+#ifdef CONFIG_MEMORY_MIRROR + if (change_to_mirror(gfp_mask, ac.high_zoneidx)) + ac.migratetype = MIGRATE_MIRROR; +#endif
We may have to be smarter than this here. I'd like to encourage the enterprise Linux distributions to set CONFIG_MEMORY_MIRROR=y But the reality is that most systems will not configure any mirrored memory - so we don't want the common code path for memory allocation to call functions that set the migrate type, try to allocate and then fall back to a non-mirror when that may be a complete waste of time. Maybe a global "got_mirror" that is true if we have some mirrored memory. Then code is if (got_mirror && change_to_mirror(...)) -- 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/