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* selftest/mpmc_ring: lower test count for perf testingjd/ring_testingJason A. Donenfeld2018-06-181-1/+1
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* mpmc_ptr_ring: disable preemptionJason A. Donenfeld2018-06-181-3/+18
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* mpmc_ptr_ring: nitsJason A. Donenfeld2018-06-181-7/+4
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* mpmc_ptr_ring: move atomic_read outside loopThomas Gschwantner2018-06-181-2/+2
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* selftest/mpmc_ring: use rwsem instead of multiple completionsJason A. Donenfeld2018-06-181-10/+10
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* selftest/mpmc_ring: switch back to our own ringJason A. Donenfeld2018-06-181-9/+8
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* selftest/mpmc_ring: use completion and switch to ptr_ringJason A. Donenfeld2018-06-181-17/+23
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* mpmc_ptr_ring: Fix a wordJonathan Neuschäfer2018-06-181-1/+1
| | | | Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
* selftest/mpmc_ring: use kthreadsJason A. Donenfeld2018-06-181-40/+26
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* selftest/mpmc_ring: don't starve other queuesJason A. Donenfeld2018-06-181-21/+28
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* selftest/mpmc_ring: round-robin CPUsJason A. Donenfeld2018-06-181-2/+5
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* selftest/mpmc_ring: small restructuringJason A. Donenfeld2018-06-181-18/+17
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* Test commitThomas Gschwantner2018-06-184-17/+56
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* selftest/mpmc_ring: use int64_t for countersThomas Gschwantner2018-06-181-6/+6
| | | | Previously used long would overflow on 32-bit machines.
* selftest/mpmc_ring: Add more __init/__initdata annotationsJonathan Neuschäfer2018-06-181-3/+3
| | | | | The main function, mpmc_ring_selftest, is already marked with __init, but the callback functions and the ring pointer were not.
* selftest/mpmc_ring: Remove const qualifier from mpmc_ptr_ring_produce argumentJonathan Neuschäfer2018-06-181-1/+1
| | | | | | | | | | | mpmc_ptr_ring_produce takes a void*. This fixes the following warning: net/wireguard/selftest/mpmc_ring.h: In function ‘producer_function’: net/wireguard/selftest/mpmc_ring.h:43:38: warning: passing argument 2 of ‘mpmc_ptr_ring_produce’ disc] while (mpmc_ptr_ring_produce(ring, (const void *) count)) ^
* mpmc_ptr_ring: Include all necessary headersJonathan Neuschäfer2018-06-181-0/+11
| | | | | | | | | | | | | | | | | | | | mpmc_ptr_ring.h should include the headers that it needs explicitly. This commit adds the following: - <asm/barrier.h>: smp_rmb, smp_wmb, smp_mb__before_atomic - <linux/atomic.h>: atomic_t, atomic_read, atomic_set, atomic_cmpxchg, atomic_inc - <linux/cache.h>: ____cacheline_aligned_in_smp - <linux/compiler.h>: READ_ONCE, WRITE_ONCE - <linux/errno.h>: ENOMEM - <linux/log2.h>: is_power_of_2 - <linux/processor.h>: cpu_relax - <linux/slab.h>: kcalloc, kfree - <linux/stddef.h>: NULL I'm not sure if all of them are really needed because I wasn't about to provoke a compile error due to the missing includes. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
* mpmc_ptr_ring: Fix some style detailsJonathan Neuschäfer2018-06-182-1/+2
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* mpmc_ptr_ring: add selftestThomas Gschwantner2018-06-184-1/+125
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* mpmc_ptr_ring: calculate mask once and store itThomas Gschwantner2018-06-181-3/+5
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* mpmc_ptr_ring: use unsigned int instead of size_tThomas Gschwantner2018-06-181-10/+10
| | | | | | | | For producers/consumers we use atomic_t which is really int, so size_t could either be too large, wasting memory, or too small (unlikely). For size, we also want to be using unsigned int, since the mask that we derive from it is ANDed with producer/consumer.
* mpmc_ptr_ring: add include guardThomas Gschwantner2018-06-181-0/+6
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* mpmc_ptr_ring: Switch to smp_[rw]mb()Jonathan Neuschäfer2018-06-181-8/+8
| | | | | | | | | | | | | | From https://www.kernel.org/doc/Documentation/memory-barriers.txt: > SMP memory barriers are reduced to compiler barriers on uniprocessor > compiled systems because it is assumed that a CPU will appear to be > self-consistent, and will order overlapping accesses correctly with > respect to itself. Since we only order CPU memory accesses with the memory barriers in mpmc_ptr_ring.h, smp_[rw]mb() should be sufficient. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
* messages: Ensure that there are more queue slots than CPUsJonathan Neuschäfer2018-06-182-1/+9
| | | | | | | I'm not completely sure about this. It also doesn't fix all the errors: sometimes the test suite reports that it fails to send packets.
* mpmc_ptr_ring: Place producer_head and producer_tail in the same cachelineJonathan Neuschäfer2018-06-181-5/+3
| | | | | They are updated together, so it doesn't make much sense to keep them separate in the cache.
* mpmc_ptr_ring: Use atomic_t instead of atomic_long_tJonathan Neuschäfer2018-06-181-20/+20
| | | | The index range doesn't get large enough to warrant 64-bit indices.
* mpmc_ptr_ring: Eliminate false sharing in struct mpmc_ptr_ringJonathan Neuschäfer2018-06-181-3/+3
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* mpmc_ptr_ring: Reduce the memory barrier usageJonathan Neuschäfer2018-06-181-26/+22
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* mpmc_ptr_ring: Fix the remaining crashJonathan Neuschäfer2018-06-181-2/+2
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* [WIP] Implement a lock-free MPMC ring bufferJonathan Neuschäfer2018-06-186-13/+225
| | | | | | | | TODO: actually use the right memory barriers in the right places TODO: eliminate false sharing between mpmc_ptr_ring members TODO: reconsider atomic_long_t vs. atomic_t, vs. the type of size in _init() TODO: sprinkle likely/unlikely on some branches FIXME: it still crashes
* qemu: bump default kernelJason A. Donenfeld2018-06-171-1/+1
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* wg-quick: android: don't forget to free compiled regexesJason A. Donenfeld2018-06-171-5/+6
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* wg-quick: android: disable roaming to v6 networks when v4 is specifiedJason A. Donenfeld2018-06-171-1/+54
| | | | This works around an unfortunate bug in 464XLAT transitions.
* dns-hatchet: apply resolv.conf's selinux context to new resolv.confJason A. Donenfeld2018-06-171-0/+2
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* simd: no need to restore fpu state when no preemptionJason A. Donenfeld2018-06-171-0/+2
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* simd: encapsulate fpu amortization into nice functionsJason A. Donenfeld2018-06-177-71/+83
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* queueing: re-enable preemption periodically to lower latencyJason A. Donenfeld2018-06-162-0/+18
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* queueing: remove useless spinlocks on scJason A. Donenfeld2018-06-163-5/+1
| | | | Since these are the only consumers, there's no need for locking.
* tools: getentropy requires 10.12Jason A. Donenfeld2018-06-141-1/+7
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* chacha20poly1305: use slow crypto on -rt kernels on arm tooJason A. Donenfeld2018-06-141-1/+1
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* version: bump snapshot0.0.20180613Jason A. Donenfeld2018-06-132-2/+2
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* chacha20poly1305: use slow crypto on -rt kernelsJason A. Donenfeld2018-06-131-1/+1
| | | | | | | | | | | | | | In rt kernels, spinlocks call schedule(), which means preemption can't be disabled. The FPU disables preemption. Hence, we can either restructure things to move the calls to kernel_fpu_begin/end to be really close to the actual crypto routines, or we can do the slower lazier solution of just not using the FPU at all on -rt kernels. This patch goes with the latter lazy solution. The reason why we don't place the calls to kernel_fpu_begin/end close to the crypto routines in the first place is that they're very expensive, as it usually involves a call to XSAVE. So on sane kernels, we benefit from only having to call it once.
* tools: support getentropy(3)Jason A. Donenfeld2018-06-081-0/+11
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* tools: encoding: add missing static array constraintsJason A. Donenfeld2018-06-063-5/+5
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* wg-quick: android: change name of intentJason A. Donenfeld2018-06-041-1/+1
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* chacha20: add missing include to headerJason A. Donenfeld2018-06-021-0/+1
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* wg-quick: android: delay setting users until endJason A. Donenfeld2018-05-311-1/+6
| | | | | | | `ndc users add` eventually invokes SOCK_DESTROY on user sockets, causing them to reconnect. By delaying this until after routes are set, we ensure that the sockets reconnect using the tunnel, rather than the old route.
* version: bump snapshot0.0.20180531Jason A. Donenfeld2018-05-312-2/+2
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* qemu: bump default versionJason A. Donenfeld2018-05-311-1/+1
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* tools: constanter time encodingJason A. Donenfeld2018-05-312-22/+28
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