aio: fix error handling and rcu usage in "convert the ioctx list to table lookup v3"

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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: Benjamin LaHaise <bcrl@kvack.org>

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This commit is contained in:

Benjamin LaHaise 2013-08-05 13:21:43 -04:00

parent 6878ea72a5

commit da90382c2e

1 changed files with 9 additions and 8 deletions

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fs/aio.c

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