On Mon, May 9, 2011 at 3:31 PM, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > With current kernels, I think the stack expands by one page during the > mlockall (for STACK_GROWSUP), with the patch it shouldn't. Tried this on ia64 (with a mod because the upward growing stack isn't blessed with the [stack] annotation, only the downward growing stack gets that honour). ia64 builds, boots, and processes can still grow stacks (both of them). The patched kernel doesn't change the size of the upwardly growing stack across the mlockall(). -Tony P.S. while we could start both stacks on the same page and have the grow away from the start point, ia64 actually starts them out a fair distance apart and lets them run into each other (if you have enough memory to let them grow that far, and if ulimit -s doesn't stop them earlier) -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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