On 4/22/21 1:57 PM, Yu Zhao wrote: > On Thu, Apr 22, 2021 at 2:38 PM Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx> wrote: >> >> >> >> On 4/22/21 1:30 PM, Yu Zhao wrote: >>> >>> HZ/10 is purely arbitrary but that's ok because we assume normally >>> nobody hits it. If you do often, we need to figure out why and how not >>> to hit it so often. >>> >> >> Perhaps Zhengjun can test the proposed fix in his test case to see if the timeout value >> makes any difference. > > Shakeel has another test to stress page reclaim to a point that the > kernel can livelock for two hours because of a large number of > concurrent reclaimers stepping on each other. He might be able to > share that test with you in case you are interested. That will be great. Yes, we are interested to have the test. Tim > > Also it's Hugh who first noticed that migration can isolate many pages > and in turn block page reclaim. He might be able to help too, in case > you are interested in the interaction between migration and page > reclaim. > > Thanks. >
