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2017-01-03ipmr, ip6mr: add RTNH_F_UNRESOLVED flag to unresolved cache entriesNikolay Aleksandrov
While working with ipmr, we noticed that it is impossible to determine if an entry is actually unresolved or its IIF interface has disappeared (e.g. virtual interface got deleted). These entries look almost identical to user-space when dumping or receiving notifications. So in order to recognize them add a new RTNH_F_UNRESOLVED flag which is set when sending an unresolved cache entry to user-space. Suggested-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-03Merge branch 'for_4.11/net-next/rds_v3' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux Santosh Shilimkar says: ==================== net: RDS updates v2->v3: - Re-based against latest net-next head. - Dropped a user visible change after discussing with David Miller. It needs some more work to fully support old/new tools matrix. - Addressed Dave's comment about bool usage in patch "RDS: IB: track and log active side..." v1->v2: Re-aligned indentation in patch 'RDS: mark few internal functions..." Series consist of: - RDMA transport fixes for map failure, listen sequence, handler panic and composite message notification. - Couple of sparse fixes. - Message logging improvements for bind failure, use once mr semantics and connection remote address, active end point. - Performance improvement for RDMA transport by reducing the post send pressure on the queue and spreading the CQ vectors. - Useful statistics for socket send/recv usage and receive cache usage. - Additional RDS CMSG used by application to track the RDS message stages for certain type of traffic to find out latency spots. Can be enabled/disabled per socket. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-03netfilter: nft_ct: add average bytes per packet supportLiping Zhang
Similar to xt_connbytes, user can match how many average bytes per packet a connection has transferred so far. Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2017-01-03netfilter: nf_tables: add missing descriptions in nft_ct_keysLiping Zhang
We missed to add descriptions about NFT_CT_LABELS, NFT_CT_PKTS and NFT_CT_BYTES, now add it. Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2017-01-03netfilter: merge udp and udplite conntrack helpersFlorian Westphal
udplite was copied from udp, they are virtually 100% identical. This adds udplite tracker to udp instead, removes udplite module, and then makes the udplite tracker builtin. udplite will then simply re-use udp timeout settings. It makes little sense to add separate sysctls, nowadays we have fine-grained timeout policy support via the CT target. old: text data bss dec hex filename 1633 672 0 2305 901 nf_conntrack_proto_udp.o 1756 672 0 2428 97c nf_conntrack_proto_udplite.o 69526 17937 268 87731 156b3 nf_conntrack.ko new: text data bss dec hex filename 2442 1184 0 3626 e2a nf_conntrack_proto_udp.o 68565 17721 268 86554 1521a nf_conntrack.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2017-01-02ACPICA: EFI: Add efihello demo applicationLv Zheng
ACPICA commit 3fcc59f4755607dd066ac8ef869f0aa95e871b84 This patch adds a demo EFI application for stdin/stdout testing. This utility can be used to narrow down root causes of porting issues. Linux is not affected by this patch. Link: https://github.com/acpica/acpica/commit/3fcc59f4 Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-01-02ACPICA: MSVC: Fix MSVC6 build issuesLv Zheng
ACPICA commit fa0680030a2969e1085563da633713e1c321637c Build environment has changed because of new improvements: 1. New files are split 2. New inclusion order This patch updates MSVC project files accordingly. Linux is not affected by this patch. Link: https://github.com/acpica/acpica/commit/fa068003 Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-01-02ACPICA: Linux-specific header: Add support for s390x compilationColin Ian King
ACPICA commit ecac9504e32d3b501c8cb021afb253b4a83fc82f Adds s390x as a 64-bit architecture. Link: https://github.com/acpica/acpica/commit/ecac9504 Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-01-02ACPICA: Hardware: Add sleep register hooksLv Zheng
ACPICA commit ba665dc8e20d9f7730466a659564dd6c557a6cbc In Linux, para-virtualization implmentation hooks critical register writes to prevent real hardware operations. This increases divergences when the sleep registers are cracked in Linux resident ACPICA. This patch tries to introduce a single OSL to reduce the divergences. Link: https://github.com/acpica/acpica/commit/ba665dc8 Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-01-02ACPICA: Debugger: Rename debugger OSL namesLv Zheng
ACPICA commit e76eb8b36ace880e4d475880db1128a206e57b6f This linuxized ACPICA commit is a back port result of the following linux commit: Commit: f8d31489629c125806ce4bf587c0c5c284d6d113 Subject: ACPICA: Debugger: Convert some mechanisms to OSPM specific During the back porting, it is requested by ACPICA to use expected OSL names. Suggested by Bob Moore, Fixed by Lv Zheng. Linux is not affected by this patch. Link: https://github.com/acpica/acpica/commit/e76eb8b3 Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-01-02RDS: add receive message trace used by applicationSantosh Shilimkar
Socket option to tap receive path latency in various stages in nano seconds. It can be enabled on selective sockets using using SO_RDS_MSG_RXPATH_LATENCY socket option. RDS will return the data to application with RDS_CMSG_RXPATH_LATENCY in defined format. Scope is left to add more trace points for future without need of change in the interface. Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
2017-01-02net: mdio: add mdio45_ethtool_ksettings_getPhilippe Reynes
There is a function in mdio for the old ethtool api gset. We add a new function mdio45_ethtool_ksettings_get for the new ethtool api glinksettings. Signed-off-by: Philippe Reynes <tremyfr@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02IB/mlx5: Improve MR checkArtemy Kovalyov
Add "type" field to mlx5_core MKEY struct. Check whether page fault happens on MKEY corresponding to MR. Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02IB/mlx5: Add ODP atomics supportArtemy Kovalyov
Handle ODP atomic operations. When initiator of RDMA atomic operation use ODP MR to provide source data handle pagefault properly. Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02{net,IB}/mlx5: Refactor page fault handlingArtemy Kovalyov
* Update page fault event according to last specification. * Separate code path for page fault EQ, completion EQ and async EQ. * Move page fault handling work queue from mlx5_ib static variable into mlx5_core page fault EQ. * Allocate memory to store ODP event dynamically as the events arrive, since in atomic context - use mempool. * Make mlx5_ib page fault handler run in process context. Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02net/mlx5: Update PAGE_FAULT_RESUME layoutArtemy Kovalyov
Update PAGE_FAULT_RESUME command layout. Three bit fields describing page fault: rdma, rdma_write, req_res gave 8 possible combinations, while only a few were legal. Now they are interpreted as three-bit type field, where former legal combinations turns into corresponding types and unused were added as new types. Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02IB/mlx5: Add MR cache for large UMR regionsArtemy Kovalyov
In this change we turn mlx5_ib_update_mtt() into generic mlx5_ib_update_xlt() to perfrom HCA translation table modifiactions supporting both atomic and process contexts and not limited by number of modified entries. Using this function we increase preallocated MRs up to 16GB. Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02IB/mlx5: Refactor UMR post send formatArtemy Kovalyov
* Update struct mlx5_wqe_umr_ctrl_seg. * Currenlty UMR send_flags aim only certain use cases: enabled/disable cached MR, modifying XLT for ODP. By making flags independent make UMR more flexible allowing arbitrary manipulations. * Since different UMR formats have different entry sizes UMR request should receive exact size of translation table update instead of number of entries. Rename field npages to xlt_size in struct mlx5_umr_wr and update relevant code accordingly. * Add support of length64 bit. Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02net/mlx5: Support new MR featuresArtemy Kovalyov
This patch adds the following items to IFC file. 1. MLX5_MKC_ACCESS_MODE_KSM enum value for creating KSM memory keys. KSM access mode used when indirect MKey associated with fixed memory size entries. 2. null_mkey field that is used to indicate non-present KLM/KSM entries, where it causes the device to generate page fault event when trying to access it. 3. struct mlx5_ifc_cmd_hca_cap_bits capability bits indicating related value/field is supported: * fixed_buffer_size - MLX5_MKC_ACCESS_MODE_KSM * umr_extended_translation_offset - translation_offset_42_16 in UMR ctrl segment * null_mkey - null_mkey in QUERY_SPECIAL_CONTEXTS Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02net/mlx5: Fix offset naming for reserved fields in hca_cap_bitsMax Gurtovoy
Fix offset for reserved fields. Fixes: 7486216b3a0b ("{net,IB}/mlx5: mlx5_ifc updates") Fixes: b4ff3a36d3e4 ("net/mlx5: Use offset based reserved field names in the IFC header file") Fixes: 7d5e14237a55 ("net/mlx5: Update mlx5_ifc hardware features") Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02net: stmmac: remove unused duplicate property snps,axi_allNiklas Cassel
For core revision 3.x Address-Aligned Beats is available in two registers. The DT property snps,aal was created for AAL in the DMA bus register, which is a read/write bit. The DT property snps,axi_all was created for AXI_AAL in the AXI bus mode register, which is a read only bit that reflects the value of AAL in the DMA bus register. Since the value of snps,axi_all is never used in the driver, and since the property was created for a bit that is read only, it should be safe to remove the property. Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-02Merge tag 'iio-fixes-for-4.10a' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First round of IIO fixes for the 4.10 cycle. * 104-quad-8 - Fix selecting wrong register when the index control register is desired. - Fix an off by one error when addressing the input/output control register. - Fix inverted logic on the active high / low control * bmi160 - Sleep for worst case rather than best case amount of time after cmd execution begins. * max44000 - typo fix in illuminance_integration_time_available listing. * st-sensors - Fix channel data passing. This one took a while to get tested on 24bit parts. Definitely one for stable asap as the bug broke quite a few parts. - lis3lv02 needs a data alignment bit set and the scaling was wrong. * ti_am335x - depend on HAS_DMA
2017-01-02usb: gadget: f_fs: Document eventfd effect on descriptor format.Vincent Pelletier
When FUNCTIONFS_EVENTFD flag is set, __ffs_data_got_descs reads a 32bits, little-endian value right after the fixed structure header, and passes it to eventfd_ctx_fdget. Document this. Also, rephrase a comment to be affirmative about the role of string descriptor at index 0. Ref: USB 2.0 spec paragraph "9.6.7 String", and also checked to still be current in USB 3.0 spec paragraph "9.6.9 String". Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2017-01-01qed*: Add support for ndo_set_vf_trustMintz, Yuval
Trusted VFs would be allowed to receive promiscuous and multicast promiscuous data. Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-01qed*: RSS indirection based on queue-handlesMintz, Yuval
A step toward having qede agnostic to the queue configurations in firmware/hardware - let the RSS indirections use queue handles instead of actual queue indices. Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-01qed*: Update to dual-licenseMintz, Yuval
Since the submission of the qedr driver, there's inconsistency in the licensing of the various qed/qede files - some are GPLv2 and some are dual-license. Since qedr requires dual-license and it's dependent on both, we're updating the licensing of all qed/qede source files. Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-01fscrypt: factor out bio specific functionsRichard Weinberger
That way we can get rid of the direct dependency on CONFIG_BLOCK. Fixes: d475a507457b ("ubifs: Add skeleton for fscrypto") Reported-by: Arnd Bergmann <arnd@arndb.de> Reported-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Gstir <david@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2017-01-01Merge branch 'libnvdimm-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull DAX updates from Dan Williams: "The completion of Jan's DAX work for 4.10. As I mentioned in the libnvdimm-for-4.10 pull request, these are some final fixes for the DAX dirty-cacheline-tracking invalidation work that was merged through the -mm, ext4, and xfs trees in -rc1. These patches were prepared prior to the merge window, but we waited for 4.10-rc1 to have a stable merge base after all the prerequisites were merged. Quoting Jan on the overall changes in these patches: "So I'd like all these 6 patches to go for rc2. The first three patches fix invalidation of exceptional DAX entries (a bug which is there for a long time) - without these patches data loss can occur on power failure even though user called fsync(2). The other three patches change locking of DAX faults so that ->iomap_begin() is called in a more relaxed locking context and we are safe to start a transaction there for ext4" These have received a build success notification from the kbuild robot, and pass the latest libnvdimm unit tests. There have not been any -next releases since -rc1, so they have not appeared there" * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: ext4: Simplify DAX fault path dax: Call ->iomap_begin without entry lock during dax fault dax: Finish fault completely when loading holes dax: Avoid page invalidation races and unnecessary radix tree traversals mm: Invalidate DAX radix tree entries only if appropriate ext2: Return BH_New buffers for zeroed blocks
2016-12-31ASoC: Fix binding and probing of auxiliary componentsSylwester Nawrocki
Currently binding of auxiliary devices doesn't work as in soc_bind_aux_dev() function a bound component is not being added to any list and in soc_probe_aux_devices() we are trying to walk the component_dev_list list to probe auxiliary components but at that time this list doesn't contain any auxiliary components since they are being added to the card only in soc_probe_component(). This patch adds a list to the card where are stored bound but not probed auxiliary devices, so that all aux devices can be probed. Fixes: 1a653aa44725 "ASoC: core: replace aux_comp_list to component_dev_list" Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-12-31iio: accel: st_accel: fix LIS3LV02 reading and scalingLinus Walleij
The LIS3LV02 has a special bit that need to be set to get the read values left aligned. Before this patch we get gibberish like this: iio_generic_buffer -a -c10 -n lis3lv02dl_accel (...) 0.000000 -0.010042 -0.642688 19155832931907 0.000000 -0.010042 -0.642688 19155858751073 Which is because we read a raw value for 1g as 64 which is the nominal 1024 for 1g shifted 4 bits to the left by being right-aligned rather than left aligned. Since all other sensors are left aligned, add some code to set the special DAS (data alignment setting) bit to 1 so that the right value is now read like this: iio_generic_buffer -a -c10 -n lis3lv02dl_accel (...) 0.000000 -0.147095 -10.120135 24761614364956 -0.029419 -0.176514 -10.120135 24761631624540 The scaling was weird as well: we have a gain of 1000 for 1g and 3000 for 6g. I don't even remember how I came up with the old values but they are wrong. Fixes: 3acddf74f807 ("iio: st-sensors: add support for lis3lv02d accelerometer") Cc: Lorenzo Bianconi <lorenzo.bianconi@st.com> Cc: Giuseppe Barba <giuseppe.barba@st.com> Cc: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-30vfio-mdev: Make mdev_device private and abstract interfacesAlex Williamson
Abstract access to mdev_device so that we can define which interfaces are public rather than relying on comments in the structure. Cc: Zhenyu Wang <zhenyuw@linux.intel.com> Cc: Zhi Wang <zhi.a.wang@intel.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: Jike Song <jike.song@intel.com> Reviewed by: Kirti Wankhede <kwankhede@nvidia.com>
2016-12-30vfio-mdev: Make mdev_parent privateAlex Williamson
Rather than hoping for good behavior by marking some elements internal, enforce it by making the entire structure private and creating an accessor function for the one useful external field. Cc: Zhenyu Wang <zhenyuw@linux.intel.com> Cc: Zhi Wang <zhi.a.wang@intel.com> Cc: Jike Song <jike.song@intel.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Reviewed by: Kirti Wankhede <kwankhede@nvidia.com>
2016-12-30vfio-mdev: de-polute the namespace, rename parent_device & parent_opsAlex Williamson
Add an mdev_ prefix so we're not poluting the namespace so much. Cc: Zhenyu Wang <zhenyuw@linux.intel.com> Cc: Zhi Wang <zhi.a.wang@intel.com> Cc: Jike Song <jike.song@intel.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Reviewed by: Kirti Wankhede <kwankhede@nvidia.com>
2016-12-30Revert "remoteproc: Merge table_ptr and cached_table pointers"Bjorn Andersson
Following any fw_rsc_vdev entries in the resource table are two variable length arrays, the first one reference vring resources and the second one is the virtio config space. The virtio config space is used by virtio to communicate status and configuration changes and must as such be shared with the remote. The reverted commit incorrectly made any changes to the virtio config space only affect the local copy, in an attempt to allowing memory protection of the shared resource table. This reverts commit cda8529346935fc86f476999ac4fbfe4e17abf11. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2016-12-29net: dev_weight: TX/RX orthogonalityMatthias Tafelmeier
Oftenly, introducing side effects on packet processing on the other half of the stack by adjusting one of TX/RX via sysctl is not desirable. There are cases of demand for asymmetric, orthogonal configurability. This holds true especially for nodes where RPS for RFS usage on top is configured and therefore use the 'old dev_weight'. This is quite a common base configuration setup nowadays, even with NICs of superior processing support (e.g. aRFS). A good example use case are nodes acting as noSQL data bases with a large number of tiny requests and rather fewer but large packets as responses. It's affordable to have large budget and rx dev_weights for the requests. But as a side effect having this large a number on TX processed in one run can overwhelm drivers. This patch therefore introduces an independent configurability via sysctl to userland. Signed-off-by: Matthias Tafelmeier <matthias.tafelmeier@gmx.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-29net/mlx4_core: Fix raw qp flow steering rules under SRIOVJack Morgenstein
Demoting simple flow steering rule priority (for DPDK) was achieved by wrapping FW commands MLX4_QP_FLOW_STEERING_ATTACH/DETACH for the PF as well, and forcing the priority to MLX4_DOMAIN_NIC in the wrapper function for the PF and all VFs. In function mlx4_ib_create_flow(), this change caused the main rule creation for the PF to be wrapped, while it left the associated tunnel steering rule creation unwrapped for the PF. This mismatch caused rule deletion failures in mlx4_ib_destroy_flow() for the PF when the detach wrapper function did not find the associated tunnel-steering rule (since creation of that rule for the PF did not go through the wrapper function). Fix this by setting MLX4_QP_FLOW_STEERING_ATTACH/DETACH to be "native" (so that the PF invocation does not go through the wrapper), and perform the required priority demotion for the PF in the mlx4_ib_create_flow() code path. Fixes: 48564135cba8 ("net/mlx4_core: Demote simple multicast and broadcast flow steering rules") Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-29mm: optimize PageWaiters bit use for unlock_page()Linus Torvalds
In commit 62906027091f ("mm: add PageWaiters indicating tasks are waiting for a page bit") Nick Piggin made our page locking no longer unconditionally touch the hashed page waitqueue, which not only helps performance in general, but is particularly helpful on NUMA machines where the hashed wait queues can bounce around a lot. However, the "clear lock bit atomically and then test the waiters bit" sequence turns out to be much more expensive than it needs to be, because you get a nasty stall when trying to access the same word that just got updated atomically. On architectures where locking is done with LL/SC, this would be trivial to fix with a new primitive that clears one bit and tests another atomically, but that ends up not working on x86, where the only atomic operations that return the result end up being cmpxchg and xadd. The atomic bit operations return the old value of the same bit we changed, not the value of an unrelated bit. On x86, we could put the lock bit in the high bit of the byte, and use "xadd" with that bit (where the overflow ends up not touching other bits), and look at the other bits of the result. However, an even simpler model is to just use a regular atomic "and" to clear the lock bit, and then the sign bit in eflags will indicate the resulting state of the unrelated bit #7. So by moving the PageWaiters bit up to bit #7, we can atomically clear the lock bit and test the waiters bit on x86 too. And architectures with LL/SC (which is all the usual RISC suspects), the particular bit doesn't matter, so they are fine with this approach too. This avoids the extra access to the same atomic word, and thus avoids the costly stall at page unlock time. The only downside is that the interface ends up being a bit odd and specialized: clear a bit in a byte, and test the sign bit. Nick doesn't love the resulting name of the new primitive, but I'd rather make the name be descriptive and very clear about the limitation imposed by trying to work across all relevant architectures than make it be some generic thing that doesn't make the odd semantics explicit. So this introduces the new architecture primitive clear_bit_unlock_is_negative_byte(); and adds the trivial implementation for x86. We have a generic non-optimized fallback (that just does a "clear_bit()"+"test_bit(7)" combination) which can be overridden by any architecture that can do better. According to Nick, Power has the same hickup x86 has, for example, but some other architectures may not even care. All these optimizations mean that my page locking stress-test (which is just executing a lot of small short-lived shell scripts: "make test" in the git source tree) no longer makes our page locking look horribly bad. Before all these optimizations, just the unlock_page() costs were just over 3% of all CPU overhead on "make test". After this, it's down to 0.66%, so just a quarter of the cost it used to be. (The difference on NUMA is bigger, but there this micro-optimization is likely less noticeable, since the big issue on NUMA was not the accesses to 'struct page', but the waitqueue accesses that were already removed by Nick's earlier commit). Acked-by: Nick Piggin <npiggin@gmail.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Bob Peterson <rpeterso@redhat.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Andrew Lutomirski <luto@kernel.org> Cc: Andreas Gruenbacher <agruenba@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-29ipv4: Namespaceify tcp_max_syn_backlog knobHaishuang Yan
Different namespace application might require different maximal number of remembered connection requests. Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-29ipv4: Namespaceify tcp_tw_recycle and tcp_max_tw_buckets knobHaishuang Yan
Different namespace application might require fast recycling TIME-WAIT sockets independently of the host. Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-28Revert "net/mlx5: Add MPCNT register infrastructure"Gal Pressman
This reverts commit 7f503169cabd70c1f13b9279c50eca7dfb9a7d51. Fixes: 7f503169cabd ("net/mlx5: Add MPCNT register infrastructure") Signed-off-by: Gal Pressman <galp@mellanox.com> Reported-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-28sctp: remove return value from sctp_packet_init/configMarcelo Ricardo Leitner
There is no reason to use this cascading. It doesn't add anything. Let's remove it and simplify. Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Various ipvlan fixes from Eric Dumazet and Mahesh Bandewar. The most important is to not assume the packet is RX just because the destination address matches that of the device. Such an assumption causes problems when an interface is put into loopback mode. 2) If we retry when creating a new tc entry (because we dropped the RTNL mutex in order to load a module, for example) we end up with -EAGAIN and then loop trying to replay the request. But we didn't reset some state when looping back to the top like this, and if another thread meanwhile inserted the same tc entry we were trying to, we re-link it creating an enless loop in the tc chain. Fix from Daniel Borkmann. 3) There are two different WRITE bits in the MDIO address register for the stmmac chip, depending upon the chip variant. Due to a bug we could set them both, fix from Hock Leong Kweh. 4) Fix mlx4 bug in XDP_TX handling, from Tariq Toukan. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: net: stmmac: fix incorrect bit set in gmac4 mdio addr register r8169: add support for RTL8168 series add-on card. net: xdp: remove unused bfp_warn_invalid_xdp_buffer() openvswitch: upcall: Fix vlan handling. ipv4: Namespaceify tcp_tw_reuse knob net: korina: Fix NAPI versus resources freeing net, sched: fix soft lockup in tc_classify net/mlx4_en: Fix user prio field in XDP forward tipc: don't send FIN message from connectionless socket ipvlan: fix multicast processing ipvlan: fix various issues in ipvlan_process_multicast()
2016-12-27dt-bindings: mfd: Remove TPS65217 interruptsMilo Kim
Interrupt numbers are from the datasheet, so no need to keep them in the ABI. Use the number in the DT file. Signed-off-by: Milo Kim <woogyom.kim@gmail.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2016-12-27net: xdp: remove unused bfp_warn_invalid_xdp_buffer()Jason Wang
After commit 73b62bd085f4737679ea9afc7867fa5f99ba7d1b ("virtio-net: remove the warning before XDP linearizing"), there's no users for bpf_warn_invalid_xdp_buffer(), so remove it. This is a revert for commit f23bc46c30ca5ef58b8549434899fcbac41b2cfc. Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-27ipv4: Namespaceify tcp_tw_reuse knobHaishuang Yan
Different namespaces might have different requirements to reuse TIME-WAIT sockets for new connections. This might be required in cases where different namespace applications are in place which require TIME_WAIT socket connections to be reduced independently of the host. Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-26mm: Invalidate DAX radix tree entries only if appropriateJan Kara
Currently invalidate_inode_pages2_range() and invalidate_mapping_pages() just delete all exceptional radix tree entries they find. For DAX this is not desirable as we track cache dirtiness in these entries and when they are evicted, we may not flush caches although it is necessary. This can for example manifest when we write to the same block both via mmap and via write(2) (to different offsets) and fsync(2) then does not properly flush CPU caches when modification via write(2) was the last one. Create appropriate DAX functions to handle invalidation of DAX entries for invalidate_inode_pages2_range() and invalidate_mapping_pages() and wire them up into the corresponding mm functions. Acked-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2016-12-26Merge tag 'v4.10-rc1' into patchworkMauro Carvalho Chehab
Linux 4.10-rc1 * tag 'v4.10-rc1': (11427 commits) Linux 4.10-rc1 powerpc: Fix build warning on 32-bit PPC avoid spurious "may be used uninitialized" warning mm: add PageWaiters indicating tasks are waiting for a page bit mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked ktime: Get rid of ktime_equal() ktime: Cleanup ktime_set() usage ktime: Get rid of the union clocksource: Use a plain u64 instead of cycle_t irqchip/armada-xp: Consolidate hotplug state space irqchip/gic: Consolidate hotplug state space coresight/etm3/4x: Consolidate hotplug state space cpu/hotplug: Cleanup state names cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions staging/lustre/libcfs: Convert to hotplug state machine scsi/bnx2i: Convert to hotplug state machine scsi/bnx2fc: Convert to hotplug state machine cpu/hotplug: Prevent overwriting of callbacks x86/msr: Remove bogus cleanup from the error path bus: arm-ccn: Prevent hotplug callback leak ...
2016-12-26Merge branch 'patchwork' into v4l_for_linusMauro Carvalho Chehab
* patchwork: [media] s5k4ecgx: select CRC32 helper [media] dvb: avoid warning in dvb_net [media] v4l: tvp5150: Don't override output pinmuxing at stream on/off time [media] v4l: tvp5150: Fix comment regarding output pin muxing [media] v4l: tvp5150: Reset device at probe time, not in get/set format handlers [media] pctv452e: move buffer to heap, no mutex [media] media/cobalt: use pci_irq_allocate_vectors [media] cec: fix race between configuring and unconfiguring [media] cec: move cec_report_phys_addr into cec_config_thread_func [media] cec: replace cec_report_features by cec_fill_msg_report_features [media] cec: update log_addr[] before finishing configuration [media] cec: CEC_MSG_GIVE_FEATURES should abort for CEC version < 2 [media] cec: when canceling a message, don't overwrite old status info [media] cec: fix report_current_latency [media] smiapp: Make suspend and resume functions __maybe_unused [media] smiapp: Implement power-on and power-off sequences without runtime PM
2016-12-25Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer type cleanups from Thomas Gleixner: "This series does a tree wide cleanup of types related to timers/timekeeping. - Get rid of cycles_t and use a plain u64. The type is not really helpful and caused more confusion than clarity - Get rid of the ktime union. The union has become useless as we use the scalar nanoseconds storage unconditionally now. The 32bit timespec alike storage got removed due to the Y2038 limitations some time ago. That leaves the odd union access around for no reason. Clean it up. Both changes have been done with coccinelle and a small amount of manual mopping up" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: ktime: Get rid of ktime_equal() ktime: Cleanup ktime_set() usage ktime: Get rid of the union clocksource: Use a plain u64 instead of cycle_t
2016-12-25Merge branch 'smp-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull SMP hotplug notifier removal from Thomas Gleixner: "This is the final cleanup of the hotplug notifier infrastructure. The series has been reintgrated in the last two days because there came a new driver using the old infrastructure via the SCSI tree. Summary: - convert the last leftover drivers utilizing notifiers - fixup for a completely broken hotplug user - prevent setup of already used states - removal of the notifiers - treewide cleanup of hotplug state names - consolidation of state space There is a sphinx based documentation pending, but that needs review from the documentation folks" * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/armada-xp: Consolidate hotplug state space irqchip/gic: Consolidate hotplug state space coresight/etm3/4x: Consolidate hotplug state space cpu/hotplug: Cleanup state names cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions staging/lustre/libcfs: Convert to hotplug state machine scsi/bnx2i: Convert to hotplug state machine scsi/bnx2fc: Convert to hotplug state machine cpu/hotplug: Prevent overwriting of callbacks x86/msr: Remove bogus cleanup from the error path bus: arm-ccn: Prevent hotplug callback leak perf/x86/intel/cstate: Prevent hotplug callback leak ARM/imx/mmcd: Fix broken cpu hotplug handling scsi: qedi: Convert to hotplug state machine