Re: Very aggressive memory reclaim

[Andi Kleen]

Dave Chinner <david@xxxxxxxxxxxxx> writes:
>
> First it would be useful to determine why the VM is reclaiming so
> much memory. If it is somewhat predictable when the excessive
> reclaim is going to happen, it might be worth capturing an event

Often it's to get pages of a higher order. Just tracing alloc_pages
should tell you that.

There are a few other cases (like memory failure handling), but they're
more obscure.

-Andi
-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/