Messages in this thread | | | Date | Thu, 13 Nov 2008 19:27:29 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH -mm] vmscan: bail out of page reclaim after swap_cluster_max pages |
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On Thu, 13 Nov 2008 17:12:08 -0500 Rik van Riel <riel@redhat.com> wrote:
> Sometimes the VM spends the first few priority rounds rotating back > referenced pages and submitting IO. Once we get to a lower priority, > sometimes the VM ends up freeing way too many pages. > > The fix is relatively simple: in shrink_zone() we can check how many > pages we have already freed and break out of the loop. > > However, in order to do this we do need to know how many pages we already > freed, so move nr_reclaimed into scan_control.
There was a reason for not doing this, but I forget what it was. It might require some changelog archeology. iirc it was to do with balancing scanning rates between the various things which we scan.
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