On Tue, Nov 23, 2021 at 07:24:42PM -0800, Andrew Morton wrote: > On Sat, 20 Nov 2021 17:44:29 +0000 "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> wrote: > > > Pages are individually marked as suffering from hardware poisoning. > > Checking that the head page is not hardware poisoned doesn't make > > sense; we might be after a subpage. We check each page individually > > before we use it, so this was an optimisation gone wrong. > > What were the runtime effects of this bug? We'd fall back to the slow path when there was no need to do that.
