Re: [oom]: [0/4] fix OOM deadlock running OAST

[William Lee Irwin III <wli@holomorphy.com>]

William Lee Irwin III <wli@holomorphy.com> wrote:
>> Also, as we're fixing this a different way, could you clarify for me
>> which of the pieces of the original fix or related things (e.g. the
>> zone->all_unreclaimable stuff, yanking PG_wired stuff off the LRU,
>> maybe more) you wanted me to rework and send back in later?

On Wed, Jun 23, 2004 at 06:07:22PM -0700, Andrew Morton wrote:
> Well none, really.  This problem is now fixed, is it not?
> It would be nice to fix up the unrelated issue of putting unbacked pages
> onto the LRU.  Could do that by adding backing_dev_info.not_on_lru, check
> that in the various places where we add pages to the LRU.
> Or, conceivably, do it lazily: take these pages off the LRU if we encounter
> them in page reclaim.  This might be a net win - do extra work for the rare
> case, less work for the common case.
> Something like this:

To me, this resembles reworking the LRU removal bits. I'll flesh out
the example you posted in the way you've suggested (via backing_dev_info).

Thanks.


-- wli