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From: "zhaohang (F)" <zhaohang14@huawei.com>
To: "musl@lists.openwall.com" <musl@lists.openwall.com>
Cc: "zhangwentao (M)" <zhangwentao234@huawei.com>
Subject: [musl] What's the purpose of the __vm_lock?
Date: Thu, 13 Jan 2022 03:09:55 +0000	[thread overview]
Message-ID: <e457d3dcb3b84e39ae7e9761216d3783@huawei.com> (raw)

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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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             reply	other threads:[~2022-01-13  3:10 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-13  3:09 zhaohang (F) [this message]
2022-01-13  3:43 ` Rich Felker

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