Messages in this thread | | | Subject | Process-shared futexes on hugepages puts the kernel in an infinite loop in 2.6.32.11; is this fixed now? | From | r6144 <> | Date | Fri, 16 Apr 2010 23:45:22 +0800 |
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Hello all,
I'm having an annoying kernel bug regarding huge pages in Fedora 12:
https://bugzilla.redhat.com/show_bug.cgi?id=552257
Basically I want to use huge pages in a multithreaded number crunching program, which happens to use process-shared semaphores (because fftw does it). The futex for the semaphore ends up lying on a huge page, and I then get an endless loop in get_futex_key(), apparently because the anonymous huge page containing the futex does not have a page->mapping. A test case is provided in the above link.
I reported the bug to Fedora bugzilla months ago, but haven't received any feedback yet. The Fedora kernel is based on 2.6.32.11, and a cursory glance at the 2.6.34-rc3 source does not yield any relevant change.
So, could anyone tell me if the current mainline kernel might act better in this respect, before I get around to compiling it?
Thank you very much.
Please CC me as I'm not subscribed.
r6144
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