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* [musl] What's the purpose of the __vm_lock?
@ 2022-01-13  3:09 zhaohang (F)
  2022-01-13  3:43 ` Rich Felker
  0 siblings, 1 reply; 2+ messages in thread
From: zhaohang (F) @ 2022-01-13  3:09 UTC (permalink / raw)
  To: musl; +Cc: zhangwentao (M)

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Hello,

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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2022-01-13  3:09 [musl] What's the purpose of the __vm_lock? zhaohang (F)
2022-01-13  3:43 ` Rich Felker

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