On Fri, 2012-04-27 at 09:53 -0400, Jason Baron wrote: > Right, for x86 which uses stop_machine currently, we guarantee that all > cpus are going to see the updated code, before the inc of key->enabled. > However, other arches (sparc, mips, powerpc, for example), seem to be > using much lighter weight updates, which I hope are ok :) And x86 will soon be removing stop_machine() from its path too. But all archs should perform some kind of memory sync after patching code. Thus the update should be treated as if a memory barrier was added after it, and before the inc. -- Steve -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
