Messages in this thread |  | | From | "Manfred Spraul" <> | Subject | Re: Deadlock on the mm->mmap_sem | Date | Wed, 19 Sep 2001 20:19:09 +0200 |
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> if we go generic then I strongly recommend my version of the generic > semaphores is _much_ faster (and cleaner) than this one (it even allows > more than 2^31 concurrent readers on 64 bit archs ;). > Andrea,
implementing recursive semaphores is trivial, but do you have any idea how to fix the latency problem? Multithreaded, iobound apps that use mmap are unusable with unfair semaphores.
My test app hangs for minutes within mprotect().
-- Manfred
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