Re: [PATCH 2/4] mm/page_alloc: correct return value when failing at preparing

[Mel Gorman <mgorman@techsingularity.net>]

On Tue, Jul 13, 2021 at 02:21:58PM +0000, Chuck Lever III wrote:
> 
> 
> > On Jul 13, 2021, at 9:56 AM, Mel Gorman <mgorman@techsingularity.net> wrote:
> > 
> > From: Yanfei Xu <yanfei.xu@windriver.com>
> > 
> > If the array passed in is already partially populated, we should
> > return "nr_populated" even failing at preparing arguments stage.
> > 
> > Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
> > Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
> > Link: https://lore.kernel.org/r/20210709102855.55058-1-yanfei.xu@windriver.com
> > ---
> > mm/page_alloc.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> > index 6ef86f338151..803414ce9264 100644
> > --- a/mm/page_alloc.c
> > +++ b/mm/page_alloc.c
> > @@ -5255,7 +5255,7 @@ unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid,
> > 	gfp &= gfp_allowed_mask;
> > 	alloc_gfp = gfp;
> > 	if (!prepare_alloc_pages(gfp, 0, preferred_nid, nodemask, &ac, &alloc_gfp, &alloc_flags))
> > -		return 0;
> > +		return nr_populated;
> 
> Can you restore the hunk in patch 3/4 that changes this "return nr_populated;"
> to "goto out;" ?
> 

I fixed that up in the series I sent out. I applied this patch first
then reconciled the collision with your patch.

-- 
Mel Gorman
SUSE Labs