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authorBruce Ashfield <bruce.ashfield@gmail.com>2019-10-08 09:24:33 -0400
committerBruce Ashfield <bruce.ashfield@gmail.com>2019-10-08 10:16:33 -0400
commit86ac40fcf8ca1c1ec138ee38c3b2c1e393a90bc9 (patch)
treee4767119ec039d0f5a9bb3aa384f07ca22cb7197 /cfg/vmware-guest.scc
parented075e231ab9984635b7219682a050e6016501b3 (diff)
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signal/ptrace: fix cgroup2/freezer long runtimesHEADmaster
1/1 [ Author: Bruce Ashfield Email: bruce.ashfield@gmail.com Subject: signal/ptrace: fix cgroup2/freezer long runtimes Date: Tue, 8 Oct 2019 13:15:46 +0000 As reported in the thread: https://lkml.org/lkml/2019/10/1/789, in kernels with commit 76f969e8948d82 [cgroup: cgroup v2 freezer], we were seeing much longer runtime in strace/ptrace tests (4 minutes versus 4 seconds). The issue only manifests if CONFIG_PREEMPT is enabled, which is in all of the default configurations. As sugggested in the thread, the movement of preempt_enable_no_resched() until after the cgroup is frozen returns the behaviour to pre-5.2 runtimes. Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> ] Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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