On Wed, Jan 05, 2011 at 11:47:25AM -0800, Stephen Boyd wrote: > Poisoning __init marked memory can be useful when tracking down > obscure memory corruption bugs. When a pointer is 0xCCCCCCCC in an That's a bad idea for a value. With a 3GB page offset and 256MB or more memory, accesses to such an address will always succeed. There's two things to be considered when selecting a possible poison value: 1. what value is guaranteed to provoke an undefined instruction exception? 2. what value when used as an address and dereferenced is mostly always going to abort? 1 for ARM mode implies an 0xe7fXXXfX value. For Thumb mode 0xdeXX. We use this space for breakpoints. 2 unfortunately depends on the platform. -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
