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    dentry_kill(): don't try to remove from shrink list · 41edf278
    Al Viro 提交于
    If the victim in on the shrink list, don't remove it from there.
    If shrink_dentry_list() manages to remove it from the list before
    we are done - fine, we'll just free it as usual.  If not - mark
    it with new flag (DCACHE_MAY_FREE) and leave it there.
    
    Eventually, shrink_dentry_list() will get to it, remove the sucker
    from shrink list and call dentry_kill(dentry, 0).  Which is where
    we'll deal with freeing.
    
    Since now dentry_kill(dentry, 0) may happen after or during
    dentry_kill(dentry, 1), we need to recognize that (by seeing
    DCACHE_DENTRY_KILLED already set), unlock everything
    and either free the sucker (in case DCACHE_MAY_FREE has been
    set) or leave it for ongoing dentry_kill(dentry, 1) to deal with.
    Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
    41edf278
dcache.c 87.7 KB