Messages in this thread | | | Date | Wed, 09 Aug 2006 11:58:26 +1000 | From | Nick Piggin <> | Subject | Re: [RFC] NUMA futex hashing |
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Ulrich Drepper wrote:
>> Of course we would need a new syscall, and to change glibc to be able to >> actually use this new private_futex syscall. > > > No, why? The kernel already does recognize private mutexes. It just > checks whether the pages used to store it are private or mapped. This > requires some interaction with the memory subsystem but as long as no > crashes happen the data can change underneath. It's the program's > fault if it does.
Because that requires taking mmap_sem. Avoiding that is the whole purpose, isn't it?
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