Messages in this thread | | | Date | Wed, 10 Aug 2005 16:27:31 +0100 (BST) | From | Hugh Dickins <> | Subject | Re: [openib-general] Re: [PATCH repost] PROT_DONTCOPY: ifiniband uverbs fork support |
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On Wed, 10 Aug 2005, Gleb Natapov wrote: > On Wed, Aug 10, 2005 at 02:22:40PM +0100, Hugh Dickins wrote: > > > > Your stack example is a good one: if we end up setting VM_DONTCOPY on > > the user stack, then I don't think fork's child will get very far without > > hitting a SIGSEGV. > > I know, but I prefer child SIGSEGV than silent data corruption.
Most people will share your preference, but neither is satisfactory.
> In most cases child will exec immediately after fork so no problem > in this case.
In most(?) cases it won't even be able to exec before the SIGSEGV.
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