Messages in this thread | | | Subject | Re: introducing __GFP_PANIC | From | Pekka Enberg <> | Date | Mon, 04 May 2009 12:56:09 +0300 |
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On Mon, 2009-05-04 at 12:49 +0400, Cyrill Gorcunov wrote: > | __GFP_PANIC is an annotation saying that it's okay for a particular > | call-site not to check for NULL because we never expect to run out of > | memory at that point. But we don't really need to panic() for all the > | possible *errors*, just for the out-of-memory case. > | > | Pekka > | > > Which means, __GFP_PANIC will not grant the guarantee to a caller > that he will not get NULL deref even with __GFP_PANIC specified?
Yes, __GFP_PANIC will guarantee that you never return NULL for _out-of-memory_ but makes no guarantees what happens if you pass bogus size or order.
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