• A
    acct: new lifetime rules · b8f00e6b
    Al Viro 提交于
    Do not reuse bsd_acct_struct after closing the damn thing.
    Structure lifetime is controlled by refcount now.  We also
    have a mutex in there, held over closing and writing (the
    file is O_APPEND, so we are not losing any concurrency).
    
    As the result, we do not need to bother with get_file()/fput()
    on log write anymore.  Moreover, do_acct_process() only needs
    acct itself; file and pidns are picked from it.
    
    Killed instances are distinguished by having NULL ->ns.
    Refcount is protected by acct_lock; anybody taking the
    mutex needs to grab a reference first.
    
    The things will get a lot simpler in the next commits - this
    is just the minimal chunk switching to the new lifetime rules.
    Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
    b8f00e6b
acct.c 16.6 KB