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Ar Mer, 2006-09-20 am 11:39 +0200, ysgrifennodd Helge Hafting: > Yes, 5 bytes is not an atomic write except on 64-bit. So a race is possible. Untrue as well. Pentium and later have CMPXCHG8. > How about this workaround: > 1. Overwrite the start of the function with a hlt, which is atomic. > 2. Write that 5-byte jump after the hlt. > 3. Overwrite the hlt with nop so things will work > 4. interrupt any cpus that got stuck on the hlt - or just wait for the > timer. CPU errata time again. You have to synchronize. Alan - 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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