On Fri, 2 Aug 2019 16:18:40 +0800 Michal Hocko wrote: > > [Hillf, your email client or workflow mangles emails. In this case you > are seem to be reusing the message id from the email you are replying to > which confuses my email client to assume your email is a duplicate.] [Hi Michal, I sent the previous mail with Message-id: <7EE30F16-A90B-47DC-A065-3C21881CD1CC@xxxxxxxxx> using git send-email after quitting vi. That tag is removed from this message and get me informed if it makes your mail client happy.] > > Huh, what? You are effectively saying that we should fail the charge > when the requested nr_pages would fit in. This doesn't make much sense > to me. What are you trying to achive here? The report looks like the result of a tight loop. I want to break it and make the end result of do_page_fault unsuccessful if nr_retries rounds of page reclaiming fail to get work done. What made me a bit over stretched is how to determine if the chargee is a memhog in memcg's vocabulary. What I prefer here is that do_page_fault succeeds, even if the chargee exhausts its memory quota/budget granted, as long as more than nr_pages can be reclaimed _within_ nr_retries rounds. IOW the deadline for memhog is nr_retries, and no more. Thanks Hillf
