>Page migration is particular suitable for the creation of this race since >it needs to remove and restore page table entries. I'm trying to understand why we haven't seen this problem before page migration was invented. Surely in the swapout case we have the same situation ... swapper does "*pte = 0 ... ptc" to zap the pte and nuke the TLB (in that order), but there is a window in between where the process might try to update the accessed/dirty bits. Have we just been lucky? Is the window much wider for the process migration case? -Tony - : 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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