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List-Subscribe: List-Unsubscribe: On Fri, May 23, 2025 at 05:52:40PM +0100, Usama Arif wrote: > In memory bound systems, a large number of warnings for failing this > allocation repeatedly may mask any real issues in the system > during memory pressure being reported in dmesg. Change this to > warning only once. > > Signed-off-by: Usama Arif > Reported-by: Vlad Poenaru > Closes: https://urldefense.com/v3/__https://lore.kernel.org/all/17fab2d6-5a74-4573-bcc3-b75951508f0a@gmail.com/__;!!ACWV5N9M2RV99hQ!Nv5xX_X4cBQR_HUDO6qfamxI0GEW1eFRCpPj29lANRashIUJDrEWAjU7vlys76FH0voShW07CjpDkzSST46Irg$ > --- Acked-by: Harry Yoo > v2 -> v3: > - Put warning back, but only warn once with pr_warn_once. > v1 -> v2: > - remove the warning completely. We will have a way in the > future to indicate that the mem alloc profile is inaccurate. > --- > mm/slub.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > diff --git a/mm/slub.c b/mm/slub.c > index dc9e729e1d26..36d7c43a6f2a 100644 > --- a/mm/slub.c > +++ b/mm/slub.c > @@ -2102,10 +2102,12 @@ prepare_slab_obj_exts_hook(struct kmem_cache *s, gfp_t flags, void *p) > > slab = virt_to_slab(p); > if (!slab_obj_exts(slab) && > - WARN(alloc_slab_obj_exts(slab, s, flags, false), > - "%s, %s: Failed to create slab extension vector!\n", > - __func__, s->name)) > + alloc_slab_obj_exts(slab, s, flags, false)) { > + pr_warn_once("%s, %s: Failed to create slab extension vector!\n", > + __func__, s->name); > return NULL; > + } > + > > return slab_obj_exts(slab) + obj_to_index(s, slab, p); > } > -- > 2.47.1 > -- Cheers, Harry / Hyeonggon