troubleshoot error cases and transaction handling. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_snapshot.c | 25 +++-- 1 files

[PATCH V3 08/14] Drivers: hv: balloon: Fix info request to show max page count

From: Alex Ng Balloon driver was only printing the size of the info blob and not the actual content. This fixes it so that the info blob (max page count as configured in Hyper-V) is printed out. Signed-off-by: Alex Ng Signed-off-by: K. Y.

[PATCH 1/1] vmbus: make sysfs names consistent with PCI

From: Stephen Hemminger In commit 9a56e5d6a0ba ("Drivers: hv: make VMBus bus ids persistent") the name of vmbus devices in sysfs changed to be (in 4.9-rc1): /sys/bus/vmbus/vmbus-6aebe374-9ba0-11e6-933c-00259086b36b The prefix ("vmbus-") is redundant and differs from

[PATCH 02/15] Drivers: hv: utils: reduce HV_UTIL_NEGO_TIMEOUT timeout

From: Vitaly Kuznetsov I discovered that at least WS2016TP5 host has 60 seconds timeout for the ICMSGTYPE_NEGOTIATE message so we need to lower guest's timeout a little bit to make sure we always respond in time. Let's make it 55 seconds. Signed-off-by: Vitaly Kuznetsov

[PATCH 12/15] vmbus: make sysfs names consistent with PCI

From: Stephen Hemminger In commit 9a56e5d6a0ba ("Drivers: hv: make VMBus bus ids persistent") the name of vmbus devices in sysfs changed to be (in 4.9-rc1): /sys/bus/vmbus/vmbus-6aebe374-9ba0-11e6-933c-00259086b36b The prefix ("vmbus-") is redundant and differs from

[PATCH 03/15] Drivers: hv: utils: Fix the mapping between host version and protocol to use

From: Alex Ng We should intentionally declare the protocols to use for every known host and default to using the latest protocol if the host is unknown or new. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan ---

[PATCH 14/15] Drivers: hv: vmbus: On write cleanup the logic to interrupt the host

e may not have written anything. This is a rare -* enough condition that it should not matter. -* NOTE: in this case, the hvsock channel is an exception, because -* it looks the host side's hvsock implementation has a throttling -* mechanism which can hurt the performance other

[PATCH 06/15] Drivers: hv: vss: Improve log messages.

From: Alex Ng Adding log messages to help troubleshoot error cases and transaction handling. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_snapshot.c | 25 +++-- 1 files

[PATCH 09/15] tools: hv: remove unnecessary link flag

From: Weibing Zhang The link flag pthread is not needed. Signed-off-by: Weibing Zhang Signed-off-by: K. Y. Srinivasan --- tools/hv/Makefile |3 +-- 1 files changed, 1 insertions(+), 2 deletions(-) diff --git

[PATCH 08/15] Drivers: hv: balloon: Fix info request to show max page count

From: Alex Ng Balloon driver was only printing the size of the info blob and not the actual content. This fixes it so that the info blob (max page count as configured in Hyper-V) is printed out. Signed-off-by: Alex Ng Signed-off-by: K. Y.

[PATCH 07/15] Drivers: hv: vss: Operation timeouts should match host expectation

From: Alex Ng Increase the timeout of backup operations. When system is under I/O load, it needs more time to freeze. These timeout values should also match the host timeout values more closely. Signed-off-by: Alex Ng Signed-off-by: K. Y.

[PATCH 11/15] tools: hv: remove unnecessary header files and netlink related code

From: Weibing Zhang Remove unnecessary header files and netlink related code as the daemons do not use netlink to communicate with the kernel now. Signed-off-by: Weibing Zhang Signed-off-by: K. Y. Srinivasan ---

[PATCH 15/15] Drivers: hv: vmbus: On the read path cleanup the logic to interrupt the host

From: K. Y. Srinivasan Signal the host when we determine the host is to be signaled - on th read path. The currrent code determines the need to signal in the ringbuffer code and actually issues the signal elsewhere. This can result in the host viewing this interrupt as

[PATCH 01/15] Drivers: hv: ring_buffer: count on wrap around mappings in get_next_pkt_raw() (v2)

From: Vitaly Kuznetsov With wrap around mappings in place we can always provide drivers with direct links to packets on the ring buffer, even when they wrap around. Do the required updates to get_next_pkt_raw()/put_pkt_raw() The first version of this commit was reverted

[PATCH 13/15] Drivers: hv: vmbus: Base host signaling strictly on the ring state

g * mechanism which can hurt the performance otherwise. +* +* KYS: Oct. 30, 2016: +* It looks like Windows hosts have logic to deal with DOS attacks that +* can be triggered if it receives interrupts when it is not expecting +* the interrupt. The h

[PATCH 10/15] tools: hv: fix a compile warning in snprintf

From: Weibing Zhang hv_kvp_daemon.c: In function .kvp_mac_to_if_name.: hv_kvp_daemon.c:705:2: warning: format not a string literal and no format arguments [-Wformat-security] snprintf(dev_id, sizeof(dev_id), kvp_net_dir); ^ hv_kvp_daemon.c:705:2: warning: format not

[PATCH 04/15] Drivers: hv: balloon: Disable hot add when CONFIG_MEMORY_HOTPLUG is not set

From: Alex Ng If the guest does not support memory hotplugging, it should respond to the host with zero pages added and successful result code. This signals to the host that hotplugging is not supported and the host will avoid sending future hot-add requests.

[PATCH 00/15] Drivers: hv: Some miscellaneous fixes and enhancements

From: K. Y. Srinivasan Some miscellaneous fixes and enhancements. Alex Ng (6): Drivers: hv: utils: Fix the mapping between host version and protocol to use Drivers: hv: balloon: Disable hot add when CONFIG_MEMORY_HOTPLUG is not set Drivers: hv: balloon: Add

[PATCH V2 10/14] tools: hv: fix a compile warning in snprintf

From: Weibing Zhang hv_kvp_daemon.c: In function .kvp_mac_to_if_name.: hv_kvp_daemon.c:705:2: warning: format not a string literal and no format arguments [-Wformat-security] snprintf(dev_id, sizeof(dev_id), kvp_net_dir); ^ hv_kvp_daemon.c:705:2: warning: format not

[PATCH V2 08/14] Drivers: hv: balloon: Fix info request to show max page count

From: Alex Ng Balloon driver was only printing the size of the info blob and not the actual content. This fixes it so that the info blob (max page count as configured in Hyper-V) is printed out. Signed-off-by: Alex Ng Signed-off-by: K. Y.

[PATCH V2 12/14] Drivers: hv: vmbus: Base host signaling strictly on the ring state

g * mechanism which can hurt the performance otherwise. +* +* KYS: Oct. 30, 2016: +* It looks like Windows hosts have logic to deal with DOS attacks that +* can be triggered if it receives interrupts when it is not expecting +* the interrupt. The h

[PATCH V2 01/14] Drivers: hv: ring_buffer: count on wrap around mappings in get_next_pkt_raw() (v2)

From: Vitaly Kuznetsov With wrap around mappings in place we can always provide drivers with direct links to packets on the ring buffer, even when they wrap around. Do the required updates to get_next_pkt_raw()/put_pkt_raw() The first version of this commit was reverted

[PATCH V2 13/14] Drivers: hv: vmbus: On write cleanup the logic to interrupt the host

ritten anything. This is a rare -* enough condition that it should not matter. -* NOTE: in this case, the hvsock channel is an exception, because -* it looks the host side's hvsock implementation has a throttling -* mechanism which can hurt the performance otherwise. -

[PATCH V2 05/14] Drivers: hv: balloon: Add logging for dynamic memory operations

From: Alex Ng Added logging to help troubleshoot common ballooning, hot add, and versioning issues. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_balloon.c | 31

[PATCH V2 11/14] tools: hv: remove unnecessary header files and netlink related code

From: Weibing Zhang Remove unnecessary header files and netlink related code as the daemons do not use netlink to communicate with the kernel now. Signed-off-by: Weibing Zhang Signed-off-by: K. Y. Srinivasan ---

[PATCH V2 06/14] Drivers: hv: vss: Improve log messages.

From: Alex Ng Adding log messages to help troubleshoot error cases and transaction handling. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_snapshot.c | 25 +++-- 1 files

[PATCH V2 04/14] Drivers: hv: balloon: Disable hot add when CONFIG_MEMORY_HOTPLUG is not set

From: Alex Ng If the guest does not support memory hotplugging, it should respond to the host with zero pages added and successful result code. This signals to the host that hotplugging is not supported and the host will avoid sending future hot-add requests.

[PATCH V2 02/14] Drivers: hv: utils: reduce HV_UTIL_NEGO_TIMEOUT timeout

From: Vitaly Kuznetsov I discovered that at least WS2016TP5 host has 60 seconds timeout for the ICMSGTYPE_NEGOTIATE message so we need to lower guest's timeout a little bit to make sure we always respond in time. Let's make it 55 seconds. Signed-off-by: Vitaly Kuznetsov

[PATCH V2 14/14] Drivers: hv: vmbus: On the read path cleanup the logic to interrupt the host

From: K. Y. Srinivasan Signal the host when we determine the host is to be signaled - on th read path. The currrent code determines the need to signal in the ringbuffer code and actually issues the signal elsewhere. This can result in the host viewing this interrupt as

[PATCH V2 00/14] Drivers: hv: Some miscellaneous fixes and enhancements

From: K. Y. Srinivasan Some miscellaneous fixes and enhancements. V2: Fixed a build issue reported by Greg. Only Patch # 13 is affected. Alex Ng (6): Drivers: hv: utils: Fix the mapping between host version and protocol to use Drivers: hv: balloon: Disable hot add

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