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List-Unsubscribe: On Mon, Mar 31, 2025 at 08:23:36PM -0700, Alexei Starovoitov wrote: > From: Alexei Starovoitov > > Fix an obvious bug. try_alloc_pages() should set_page_refcounted. > > Fixes: 97769a53f117 ("mm, bpf: Introduce try_alloc_pages() for opportunistic page allocation") > Signed-off-by: Alexei Starovoitov > --- > > As soon as I fast forwarded and rerun the tests the bug was > seen immediately. > I'm completely baffled how I managed to lose this hunk. > I'm pretty sure I manually tested various code paths of > trylock logic with CONFIG_DEBUG_VM=y. > Pure incompetence :( > Shame. Better now than later... :) Looks good to me, Reviewed-by: Harry Yoo > --- > mm/page_alloc.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index ffbb5678bc2f..c0bcfe9d0dd9 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -7248,6 +7248,9 @@ struct page *try_alloc_pages_noprof(int nid, unsigned int order) > > /* Unlike regular alloc_pages() there is no __alloc_pages_slowpath(). */ > > + if (page) > + set_page_refcounted(page); > + > if (memcg_kmem_online() && page && > unlikely(__memcg_kmem_charge_page(page, alloc_gfp, order) != 0)) { > free_pages_nolock(page, order); > -- > 2.47.1 -- Cheers, Harry (formerly known as Hyeonggon)