> The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was > removed. SLUB instead relies on the page allocator's NUMA policies. > Change the flag's value to 0 to free up the value it had, and mark it > for full removal once all users are gone. > > Reported-by: Steven Rostedt <rostedt@xxxxxxxxxxx> > Closes: https://lore.kernel.org/all/20240131172027.10f64405@xxxxxxxxxxxxxxxxxx/ > Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx> Ran a rough test with build and bootup, feel free to add Tested-by: Xiongwei Song <xiongwei.song@xxxxxxxxxxxxx> Reviewed-by: Xiongwei Song <xiongwei.song@xxxxxxxxxxxxx> > --- > include/linux/slab.h | 5 +++-- > mm/slab.h | 1 - > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/include/linux/slab.h b/include/linux/slab.h > index b5f5ee8308d0..6252f44115c2 100644 > --- a/include/linux/slab.h > +++ b/include/linux/slab.h > @@ -96,8 +96,6 @@ > */ > /* Defer freeing slabs to RCU */ > #define SLAB_TYPESAFE_BY_RCU ((slab_flags_t __force)0x00080000U) > -/* Spread some memory over cpuset */ > -#define SLAB_MEM_SPREAD ((slab_flags_t __force)0x00100000U) > /* Trace allocations and frees */ > #define SLAB_TRACE ((slab_flags_t __force)0x00200000U) > > @@ -164,6 +162,9 @@ > #endif > #define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */ > > +/* Obsolete unused flag, to be removed */ > +#define SLAB_MEM_SPREAD 0 > + > /* > * ZERO_SIZE_PTR will be returned for zero sized kmalloc requests. > * > diff --git a/mm/slab.h b/mm/slab.h > index 54deeb0428c6..f4534eefb35d 100644 > --- a/mm/slab.h > +++ b/mm/slab.h > @@ -469,7 +469,6 @@ static inline bool is_kmalloc_cache(struct kmem_cache *s) > SLAB_STORE_USER | \ > SLAB_TRACE | \ > SLAB_CONSISTENCY_CHECKS | \ > - SLAB_MEM_SPREAD | \ > SLAB_NOLEAKTRACE | \ > SLAB_RECLAIM_ACCOUNT | \ > SLAB_TEMPORARY | \ > > -- > 2.43.1
