On Sat, 19 Sep 2026 01:24:30 +0100 Kiryl Shutsemau <[email protected]> wrote:
> From: "Kiryl Shutsemau (Meta)" <[email protected]> > > khugepaged collapses to mTHP orders since 7.2, and 7.3 added three > selftest cases for it: the generic collapse cases run at one order named > by -c, with the result detected by counting folios of that order. > > That leaves the collapse path largely untested. The suite does not run > where a PMD is 512M. A folio count cannot say where a collapse landed. > Fixed sleeps cannot tell "not collapsed" from "not scanned yet". And > nothing exercises collapse under contention. > > Close those gaps in order: > Thanks, I've added this to mm-new. I'd previous added v5 but it never really got testing exposure due to a messy interaction with other changes which I didn't get onto fixing.
