lkml.org 
[lkml]   [2016]   [Jul]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 04/31] mm, vmscan: begin reclaiming pages on a per-node basis
On Mon, Jul 04, 2016 at 06:08:27PM +0800, Hillf Danton wrote:
> > @@ -2561,17 +2580,23 @@ static void shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
> > * highmem pages could be pinning lowmem pages storing buffer_heads
> > */
> > orig_mask = sc->gfp_mask;
> > - if (buffer_heads_over_limit)
> > + if (buffer_heads_over_limit) {
> > sc->gfp_mask |= __GFP_HIGHMEM;
> > + sc->reclaim_idx = classzone_idx = gfp_zone(sc->gfp_mask);
> > + }
> >
> We need to push/pop ->reclaim_idx as ->gfp_mask handled?
>

I saw no harm in having one full reclaim attempt reclaiming from all
zones if buffer_heads_over_limit was triggered. If it fails, the page
allocator will loop again and reset the reclaim_idx.

--
Mel Gorman
SUSE Labs

\
 
 \ /
  Last update: 2016-07-04 13:21    [W:0.029 / U:0.600 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site