On Mon, Oct 24, 2022 at 01:28:31PM -0700, Linus Torvalds wrote: > It does sound like we now very much have hard data for "the page > waitlist complexity is now a bigger problem than the historical > problem it tried to solve". > > So I'll happily apply it. The only question is whether it's a "let's > do this for 6.2", or if it's something that we'd want to back-port > anyway, and might as well apply sooner rather than later as a fix. > > I think that in turn then depends on just how artificial the test case > was. If the test case was triggered by somebody seeing problems in > real life loads, that would make the urgency a lot higher. But if it > was purely a synthetic test case with no accompanying "this is what > made us look at this" problem, it might be a 6.2 thing. > > Arechiga? > > Also, considering that Willy authored the patch (even if it's really > just a "remove this whole code logic"), maybe he has opinions? Willy? I've been carrying a pair of patches in my tree to rip out the wait bookmarks since March, waiting for me to write a userspace testcase to reproduce the problem against v4.13 and then check it no longer does so against v5.0. Unfortunately, that hasn't happened. I'm happy to add Arechiga's Tested-by, and submit them to Andrew and have him bring them into v6.2, since this doesn't seem urgent?
