On Tue, Apr 22, 2014 at 01:23:12PM +0200, Borislav Petkov wrote: > I wonder if it would be workable to use a bit in the espfix PGD to > denote that it has been initialized already... I hear, near NX there's > some room :-)
Ok, I realized this won't work when I hit send... Oh well. Anyway, another dumb idea: have we considered making this lazy? I.e., preallocate pages to fit the stack of NR_CPUS after smp init is done but not setup the percpu espfix stack. Only do that in espfix_fix_stack the first time we land there and haven't been setup yet on this cpu. This should cover the 1% out there who still use 16-bit segments and the rest simply doesn't use it and get to save themselves the PT-walk in start_secondary(). Hmmm... -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- 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/