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authorTobias Klauser <tklauser@distanz.ch>2016-04-29 15:48:34 +0200
committerTobias Klauser <tklauser@distanz.ch>2016-04-29 16:15:52 +0200
commit8a02953bd666fb4b6437cfe272c321b0b6023848 (patch)
treed890aa95a327350e68e02998ef9ea9e843f8d1a1 /.travis.yml
parent46952c9e60d7e116a7072a13c6590130eacbd423 (diff)
doc: Document Travis CI Coverity integration
Update README.devel with information about the Travis CI Coverity integration. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-09-19 10:52:23 +0000
2e01aa ("sched/fair: Fix overly small weight for interactive group entities") calc_tg_weight() doesn't compute the right value as expected by effective_load(). The difference is in the 'correction' term. In order to ensure \Sum rw_j >= rw_i we cannot use tg->load_avg directly, since that might be lagging a correction on the current cfs_rq->avg.load_avg value. Therefore we use tg->load_avg - cfs_rq->tg_load_avg_contrib + cfs_rq->avg.load_avg. Now, per the referenced commit, calc_tg_weight() doesn't use cfs_rq->avg.load_avg, as is later used in @w, but uses cfs_rq->load.weight instead. So stop using calc_tg_weight() and do it explicitly. The effects of this bug are wake_affine() making randomly poor choices in cgroup-intense workloads. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: <stable@vger.kernel.org> # v4.3+ Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: fde7d22e01aa ("sched/fair: Fix overly small weight for interactive group entities") Signed-off-by: Ingo Molnar <mingo@kernel.org>
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