On Mon, May 29, 2023 at 07:52:10PM +0200, David Sterba wrote: > On Tue, May 23, 2023 at 10:13:14AM +0200, Christoph Hellwig wrote: > > PageError is not used by the VFS/MM and deprecated. > > Is there some reference other than code? I remember LSF/MM talks about > writeback, reducing page flags but I can't find anything that would say > that PageError is not used anymore. For such core changes in the > neighboring subysystems I kind of rely on lwn.net, hearsay or accidental > notice on fsdevel. > > Removing the Error bit handling looks overall good but I'd also need to > refresh my understanding of the interactions with writeback. willy is the driving force behind the PageErro removal, so maybe he has a coherent writeup. But the basic idea is: - page flag space availability is limited, and killing any one we can easily is a good thing - PageError is not well defined and not part of any VM or VFS contract, so in addition to freeing up space it also generally tends to remove confusion.
