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    aio: fix error handling and rcu usage in "convert the ioctx list to table lookup v3" · da90382c
    Benjamin LaHaise 提交于
    In the patch "aio: convert the ioctx list to table lookup v3", incorrect
    handling in the ioctx_alloc() error path was introduced that lead to an
    ioctx being added via ioctx_add_table() while freed when the ioctx_alloc()
    call returned -EAGAIN due to hitting the aio_max_nr limit.  Fix this by
    only calling ioctx_add_table() as the last step in ioctx_alloc().
    
    Also, several unnecessary rcu_dereference() calls were added that lead to
    RCU warnings where the system was already protected by a spin lock for
    accessing mm->ioctx_table.
    Signed-off-by: NBenjamin LaHaise <bcrl@kvack.org>
    da90382c
aio.c 36.4 KB