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On Wed, Sep 15, 2004 at 02:45:23PM -0700, Andrew Morton wrote: > Zwane Mwaikambo <zwane@fsmlabs.com> wrote: > > > > William spotted this stray bit, LOCK_SECTION isn't used anymore on x86_64. > > btw, Ingo and I were scratching heads over an x86_64 oops in curent -linus > trees. > > If you enable profiling and frame pointers, profile_pc() goes splat > dereferencing the `regs' argument when it decides that the pc refers to a > lock section. Ingo said `regs' had a value of 0x2, iirc. Consider this a > bug report ;) Known problem. Interrupts don't save regs->rbp, but the new profile_pc that was introduced recently uses it. One quick fix is to just use SAVE_ALL in the interrupt entry code, but I don't like this because it will affect interrupt latency. The real fix is to fix profile_pc to not reference it. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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