On Thu, 24 Aug 2017 10:00:49 +0200 Vlastimil Babka [off-list ref] wrote:

quoted

Even if a
shrinker has a mistake, VM will have big trouble like infinite loop.

We could fake 0 as 1 or something, at least.

If the shrinker returns sc->nr_scanned==0 then that's a buggy shrinker
- it should return SHRINK_STOP in that case.  Only a single shrinker
(i915) presently uses sc->nr_scanned and that one gets it right.  I
think it's OK - there's a limit to how far we should go defending
against buggy kernel code, surely.



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