Re: [PATCH v5 00/12] MADV_FREE support

[Minchan Kim]

On Thu, Jan 28, 2016 at 08:16:25AM +0100, Michael Kerrisk (man-pages) wrote:
> Hello Minchan,
> 
> On 11/30/2015 07:39 AM, Minchan Kim wrote:
> > In v4, Andrew wanted to settle in old basic MADV_FREE and introduces
> > new stuffs(ie, lazyfree LRU, swapless support and lazyfreeness) later
> > so this version doesn't include them.
> > 
> > I have been tested it on mmotm-2015-11-25-17-08 with additional
> > patch[1] from Kirill to prevent BUG_ON which he didn't send to
> > linux-mm yet as formal patch. With it, I couldn't find any
> > problem so far.
> > 
> > Note that this version is based on THP refcount redesign so
> > I needed some modification on MADV_FREE because split_huge_pmd
> > doesn't split a THP page any more and pmd_trans_huge(pmd) is not
> > enough to guarantee the page is not THP page.
> > As well, for MAVD_FREE lazy-split, THP split should respect
> > pmd's dirtiness rather than marking ptes of all subpages dirty
> > unconditionally. Please, review last patch in this patchset.
> 
> Now that MADV_FREE has been merged, would you be willing to write
> patch to the madvise(2) man page that describes the semantics, 
> noes limitations and restrictions, and (ideally) has some sentences
> describing use cases?
> 

Hello Michael,

Could you review this patch?

Thanks.