On Sat, Feb 29, 2020 at 08:59:05AM -0800, Matthew Wilcox wrote: > From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> > > Back in 2005, we merged a patch from Akamai that sped up /proc/$pid/maps > by using f_version to stash the user virtual address that we'd just > displayed. That wasn't necessary; we can just use the private *ppos for > the same purpose. There have also been some other odd choices made over > the years that use the seq_file infrastructure in some non-idiomatic ways. > > Tested by using 'dd' with various different 'bs=' parameters to check that > calling ->start, ->stop and ->next at various offsets work as expected. /proc part looks OK, I only ask to include this description into first patch, so it doesn't get lost. Often 0/N patch is the most interesting part of a series.
