Messages in this thread | | | From | (Eric W. Biederman) | Date | Mon, 02 Sep 2019 23:50:32 -0500 | Subject | [PATCH 0/3] task: Making tasks on the runqueue rcu protected |
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I have split this work into 3 simple patches, so the code is straight forward to review and so that if any mistakes slip in it is easy to bisect them. In the process of review what it takes to remove task_rcu_dereference I found yet another user of tasks on the runqueue in rcu context; the rcuwait_event code. That code only needs it now unnecessary limits removed.
I have lightly tested it, and read through everything I can think of that might be an issue.
Peter would this be a good fit for your scheduler tree? If not I will toss it onto a branch someplace and send it to Linus when the merge window opens.
Oleg do you have any issues with this code?
Eric W. Biederman (3): task: Add a count of task rcu users task: RCU protect tasks on the runqueue task: Clean house now that tasks on the runqueue are rcu protected
include/linux/rcuwait.h | 20 +++---------- include/linux/sched.h | 5 +++- include/linux/sched/task.h | 2 +- kernel/exit.c | 74 ++++------------------------------------------ kernel/fork.c | 8 +++-- kernel/sched/core.c | 7 +++-- kernel/sched/fair.c | 2 +- kernel/sched/membarrier.c | 4 +-- 8 files changed, 27 insertions(+), 95 deletions(-)
Eric
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