在 2020/8/7 下午10:51, Alexander Duyck 写道: > I wonder if this entire section shouldn't be restructured. This is the > only spot I can see where we are resetting the LRU flag instead of > pulling the page from the LRU list with the lock held. Looking over > the code it seems like something like that should be possible. I am > not sure the LRU lock is really protecting us in either the > PageCompound check nor the skip bits. It seems like holding a > reference on the page should prevent it from switching between > compound or not, and the skip bits are per pageblock with the LRU bits > being per node/memcg which I would think implies that we could have > multiple LRU locks that could apply to a single skip bit. Hi Alexander, I don't find problem yet on compound or skip bit usage. Would you clarify the issue do you concerned? Thanks!
