tcp_tso_should_defer() can return true in three different cases :
1) We are cwnd-limited
2) We are rwnd-limited
3) We are application limited.
Neal pointed out that my recent fix went too far, since
it assumed that if we were not in 1) case, we must be rwnd-limited
Fix this by properly populating the is_cwnd_limited and
is_rwnd_limited booleans.
After this change, we can finally move the silly check for FIN
flag only for the application-limited case.
The same move for EOR bit will be handled in net-next,
since commit 1c09f7d073 ("tcp: do not try to defer skbs
with eor mark (MSG_EOR)") is scheduled for linux-4.21
Tested by running 200 concurrent netperf -t TCP_RR -- -r 60000,100
and checking none of them was rwnd_limited in the chrono_stat
output from "ss -ti" command.
Fixes: 41727549de ("tcp: Do not underestimate rwnd_limited")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
after set SO_DONTROUTE to 1, the IP layer should not route packets if
the dest IP address is not in link scope. But if the socket has cached
the dst_entry, such packets would be routed until the sk_dst_cache
expires. So we should clean the sk_dst_cache when a user set
SO_DONTROUTE option. Below are server/client python scripts which
could reprodue this issue:
server side code:
==========================================================================
import socket
import struct
import time
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('0.0.0.0', 9000))
s.listen(1)
sock, addr = s.accept()
sock.setsockopt(socket.SOL_SOCKET, socket.SO_DONTROUTE, struct.pack('i', 1))
while True:
sock.send(b'foo')
time.sleep(1)
==========================================================================
client side code:
==========================================================================
import socket
import time
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('server_address', 9000))
while True:
data = s.recv(1024)
print(data)
==========================================================================
Signed-off-by: yupeng <yupeng0921@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The existing garbage collection algorithm has a number of problems:
1. The gc algorithm will not evict PERMANENT entries as those entries
are managed by userspace, yet the existing algorithm walks the entire
hash table which means it always considers PERMANENT entries when
looking for entries to evict. In some use cases (e.g., EVPN) there
can be tens of thousands of PERMANENT entries leading to wasted
CPU cycles when gc kicks in. As an example, with 32k permanent
entries, neigh_alloc has been observed taking more than 4 msec per
invocation.
2. Currently, when the number of neighbor entries hits gc_thresh2 and
the last flush for the table was more than 5 seconds ago gc kicks in
walks the entire hash table evicting *all* entries not in PERMANENT
or REACHABLE state and not marked as externally learned. There is no
discriminator on when the neigh entry was created or if it just moved
from REACHABLE to another NUD_VALID state (e.g., NUD_STALE).
It is possible for entries to be created or for established neighbor
entries to be moved to STALE (e.g., an external node sends an ARP
request) right before the 5 second window lapses:
-----|---------x|----------|-----
t-5 t t+5
If that happens those entries are evicted during gc causing unnecessary
thrashing on neighbor entries and userspace caches trying to track them.
Further, this contradicts the description of gc_thresh2 which says
"Entries older than 5 seconds will be cleared".
One workaround is to make gc_thresh2 == gc_thresh3 but that negates the
whole point of having separate thresholds.
3. Clearing *all* neigh non-PERMANENT/REACHABLE/externally learned entries
when gc_thresh2 is exceeded is over kill and contributes to trashing
especially during startup.
This patch addresses these problems as follows:
1. Use of a separate list_head to track entries that can be garbage
collected along with a separate counter. PERMANENT entries are not
added to this list.
The gc_thresh parameters are only compared to the new counter, not the
total entries in the table. The forced_gc function is updated to only
walk this new gc_list looking for entries to evict.
2. Entries are added to the list head at the tail and removed from the
front.
3. Entries are only evicted if they were last updated more than 5 seconds
ago, adhering to the original intent of gc_thresh2.
4. Forced gc is stopped once the number of gc_entries drops below
gc_thresh2.
5. Since gc checks do not apply to PERMANENT entries, gc levels are skipped
when allocating a new neighbor for a PERMANENT entry. By extension this
means there are no explicit limits on the number of PERMANENT entries
that can be created, but this is no different than FIB entries or FDB
entries.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Salil Mehta says:
====================
net: hns3: Additions/optimizations related to HNS3 H/W err handling
This patch set primarily does following addtions and optimizations
related to error handling in HNS3 Ethernet driver:
1. Name changes for enable and process functions and minor loop
optimizations. [PATCH 1-6]
2. Modify query and clearing of RAS errors using new set of commands
because modules specific commands for clearing RCB PPP PF, SSU are
obselete. [PATCH 7]
3. Deletes logging 1-bit errors for RAS in HNS3 driver as these never
get reported to the driver. [PATCH 8]
4. Add handling of NIC hw errors reported through MSIx rather than
PCIe AER channel. [PATCH 9]
5. Add handling for the HW RAS and MSIx errors in the modules MAC, PPP
PF, MSIx SRAM, RCB and SSU. [PATCH 10-13]
6. Add handling of RoCEE RAS errors. [PATCH 14]
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch handles the RDMA RAS errors.
1. Enable RAS interrupt, print error detail info and clear error status.
2. Do CORE reset to recovery when these non-fatal errors happened.
Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch enables and handles hw errors of the Storage Switch Unit(SSU).
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch enables and handles hw RAS and MSIx errors of PPU(RCB).
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch handles PF hw errors of PPP(Programmable Packet Processor).
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds enable and handling of hw errors of
the MAC block.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds handling for HNS3 hardware errors(non-standard)
which are reported through MSIX interrupts and not through
PCIe AER channel.
These MSIX reported hardware errors are handled using common
misc. interrupt handler. Hardware error related registers
cannot be cleared in context to the interrupt received as
they require *heavy* access to hardware using IMP(Integrated
Mangement Processor) commands. Hence, we defer the clearing
of such error events till later time.
Since, we have defered exact identification of errors we
will have to defer the level of receovery/reset which
might be required. Hence, a new reset type UNKNOWN reset
has been introduced which effectively defers the assertion
of the reset till we get hold of kind of errors at later
time.
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch deletes logging 1 bit errors for the following reasons.
1. AER does not notify 1 bit errors to the device drivers.
However AER reports 1 bit errors to the userspace through the
trace_aer_event for logging in the rasdaemon.
2. Firmware clears the status of 1 bit errors in the hw registers.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1. This patch adds handling of hw ras errors using new set of
common commands.
2. Updated the error message tables to match the register's name and
error status returned by the commands.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1. This patch adds minor loop optimization in the
hclge_hw_error_set_state function.
2. Adds logging module's name if it fails to configure the
error interrupts.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch renames process_hw_error function to
handle_hw_ras_error function to match the purpose
of the function. This is because hw errors reported through
ras and msix interrupts will be handled separately.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch deletes unnecessary setting of the descriptor data
to 0 for disabling error interrupts because
it is already done by the hclge_cmd_setup_basic_desc function.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds calling hclge_hw_error_set_state function
to re-enable the error interrupts those will be disabled on
the hw reset.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch
- renames the enable error interrupt functions.
The reason is that these functions
are used for both enable and disable error interrupts.
- removes redundant logs from the enable error interrupt functions.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1.The command interface for queryng and clearing hw errors is
changed, which requires the new process error functions to be added.
This patch removes all the current process error functions and
associated definitions. The new functions to handle ras errors
would be added in this patch set.
2. Fixed order issue of the hw_blk table.
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A couple of last-minute fixes.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost/virtio fixes from Michael Tsirkin:
"A couple of last-minute fixes"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost/vsock: fix use-after-free in network stack callers
virtio/s390: fix race in ccw_io_helper()
virtio/s390: avoid race on vcdev->config
vhost/vsock: fix reset orphans race with close timeout
Pull crypto fixes from Herbert Xu:
- Disable the new crypto stats interface as it's still being changed
- Fix potential uses-after-free in cbc/cfb/pcbc.
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: user - Disable statistics interface
crypto: do not free algorithm before using
Ido Schimmel says:
====================
mlxsw: Un/offload FDB on NVE detach/attach
Petr says:
When a VXLAN device is attached to a bridge of a driver capable of
offloading such, or upped, the FDB entries already present at the device
need to be offloaded. Similarly when an offloaded VXLAN device ceases
being interesting (it is downed, or detached, or a front-panel port
netdevice is detached from the bridge that the VXLAN device is attached
to), any offloaded FDB entries need to be unoffloaded and unmarked. This
attach / detach processing is implemented in this patchset.
In patch #1, a code pattern is extracted into a named function for
easier reuse.
In patch #2, vxlan_fdb_replay() is added to send
SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE for each FDB entry with a given VNI.
The intention is that the offloading driver will interpret these events
like any other and thus offload the FDB entries that existed prior to
VXLAN attach.
In patches #3 and #4, the functions vxlan_fdb_clear_offload() resp.
br_fdb_clear_offload() are added. These clear the offloaded flag at
matching FDB entries.
In patches #5-#9, we introduce FID-type-specific and NVE-type-specific
ops necessary to properly abstract invocations of the replay/clear
functions.
Finally patch #10 implements the FDB management.
In patch #11, the mlxsw-specific test case is extended to check that the
management of offload marks under the newly-supported situations is
correct. Patch #12, from Ido, exercises the new code paths in actual
functional test.
v2:
- Patch #1:
- Modify vxlan_fdb_switchdev_notifier_info() to initialize the
structure through a passed-in pointer argument, instead of returning
it as a value.
- Patch #2:
- Adapt to API change in vxlan_fdb_switchdev_notifier_info()
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
When using VLAN-aware bridges with VXLAN, the VLAN that is mapped to the
VNI of the VXLAN device is that which is configured as "pvid untagged"
on the corresponding bridge port.
When these flags are toggled or when the VLAN is deleted entirely,
remote hosts should not be able to receive packets from the VTEP.
Add a test case for above mentioned scenarios.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When a VXLAN device is attached to an offloaded bridge, or when a
front-panel port is attached to a bridge that already has a VXLAN
device, mlxsw should offload the existing offloadable FDB entries.
Similarly when VXLAN device is downed, the FDB entries are unoffloaded,
and the marks thus need to be cleared. Similarly when a front-panel port
device is attached to a bridge with a VXLAN device, or when VLAN flags
are tweaked on a VXLAN port attached to a VLAN-aware bridge.
Test that the replaying / clearing logic works by observing transitions
in presence of offload marks under different scenarios.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Any existing NVE FDB entries need to be offloaded when NVE is enabled
for a given FID. Recent patches have added fdb_replay op for this, so
just invoke it from mlxsw_sp_nve_fid_enable().
When NVE is disabled on a FID, any existing FDB offloaded marks need to
be cleared on NVE device as well as on its bridge master. An op to
handle this, fdb_clear_offload, has been added to FID ops and NVE ops in
previous patches. Add code to resolve the NVE device, NVE type, and
dispatch to both fdb_clear_offload ops.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If there are any offloaded FDB entries at bridge master of an NVE device
at the time that it's un-offloaded, their offloaded marks need to be
cleared. How that is done depends on whether the bridge in question is
vlan aware. Therefore add a per-FID-type operation.
Implement the operation for the 802.1q and 802.1d bridges.
Add and publish a function mlxsw_sp_fid_fdb_clear_offload() to dispatch
to the new operation according to FID type.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If there are any offloaded FDB entries at an NVE device at the time that
it's un-offloaded, their offloaded marks need to be cleared. How that is
done depends on NVE device type, and therefore add a per-NVE-type
operation.
Implement the operation for the sole NVE device type currently supported
by mlxsw, VXLAN.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A replay of FDB needs to be performed so that the FDB entries existing
at the NVE device are offloaded. How the replay is done depends on NVE
device type, and therefore add a per-NVE-type operation.
Implement the operation for the sole NVE device type currently supported
by mlxsw, VXLAN.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The notifier block will need to be passed to vxlan_fdb_replay() in a
follow-up patch.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A follow-up patch will add support for replay and for clearing of
offload marks. These are NVE type-sensitive operations, and to be able
to dispatch them properly, a FID needs to know what NVE type is attached
to it.
Therefore, track the NVE type at struct mlxsw_sp_fid. Extend
mlxsw_sp_fid_vni_set() to take it as an argument, and add
mlxsw_sp_fid_nve_type().
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When a driver unoffloads all FDB entries en bloc, it's inefficient to
send the switchdev notification one by one. Add a helper that unsets the
offload flag on FDB entries on a given bridge port and VLAN.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When a driver unoffloads all FDB entries en bloc, it's inefficient to
send the switchdev notification one by one. Add a helper that walks the
FDB table, unsetting the offload flag on RDST with a given VNI.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When a VXLAN device becomes relevant to a driver (such as when it is
attached to an offloaded bridge), the driver will generally need to walk
the existing FDB entries and offload them.
Add a function vxlan_fdb_replay() to call a given notifier block for
each FDB entry with a given VNI.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There are currently two places that need to initialize the notifier info
structure, and one more is coming next when vxlan_fdb_replay() is
introduced. These three instances have / will have very similar code
that is easy to abstract away into a named function.
Add such function, vxlan_fdb_switchdev_notifier_info(), and call it from
vxlan_fdb_switchdev_call_notifiers() and vxlan_fdb_find_uc().
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'pci-v4.20-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
"Revert ASPM change that caused a regression"
* tag 'pci-v4.20-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
Revert "PCI/ASPM: Do not initialize link state when aspm_disabled is set"
Igor Russkikh says:
====================
net: aquantia: add RSS configuration
In this patchset few bugs related to RSS are fixed and RSS table and
hash key configuration is added.
We also do increase max number of HW rings upto 8.
v2: removed extra arg check
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Add support of configuration of RSS hash key and RSS indirection table.
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Now RSS indirection table is initialized before setting up the number of
hw queues, consequently the table may be filled by non existing queues.
This patch moves the initialization when the number of hw queues is
known.
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Increase the upper limit of the hw queues up to 8.
This makes RSS better on multiheaded cpus.
This is a maximum AQC hardware supports in one traffic class.
The actual value is still limited by a number of available cpu cores.
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Set RSS indirection table and RSS hash key sizes to their real size.
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In 'seg6_output', stack variable 'struct flowi6 fl6' was missing
initialization.
Fixes: 6c8702c60b ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels")
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'for-linus-20181207' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Let's try this again...
We're finally happy with the DM livelock issue, and it's also passed
overnight testing and the corruption regression test. The end result
is much nicer now too, which is great.
Outside of that fix, there's a pull request for NVMe with two small
fixes, and a regression fix for BFQ from this merge window. The BFQ
fix looks bigger than it is, it's 90% comment updates"
* tag 'for-linus-20181207' of git://git.kernel.dk/linux-block:
blk-mq: punt failed direct issue to dispatch list
nvmet-rdma: fix response use after free
nvme: validate controller state before rescheduling keep alive
block, bfq: fix decrement of num_active_groups
Pull i2c fixes from Wolfram Sang:
"A set of driver bugfixes for the I2C subsystem"
* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: uniphier-f: fix violation of tLOW requirement for Fast-mode
i2c: uniphier: fix violation of tLOW requirement for Fast-mode
i2c: uniphier-f: fill TX-FIFO only in IRQ handler for repeated START
i2c: uniphier-f: fix timeout error after reading 8 bytes
i2c: scmi: Fix probe error on devices with an empty SMB0001 ACPI device node
i2c: axxia: properly handle master timeout
i2c: rcar: check bus state before reinitializing
i2c: nvidia-gpu: limit reads also for combined messages
i2c: nvidia-gpu: adhere to I2C fault codes
dmaengine fixes for v4.20-rc6
- Fixing imx-sdma handling of channel terminations, this involves
reverting two commits and implement async termination
- Fix cppi dma channel deletion from pending list on stop
- Fix FIFO size for dw controller in Intel Merrifield
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Merge tag 'dmaengine-fix-4.20-rc6' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul:
"Another pull request for dmaengine. We got bunch of fixes early this
week and all are tagged to stable. Hope this is last fix for this
cycle:
- Fix imx-sdma handling of channel terminations, this involves
reverting two commits and implement async termination
- Fix cppi dma channel deletion from pending list on stop
- Fix FIFO size for dw controller in Intel Merrifield"
* tag 'dmaengine-fix-4.20-rc6' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: dw: Fix FIFO size for Intel Merrifield
dmaengine: cppi41: delete channel from pending list when stop channel
dmaengine: imx-sdma: use GFP_NOWAIT for dma descriptor allocations
dmaengine: imx-sdma: implement channel termination via worker
Revert "dmaengine: imx-sdma: alloclate bd memory from dma pool"
Revert "dmaengine: imx-sdma: Use GFP_NOWAIT for dma allocations"
GNU linker's -z common-page-size's default value is based on the target
architecture. arch/x86/entry/vdso/Makefile sets it to the architecture
default, which is implicit and redundant. Drop it.
Fixes: 2aae950b21 ("x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu")
Reported-by: Dmitry Golovin <dima@golovin.in>
Reported-by: Bill Wendling <morbo@google.com>
Suggested-by: Dmitry Golovin <dima@golovin.in>
Suggested-by: Rui Ueyama <ruiu@google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Fangrui Song <maskray@google.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20181206191231.192355-1-ndesaulniers@google.com
Link: https://bugs.llvm.org/show_bug.cgi?id=38774
Link: https://github.com/ClangBuiltLinux/linux/issues/31
Since commit 3b8c9f1cdf ("arm64: IPI each CPU after invalidating the
I-cache for kernel mappings"), a call to flush_icache_range() will use
an IPI to cross-call other online CPUs so that any stale instructions
are flushed from their pipelines. This triggers a WARN during the
hibernation resume path, where flush_icache_range() is called with
interrupts disabled and is therefore prone to deadlock:
| Disabling non-boot CPUs ...
| CPU1: shutdown
| psci: CPU1 killed.
| CPU2: shutdown
| psci: CPU2 killed.
| CPU3: shutdown
| psci: CPU3 killed.
| WARNING: CPU: 0 PID: 1 at ../kernel/smp.c:416 smp_call_function_many+0xd4/0x350
| Modules linked in:
| CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.20.0-rc4 #1
Since all secondary CPUs have been taken offline prior to invalidating
the I-cache, there's actually no need for an IPI and we can simply call
__flush_icache_range() instead.
Cc: <stable@vger.kernel.org>
Fixes: 3b8c9f1cdf ("arm64: IPI each CPU after invalidating the I-cache for kernel mappings")
Reported-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Tested-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Tested-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Pull NVMe fixes from Christoph.
* 'nvme-4.20' of git://git.infradead.org/nvme:
nvmet-rdma: fix response use after free
nvme: validate controller state before rescheduling keep alive
After the direct dispatch corruption fix, we permanently disallow direct
dispatch of non read/write requests. This works fine off the normal IO
path, as they will be retried like any other failed direct dispatch
request. But for the blk_insert_cloned_request() that only DM uses to
bypass the bottom level scheduler, we always first attempt direct
dispatch. For some types of requests, that's now a permanent failure,
and no amount of retrying will make that succeed. This results in a
livelock.
Instead of making special cases for what we can direct issue, and now
having to deal with DM solving the livelock while still retaining a BUSY
condition feedback loop, always just add a request that has been through
->queue_rq() to the hardware queue dispatch list. These are safe to use
as no merging can take place there. Additionally, if requests do have
prepped data from drivers, we aren't dependent on them not sharing space
in the request structure to safely add them to the IO scheduler lists.
This basically reverts ffe81d4532 and is based on a patch from Ming,
but with the list insert case covered as well.
Fixes: ffe81d4532 ("blk-mq: fix corruption with direct issue")
Cc: stable@vger.kernel.org
Suggested-by: Ming Lei <ming.lei@redhat.com>
Reported-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Ming Lei <ming.lei@redhat.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
nvmet_rdma_release_rsp() may free the response before using it at error
flow.
Fixes: 8407879 ("nvmet-rdma: fix possible bogus dereference under heavy load")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Eric Dumazet