| Date | Tue, 17 Jan 2023 16:57:40 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH 39/41] kernel/fork: throttle call_rcu() calls in vm_area_free |
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On Mon 09-01-23 12:53:34, Suren Baghdasaryan wrote: > call_rcu() can take a long time when callback offloading is enabled. > Its use in the vm_area_free can cause regressions in the exit path when > multiple VMAs are being freed.
What kind of regressions.
> To minimize that impact, place VMAs into > a list and free them in groups using one call_rcu() call per group.
Please add some data to justify this additional complexity. -- Michal Hocko SUSE Labs
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