Re: Can't make use of swap memory in 2.6.7-bk19

Andrew Morton
2004-07-09T02:14:29Z

William Lee Irwin III <wli@holomorphy.com> wrote:
>
> William Lee Irwin III wrote:
> >> They added a flag indicating wiredness or no to the gfp_mask, which was
> >> then propagated down the call chain and eventually passed as an argument
> >> to out_of_memory(). In turn, out_of_memory() used the flag to determine
> >> whether the nr_swap_pages > 0 check was relevant. i.e. they refined the
> >> OOM conditions based on the wiredness of the failing allocation. What
> >> probably got the stuff permavetoed was the stats reporting I did along
> >> with it that would have been trivial to drop while retaining the needed
> >> functional change. The patch was motivated by the nr_swap_pages > 0
> >> check deadlocking. The __GFP_WIRED business was done to discriminate
> >> the obvious deadlocking scenario from the false OOM mentioned here.
>
> On Fri, Jul 09, 2004 at 12:06:54PM +1000, Nick Piggin wrote:
> > No, I did see those patches. I'm not saying they're not worth
> > persuing; on the contrary, they look quite interesting. However,
> > it might worthwhile looking at more basic things first, for this
> > problem anyway.
>
> Enumerate those more basic things.
>

1: work out why it's prematurely calling out_of_memory() when laptop_mode=1.