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Hello, > > > During hotunplug, you copy pages to new locaion. Would it simplify > > > code if you forced them to be swapped out, instead? [Yep, it would be > > > slower...] > > > > There are some pages that will have to be copied (e.g. pages that > > the user "mlock()d" should still be locked in their new location, > > same for hugetlbfs pages). And some pages which aren't associated with backing store like sysfs or ramdisk have to be, too. > Using kswapd is easy, but doesn't always work well. The patch > contains the code to ignore page accessed bits when kswapd is run on > disabled zones, but that's not enough for swapping out frequently used > pages. > In my patch, page copying, or "remapping", solves this problem by > blocking accesses to the page under operation. Thank you, Hirokazu Takahashi. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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