Messages in this thread | | | Date | Mon, 20 Feb 2012 21:20:38 +1300 | From | Michael Cree <> | Subject | alpha: futex regression bisected |
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I have noticed some user space problems (pulseaudio crashes in pthread code, glibc/nptl test suite failures, java compiler freezes on SMP alpha systems) that arise when using a 2.6.39 or later kernel on Alpha. Bisecting between 2.6.38 and 2.6.39 (using glibc/nptl test suite as criterion for good/bad kernel) eventually leads to:
8d7718aa082aaf30a0b4989e1f04858952f941bc is the first bad commit commit 8d7718aa082aaf30a0b4989e1f04858952f941bc Author: Michel Lespinasse <walken@google.com> Date: Thu Mar 10 18:50:58 2011 -0800
futex: Sanitize futex ops argument types
Change futex_atomic_op_inuser and futex_atomic_cmpxchg_inatomic prototypes to use u32 types for the futex as this is the data type the futex core code uses all over the place.
Looking at the commit I see there is a change of the uaddr argument in the Alpha architecture specific code for futexes from int to u32, but I don't see why this should cause a problem.
I am hoping someone better than I at Alpha assembly (Richard?, Ivan?) might be able to look at the commit and propose a fix!
Cheers Michael.
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