On Wed, Jun 26, 2013 at 09:10:50PM +0200, Stephane Eranian wrote: > After more investigation with the author of the false sharing > detection tool, I think > that if the mapping changes, it is okay. The tool can detect this and > drop the analysis > at that address. So as long as we can flag the mapping change, we are > okay. Hopefully, > it does not occur frequently. If so, then I think there are bigger > issues to fix on the system > than false sharing.
But if you index everything using dev:inode:offset it doesn't matter if the mapping changes; you're invariant to map placement. And the thing is; we already compute most of that anyway in order to find the code in DSOs, except there we use filename instead of dev:inode. However if there were means to open files using dev:inode that might actually be more reliable than using the filename. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
