__team_compute_features() uses netdev_increment_features() to
combine vlan_features of slaves into vlan_features of the team.
As netdev_increment_features() only adds most features and we
start with TEAM_VLAN_FEATURES, we can end up with features none
of the slaves provided.
Initialize vlan_features only with the flags which are both in
TEAM_VLAN_FEATURES and NETIF_F_ALL_FOR_ALL. Right now there is
no such feature so that we actually initialize vlan_features
with zero but stating it explicitely will make the code more
future proof.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
bond_compute_features() uses netdev_increment_features() to
combine vlan_features of slaves into vlan_features of the bond.
As netdev_increment_features() only adds most features and we
start with BOND_VLAN_FEATURES, we can end up with features none
of the slaves provided.
If there is at least one slave, initialize vlan_features only
with the flags in NETIF_F_ALL_FOR_ALL. Right now there is none
in BOND_VLAN_FEATURES but stating it explicitely will make the
code more future proof.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
When combining real_dev's features and vlan_features, simple
bitwise AND is used. This doesn't work well for checksum
offloading features as if one set has NETIF_F_HW_CSUM and the
other NETIF_F_IP_CSUM and/or NETIF_F_IPV6_CSUM, we end up with
no checksum offloading. However, from the logical point of view
(how can_checksum_protocol() works), NETIF_F_HW_CSUM contains
the functionality of NETIF_F_IP_CSUM and NETIF_F_IPV6_CSUM so
that the result should be IP/IPV6.
Add helper function netdev_intersect_features() implementing
this logic and use it in vlan_dev_fix_features().
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since imx serials FEC/ENET MDIO clock source is internal ipg clock,
and "ahb" clock is defined as FEC/ENET bus clock, so the patch just
correct the fec driver MDIO clock source.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Acked-by: Frank Li <frank.li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add below clock management to save fec power:
- After probe, disable all clocks incluing ipg, ahb, enet_out, ptp clock.
- Open ethx interface enable necessary clocks.
Close ethx interface disable all clocks.
The patch also encapsulates the all enet clocks enable/disable to
.fec_enet_clk_enable(), which can reduce the repetitional code in
driver.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Acked-by: Frank Li <Frank.li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ezequiel Garcia says:
====================
net: Introduce a software TSO helper API
Here's a first proposal for a generic software TSO helper API, following
David's suggestion.
There are at least two drivers that currently implement some form of software
TSO: Solarflare network driver (drivers/net/ethernet/sfc) and Tilera GX
network driver (drivers/net/ethernet/tile/tilegx.c).
The rationale behind adding a generic API is to provide a boiler plate with the
segmentation and other common tasks, making this support easier to add in other
drivers.
When designing the API, I've considered mainly two design choices:
1. Implement a series of callbacks that each driver would implement
and the net core code would call to fill in descriptors and egress
that data.
2. Implement an API for drivers to use in a driver's specific tx_tso
function. This functions would exhaust a sk_buff payload, and use the
API as helper for building the headers and segmented data.
I've chosen (2), to avoid function pointers (which was Willy's concern) and
because it seemed less fragile. Of course, this is argueable.
The API is by no means complete, and lacks some features, however it allows
to support TSO in mv643xx_eth and mvneta network drivers with some very
good performance results. I've added this support as an example of the API
in action.
In particular the following needs some revisiting:
1. IPv6 support is lacking.
2. The required descriptor counting needs some verification. The current
implementation might be too "sketchy". The tilegx one can be a good
starting point.
3. The implemenation assumes the hardware can compute the TCP and IP
checksums for the built headers. However, some controllers may need
some initial calculation (such as tilegx, for instance).
Despite this, I hope this proposal is good enough to trigger some discussion
and to check if I'm on the right track. Feedback is much appreciated!
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Now that the TSO helper API has been introduced, this commit makes use
of it to add support for software TSO in this driver.
This feature allows to improve outbound throughput performance significantly.
Running iperf tests shows a 30% improvement, tested on a Kirkwood Openblocks
A6 board.
$ ethtool -K eth0 tso off
$ iperf -c 192.168.0.45 -t 3
------------------------------------------------------------
Client connecting to 192.168.0.45, TCP port 5001
TCP window size: 43.8 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.159 port 46389 connected with 192.168.0.45 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 3.0 sec 217 MBytes 607 Mbits/sec
$ ethtool -K eth0 tso on
$ iperf -c 192.168.0.45 -t 3
------------------------------------------------------------
Client connecting to 192.168.0.45, TCP port 5001
TCP window size: 43.8 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.159 port 46390 connected with 192.168.0.45 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 3.0 sec 336 MBytes 938 Mbits/sec
This commit is just an example of the usage of the TSO API, it works fine
but needs some more work. In particular, the descriptor unmapping path must
avoid unmapping the TSO headers.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Using dma_map_single() instead of skb_frag_dma_map() allows to unmap
all the descriptors using dma_unmap_single(). This change allows
to introduce software TSO in a less intrusive way.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In order to ease the addition of new features, let's factorize the
feature list.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As specified in the datasheet, the driver can set the "L4Chk_Mode" flag
(bit 10) in the Tx descriptor command/status to specify that a frame is not
IP fragmented and that the controller is in charge of generating the TCP/IP
checksum. This must be used together with the "GL4chk" flag (bit 17).
These two flags allow to avoid setting the initial TCP checksum in the l4i_chk
field of the Tx descriptor, which is needed to support software TSO.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Make the code more readable by moving the initial checksum setup
and the command/status preparation to its own function.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Now that the TSO helper API has been introduced, this commit makes use
of it to implement the TSO in this driver.
Using iperf to test and vmstat to check the CPU usage, shows a substantial
CPU usage drop when TSO is on (~15% vs. ~25%). HTTP-based tests performed
by Willy Tarreau have shown performance improvements.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Rework mvneta_tx() so that the code that performs the final handling
before a sk_buff is transmitted is done only if the numbers of fragments
processed if positive.
This is preparation work to add the support for software TSO.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In order to ease the addition of new features, let's factorize the
feature list.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Although the implementation probably needs a lot of work, this initial API
allows to implement software TSO in mvneta and mv643xx_eth drivers in a not
so intrusive way.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pablo Neira Ayuso says:
====================
Netfilter/nftables updates for net-next
The following patchset contains Netfilter/nftables updates for net-next,
most relevantly they are:
1) Add set element update notification via netlink, from Arturo Borrero.
2) Put all object updates in one single message batch that is sent to
kernel-space. Before this patch only rules where included in the batch.
This series also introduces the generic transaction infrastructure so
updates to all objects (tables, chains, rules and sets) are applied in
an all-or-nothing fashion, these series from me.
3) Defer release of objects via call_rcu to reduce the time required to
commit changes. The assumption is that all objects are destroyed in
reverse order to ensure that dependencies betweem them are fulfilled
(ie. rules and sets are destroyed first, then chains, and finally
tables).
4) Allow to match by bridge port name, from Tomasz Bursztyka. This series
include two patches to prepare this new feature.
5) Implement the proper set selection based on the characteristics of the
data. The new infrastructure also allows you to specify your preferences
in terms of memory and computational complexity so the underlying set
type is also selected according to your needs, from Patrick McHardy.
6) Several cleanup patches for nft expressions, including one minor possible
compilation breakage due to missing mark support, also from Patrick.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jeff Kirsher says:
====================
Intel Wired LAN Driver Updates
This series contains updates to i40e and i40evf.
Shannon makes minor changes to the AdminQ interface to bring it up to
date. Removes the hard coding of stats struct size in ethtool, in prep
for adding data fields which are configuration dependent.
Catherine removes some unused and unneeded PCI bus defines.
Jesse fixes the copyright headers and finishes up the removal of the PTP
Tx work functionality which allows us to rely on the Tx timesync interrupt.
Mitch provides a number of fixes and cleanups for i40e/i40evf based on
suggestions from Ben Hutchings. First is to use a macro parameter for
ethtool stats instead of just assuming that a valid netdev variable
exists. Second is not to tell ethtool that the VF can do 10GbaseT, when
it really has no idea what its link speed is, so set the supported value
to 0 instead. Make the ethtool_ops structure constant since it is
extremely unlikely to change at runtime. Ethtool consistently reports
0 values for our ITR settings because we never actually use them, so
fix this by setting the default values to the specified default values.
Greg avoids a compile error by wrapping the call to i40e_alloc_vfs() in
CONFIG_PCI_IOV because the function itself is wrapped in the same
conditional compile block.
Alexander Gordeev updates the driver to use the new pci_enable_msi_range()
and pci_enable_msix_range() or pci_enable_msi_exact() and
pci_enable_msix_exact().
Jean Sacren provides a fix where the wrong error code was being passed to
i40e_open().
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Experience with the recent e114a710aa ("tcp: fix cwnd limited
checking to improve congestion control") has shown that there are
common cases where that commit can cause cwnd to be much larger than
necessary. This leads to TSO autosizing cooking skbs that are too
large, among other things.
The main problems seemed to be:
(1) That commit attempted to predict the future behavior of the
connection by looking at the write queue (if TSO or TSQ limit
sending). That prediction sometimes overestimated future outstanding
packets.
(2) That commit always allowed cwnd to grow to twice the number of
outstanding packets (even in congestion avoidance, where this is not
needed).
This commit improves both of these, by:
(1) Switching to a measurement-based approach where we explicitly
track the largest number of packets in flight during the past window
("max_packets_out"), and remember whether we were cwnd-limited at the
moment we finished sending that flight.
(2) Only allowing cwnd to grow to twice the number of outstanding
packets ("max_packets_out") in slow start. In congestion avoidance
mode we now only allow cwnd to grow if it was fully utilized.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
radeon fixes, VCE one is big but does fix a userspace crash.
* 'drm-fixes-3.15' of git://people.freedesktop.org/~deathsimple/linux:
drm/radeon/pm: don't allow debugfs/sysfs access when PX card is off (v2)
drm/radeon: avoid segfault on device open when accel is not working.
drm/radeon: fix typo in finding PLL params
drm/radeon: fix register typo on si
drm/radeon: fix buffer placement under memory pressure v2
drm/radeon: fix page directory update size estimation
drm/radeon: handle non-VGA class pci devices with ATRM
drm/radeon: fix DCE83 check for mullins
drm/radeon: check VCE relocation buffer range v3
drm/radeon: also try GART for CPU accessed buffers
fixes nasty panel bleeding bug.
* 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
drm/gf119-/disp: fix nasty bug which can clobber SOR0's clock setup
drm/nvd9/therm: handle another kind of PWM fan
When GRE support was added in linux-3.14, CHECKSUM_COMPLETE handling
broke on GRE+IPv6 because we did not update/use the appropriate csum :
GRO layer is supposed to use/update NAPI_GRO_CB(skb)->csum instead of
skb->csum
Tested using a GRE tunnel and IPv6 traffic. GRO aggregation now happens
at the first level (ethernet device) instead of being done in gre
tunnel. Native IPv6+TCP is still properly aggregated.
Fixes: bf5a755f5e ("net-gre-gro: Add GRE support to the GRO stack")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jerry Chu <hkchu@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Delete unnecessary local variable whose value is always 0 and that hides
the fact that the result is always 0.
A simplified version of the semantic patch that fixes this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
local idexpression ret;
expression e;
position p;
@@
-ret = 0;
... when != ret = e
return
- ret
+ 0
;
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kernel API for classic BPF socket filters is:
sk_unattached_filter_create() - validate classic BPF, convert, JIT
SK_RUN_FILTER() - run it
sk_unattached_filter_destroy() - destroy socket filter
Cleanup internal BPF kernel API as following:
sk_filter_select_runtime() - final step of internal BPF creation.
Try to JIT internal BPF program, if JIT is not available select interpreter
SK_RUN_FILTER() - run it
sk_filter_free() - free internal BPF program
Disallow direct calls to BPF interpreter. Execution of the BPF program should
be done with SK_RUN_FILTER() macro.
Example of internal BPF create, run, destroy:
struct sk_filter *fp;
fp = kzalloc(sk_filter_size(prog_len), GFP_KERNEL);
memcpy(fp->insni, prog, prog_len * sizeof(fp->insni[0]));
fp->len = prog_len;
sk_filter_select_runtime(fp);
SK_RUN_FILTER(fp, ctx);
sk_filter_free(fp);
Sockets, seccomp, testsuite, tracing are using different ways to populate
sk_filter, so first steps of program creation are not common.
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Govindarajulu Varadarajan says:
====================
enic: Add adaptive coalescing interrupt support
This series add support for adaptive coalescing interrupt and updates
enic Maintainers.
v1->v2:
* Add commit log
* do vnic_intr_coalescing_timer_set only while enabling intr
* use ktime_get instead of hrtimer
* make enic_set_rx_coal_setting return type void
* change func name enic_apply_int_moderation to enic_calc_int_moderation
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds support for adaptive interrupt coalescing.
For small pkts with low pkt rate, we can decrease the coalescing interrupt
dynamically which decreases the latency. This however increases the cpu
utilization. Based on testing with different coal intr and pkt rate we came up
with a table(mod_table) with rx_rate and coalescing interrupt value where we
get low latency without significant increase in cpu. mod_table table stores
the coalescing timer percentage value for different throughputs.
Function enic_calc_int_moderation() calculates the desired coalescing intr timer
value. This function is called in driver rx napi_poll. The actual value is set
by enic_set_int_moderation() which is called when napi_poll is complete. i.e
when we unmask the rx intr.
Adaptive coal intr is support only when driver is using msix intr. Because
intr is not shared.
Struct mod_range is used to store only the default adaptive coalescing intr
value.
Adaptive coal intr calue is calculated by
timer = range_start + ((rx_coal->range_end - range_start) *
mod_table[index].range_percent / 100);
rx_coal->range_end is the rx-usecs-high value set using ethtool.
range_start is rx-usecs-low, set using ethtool, if rx_small_pkt_bytes_cnt is
greater than 2 * rx_large_pkt_bytes_cnt. i.e small pkts are dominant. Else its
rx-usecs-low + 3.
Cc: Christian Benvenuti <benve@cisco.com>
Cc: Neel Patel <neepatel@cisco.com>
Signed-off-by: Sujith Sankar <ssujith@cisco.com>
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull two powerpc fixes from Ben Herrenschmidt:
"Here are a couple of fixes for 3.15. One from Anton fixes a nasty
regression I introduced when trying to fix a loss of irq_work whose
consequences is that we can completely lose timer interrupts on a
CPU... not pretty.
The other one is a change to our PCIe reset hook to use a firmware
call instead of direct config space accesses to trigger a fundamental
reset on the root port. This is necessary so that the FW gets a
chance to disable the link down error monitoring, which would
otherwise trip and cause subsequent fatal EEH error"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: irq work racing with timer interrupt can result in timer interrupt hang
powerpc/powernv: Reset root port in firmware
To be future-proof and for better readability the time comparisons are modified
to use time_before() instead of plain, error-prone math.
Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull two btrfs fixes from Chris Mason:
"This has two fixes that we've been testing for 3.16, but since both
are safe and fix real bugs, it makes sense to send for 3.15 instead"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: send, fix incorrect ref access when using extrefs
Btrfs: fix EIO on reading file after ioctl clone works on it
Pull two ceph fixes from Sage Weil:
"The first patch fixes a problem when we have a page count of 0 for
sendpage which is triggered by zfs. The second fixes a bug in CRUSH
that was resolved in the userland code a while back but fell through
the cracks on the kernel side"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
crush: decode and initialize chooseleaf_vary_r
libceph: fix corruption when using page_count 0 page in rbd
Code inspection of the XFS error number sign translations found a bunch of
issues, including returning incorrectly signed errors for some data integrity
operations. These leak to userspace and result in applications not getting the
errors correctly reported. Hence they need fixing sooner rather than later.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=5syB
-----END PGP SIGNATURE-----
Merge tag 'xfs-for-linus-3.15-rc6' of git://oss.sgi.com/xfs/xfs
Pull xfs fixes from Dave Chinner:
"Code inspection of the XFS error number sign translations found a
bunch of issues, including returning incorrectly signed errors for
some data integrity operations.
These leak to userspace and result in applications not getting the
errors correctly reported. Hence they need fixing sooner rather than
later.
A couple of the bugs are in data integrity operations, a couple more
are in the new COLLAPSE_RANGE code. One of these came in through a
recent ext4 merge and so I had to update the base tree to 3.15-rc5
before fixing the issues"
* tag 'xfs-for-linus-3.15-rc6' of git://oss.sgi.com/xfs/xfs:
xfs: list_lru_init returns a negative error
xfs: negate xfs_icsb_init_counters error value
xfs: negate mount workqueue init error value
xfs: fix wrong err sign on xfs_set_acl()
xfs: fix wrong errno from xfs_initxattrs
xfs: correct error sign on COLLAPSE_RANGE errors
xfs: xfs_commit_metadata returns wrong errno
xfs: fix incorrect error sign in xfs_file_aio_read
xfs: xfs_dir_fsync() returns positive errno
Pull renameat2 arch support from Miklos Szeredi:
"I've collected architecture patches for the renameat2 syscall that
maintainers acked and/or asked me to queue.
This adds architecture support for the renameat2 syscall to m68k,
parisc, ia64 and through asm-generic to arc, arm64, c6x, hexagon,
metag, openrisc, score, tile, unicore32"
* 'renameat2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
scripts/checksyscalls.sh: Make renameat optional
asm-generic: Add renameat2 syscall
ia64: add renameat2 syscall
parisc: add renameat2 syscall
m68k: add renameat2 syscall
This patch moves data allocated using kzalloc to managed data allocated
using devm_kzalloc and cleans now unnecessary kfrees in probe and remove
functions. An explicit linux/device.h include is added to make sure
the devm_*() routine declarations are unambiguously available.
The following Coccinelle semantic patch was used for making the change:
@platform@
identifier p, probefn, removefn;
@@
struct platform_driver p = {
.probe = probefn,
.remove = removefn,
};
@prb@
identifier platform.probefn, pdev;
expression e, e1, e2;
@@
probefn(struct platform_device *pdev, ...) {
<+...
- e = kzalloc(e1, e2)
+ e = devm_kzalloc(&pdev->dev, e1, e2)
...
?-kfree(e);
...+>
}
@rem depends on prb@
identifier platform.removefn;
expression e;
@@
removefn(...) {
<...
- kfree(e);
...>
}
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Remove double checks, convert printk to pr_warn, and move the call to
pr_warn to the first check. The simplified version of the coccinelle
semantic patch that find this issue is as follows:
// <smpl>
@@
expression E; identifier pr; expression list es;
@@
while(...){
...
- if (E) break;
+ if (E){
+ pr(es);
+ break;
+ }
...
}
- if(E) pr(es);
// </smpl>
Tested by compilation only.
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
found by cppcheck
Signed-off-by: Toralf Förster <toralf.foerster@gmx.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
entries is always greater than rt_max_size here, since if entries is less
than rt_max_size, the fib6_run_gc function will be skipped
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
tun_do_read always adds current thread to wait queue, even if a packet
is ready to read. This is inefficient because both sleeper and waker
want to acquire the wait queue spin lock when packet rate is high.
We restructure the read function and use common kernel networking
routines to handle receive, sleep and wakeup. With the change
available packets are checked first before the reading thread is added
to the wait queue.
Ran performance tests with the following configuration:
- my packet generator -> tap1 -> br0 -> tap0 -> my packet consumer
- sender pinned to one core and receiver pinned to another core
- sender send small UDP packets (64 bytes total) as fast as it can
- sandy bridge cores
- throughput are receiver side goodput numbers
The results are
baseline: 731k pkts/sec, cpu utilization at 1.50 cpus
changed: 783k pkts/sec, cpu utilization at 1.53 cpus
The performance difference is largely determined by packet rate and
inter-cpu communication cost. For example, if the sender and
receiver are pinned to different cpu sockets, the results are
baseline: 558k pkts/sec, cpu utilization at 1.71 cpus
changed: 690k pkts/sec, cpu utilization at 1.67 cpus
Co-authored-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xi Wang <xii@google.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Enable the module alias hookup to allow tunnel modules to be autoloaded on demand.
This is in line with how most other netdev kinds work, and will allow userspace
to create tunnels without having CAP_SYS_MODULE.
Signed-off-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 Fixes for the AMD IOMMU driver:
* Fix a locking issue around get_user_pages()
* Fix 2 issues with device aliasing and
exclusion range handling
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=3Wdm
-----END PGP SIGNATURE-----
Merge tag 'iommu-fixes-v3.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
"Three fixes for the AMD IOMMU driver:
- fix a locking issue around get_user_pages()
- fix two issues with device aliasing and exclusion range handling"
* tag 'iommu-fixes-v3.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: fix enabling exclusion range for an exact device
iommu/amd: Take mmap_sem when calling get_user_pages
iommu/amd: Fix interrupt remapping for aliased devices
* Compile drivers/sh/pm_runtime.c if ARCH_SHMOBILE_MULTI
This resolves a regression introduced in v3.14 by
bf98c1eac1 ("ARM: Rename ARCH_SHMOBILE to ARCH_SHMOBILE_LEGACY").
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=vlOb
-----END PGP SIGNATURE-----
Merge tag 'renesas-sh-drivers-for-v3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas
Pull SH driver fix from Simon Horman:
"Compile drivers/sh/pm_runtime.c if ARCH_SHMOBILE_MULTI
This resolves a regression introduced in v3.14 by commit bf98c1eac1
("ARM: Rename ARCH_SHMOBILE to ARCH_SHMOBILE_LEGACY")"
* tag 'renesas-sh-drivers-for-v3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
drivers: sh: compile drivers/sh/pm_runtime.c if ARCH_SHMOBILE_MULTI
The commit 6c167f582e ("i40e: Refactor and cleanup i40e_open(),
adding i40e_vsi_open()") introduced a new function i40e_vsi_open()
with the regression by a typo. Due to the commit, the wrong error
code would be passed to i40e_open(). Fix this error in
i40e_vsi_open() by turning the macro into a negative value so that
i40e_open() could return the pertinent error code correctly.
Fixes: 6c167f582e ("i40e: Refactor and cleanup i40e_open(), adding i40e_vsi_open()")
Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
As result of deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers
using these two interfaces need to be updated to use the
new pci_enable_msi_range() or pci_enable_msi_exact()
and pci_enable_msix_range() or pci_enable_msix_exact()
interfaces.
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: linux-pci@vger.kernel.org
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This patch fixes a use after free of "dev" in gs_destroy_candev().
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The call to i40e_alloc_vfs needs to be wrapped in CONFIG_PCI_IOV because
the function itself is wrapped in the same conditional compile block.
Change-ID: I663c5f1b85e5cfba0b36da8966f7db1a034f408b
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
The previous removal of the PTP Tx work functionality was
incomplete as noted by Jake Keller. This removal allows
us to rely on the Tx timesync interrupt.
CC: Jacob Keller <jacob.e.keller@intel.com>
Change-ID: Id4faaf275a3688053ebbf07bef08072f9fd11aa9
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
When VFs are assigned to active VMs and we disable SR-IOV out from under them,
bad things happen. Currently, the VM does not crash, but the VFs lose all
resources and have no way to get them back.
Add an additional check for when the user is disabling through sysfs, and add a
comment to clarify why we check twice.
Change-ID: Icad78eef516e4e1e4a87874d59132bc3baa058d4
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Base the queue stats length on the queue stats struct rather than
assuming it is 2 fields. This is in prep for adding data fields
which are configuration dependent.
Change-ID: I937f471f389d2e0f8cec733960c5d9a06b14f3ec
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
