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Changes ------- * Reduce open-coded use of ratelimit_state structure fields. * Convert the ->missed field to atomic_t. * Count misses that are due to lock contention. * Eliminate jiffies=0 special case. * Reduce ___ratelimit() false-positive rate limiting (Petr Mladek). * Allow zero ->burst to hard-disable rate limiting. * Optimize away atomic operations when a miss is guaranteed. * Warn if ->interval or ->burst are negative (Petr Mladek). * Simplify the resulting code. A smoke test and stress test have been created, but they are not yet ready for mainline. With luck, we will offer them for the v6.17 merge window. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEbK7UrM+RBIrCoViJnr8S83LZ+4wFAmgzWdgTHHBhdWxtY2tA a2VybmVsLm9yZwAKCRCevxLzctn7jBnZD/wKD+5f8qwEuaib901yLb/s4ZkS3Aly mcPLAcTSFc7jp3c188V2qPAAgobQW+NnOLZ/TuB34tvS/Ngm/Yo1EPiHD2AXPzfY FPlgmjvOQQQo9dfA1PNOegh/aKYhMJrho85cilcM1TojuSSVbo1lG1FbuvqMJ9Ub jPHRB6KaFDnhwJkWHJ4Fjl1z1TQcyxjrBoswEcMCKapNqrm6IiXLvw03Nme3wa7F tr30xue5GV/FyHMa14g/8GSpZ88Lr5VGsOoC0wz2KhfMsZcFRkmslgm8mxHawwXj MbQaW7Th+fD7H0pC/lbHIiKaXvizYbQCPXr4qf5gfqNf4R/BHE1QdSTmP45kjEXO CmZEwwVx8cVdyoY9N9udDhNZly/U83G3F1n38jdM2SCPjn3F8BAanZRwakLEvmCC XUQ0bvzQvJl0LM5ktyaaMZdWf3p6uah7otryCPdsA5V7BFgyx5ZHniXY6v1JgfhX 2nmYRO3vEoQ39Z+vPtu7DvS64oe/aYgkSIoG68rKhSb4S+nIdIZ8zwB1af4Nkk8e YZwlwjIRw+RCu/QET4GXLE1tHQ031kWR/xG8nDnNGE3XCjnfRArAcdMZNDlc3U5k GT1g8zOJR2jmlEvWUZwpmclc1yeHXTK1P9nOHmzhxw26eiXmY353PZcND9Ktnt/a RH550D0vUqFM7A== =ivk+ -----END PGP SIGNATURE----- Merge tag 'ratelimit.2025.05.25a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull rate-limit updates from Paul McKenney: "lib/ratelimit: Reduce false-positive and silent misses: - Reduce open-coded use of ratelimit_state structure fields. - Convert the ->missed field to atomic_t. - Count misses that are due to lock contention. - Eliminate jiffies=0 special case. - Reduce ___ratelimit() false-positive rate limiting (Petr Mladek). - Allow zero ->burst to hard-disable rate limiting. - Optimize away atomic operations when a miss is guaranteed. - Warn if ->interval or ->burst are negative (Petr Mladek). - Simplify the resulting code. A smoke test and stress test have been created, but they are not yet ready for mainline. With luck, we will offer them for the v6.17 merge window" * tag 'ratelimit.2025.05.25a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: ratelimit: Drop redundant accesses to burst ratelimit: Use nolock_ret restructuring to collapse common case code ratelimit: Use nolock_ret label to collapse lock-failure code ratelimit: Use nolock_ret label to save a couple of lines of code ratelimit: Simplify common-case exit path ratelimit: Warn if ->interval or ->burst are negative ratelimit: Avoid atomic decrement under lock if already rate-limited ratelimit: Avoid atomic decrement if already rate-limited ratelimit: Don't flush misses counter if RATELIMIT_MSG_ON_RELEASE ratelimit: Force re-initialization when rate-limiting re-enabled ratelimit: Allow zero ->burst to disable ratelimiting ratelimit: Reduce ___ratelimit() false-positive rate limiting ratelimit: Avoid jiffies=0 special case ratelimit: Count misses due to lock contention ratelimit: Convert the ->missed field to atomic_t drm/amd/pm: Avoid open-coded use of ratelimit_state structure's internals drm/i915: Avoid open-coded use of ratelimit_state structure's ->missed field random: Avoid open-coded use of ratelimit_state structure's ->missed field ratelimit: Create functions to handle ratelimit_state internals
1722 lines
53 KiB
1722 lines
53 KiB