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Date: Thu, 13 Jan 2022 03:09:55 +0000
From: "zhaohang (F)" <>
To: "" <>
CC: "zhangwentao (M)" <>
Subject: What's the purpose of the __vm_lock?


I'm a little confused about the usefulness of __vm_lock. It seems like that __vm_lock was originally cited to prevent the data race condition between pthread_barrier_wait and virtual memory changing, but it can not ensure that the virtual memory of the barrier will not be changed before pthread_barrier_wait. So, what is the meaning that introduce the __vm_lock to prevent the data race?

Thank you.

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