On Wed 27-09-17 22:41:17, Minchan Kim wrote: > On Wed, Sep 27, 2017 at 03:22:41PM +0200, Michal Hocko wrote: [...] > > simply cannot disable swap readahead when page-cluster is 0? > > That's was what I want really but Huang want to use two readahead > algorithms in parallel so he wanted to keep two separated disable > knobs.
If it breaks existing and documented behavior then it is a clear regression and it should be fixed. I do not see why this should be disputable at all. Working around an issue with a config option sounds like the wrong way to go because those who cannot do that unconditionally would still see a regression. -- Michal Hocko SUSE Labs
