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    SubjectRe: [v3 PATCH] mm: introduce arg_lock to protect arg_start|end and env_start|end in mm_struct
    On Tue 10-04-18 05:52:54, Yang Shi wrote:
    [...]
    > So, introduce a new spinlock in mm_struct to protect the concurrent
    > access to arg_start|end, env_start|end and others except start_brk and
    > brk, which are still protected by mmap_sem to avoid concurrent access
    > from do_brk().

    Is there any fundamental problem with brk using the same lock?
    --
    Michal Hocko
    SUSE Labs

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