[PATCH] mm/page_alloc: Fix race condition between build_all_zonelists and page allocation

[Mel Gorman]

On Wed, Aug 24, 2022 at 12:10:11PM +0200, Michal Hocko wrote:
> On Wed 24-08-22 10:49:01, Mel Gorman wrote:
> > +static unsigned int zonelist_iter_begin(void)
> > +{
> > +	if (IS_ENABLED(CONFIG_MEMORY_HOTREMOVE))
> > +		return 0;
> > +
> > +	return read_seqbegin(&zonelist_update_seq);
> > +}
> > +
> > +static unsigned int check_retry_zonelist(unsigned int seq)
> > +{
> > +	if (IS_ENABLED(CONFIG_MEMORY_HOTREMOVE))
> > +		return seq;
> > +
> > +	return read_seqretry(&zonelist_update_seq, seq);
> > +}
> 
> these should be negated

Yey, last minute changes that are rushed. V2 shortly.

-- 
Mel Gorman
SUSE Labs