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SubjectRe: semantics of rhashtable and sysvipc
On Wed, 23 May 2018, Linus Torvalds wrote:

>So I'm perfectly fine with getting rid of 'tables_initialized'. But no, not
>with a BUG_ON().
>
>If you cannot guarantee that the allocation works (using __GFP_NOFAIL is
>ok, for example - but it only works with small allocations), then you need
>to handle the allocation failure.

Note that even if the allocation was guaranteed, there are still param validations
and rhashtable_init() can return -EINVAL.

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