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2026 at 3:17 PM Vlastimil Babka wrote: > >> @@ -337,6 +331,13 @@ struct kmem_cache *__kmem_cache_create_args(const char *name, > >> flags &= ~SLAB_DEBUG_FLAGS; > >> #endif > >> > >> + /* > >> + * Caches with specific capacity are special enough. It's simpler to > >> + * make them unmergeable. > >> + */ > >> + if (args->sheaf_capacity) > >> + flags |= SLAB_NO_MERGE; > > > > So, this is very subtle and maybe not that important but the comment > > for kmem_cache_args.sheaf_capacity claims "When slub_debug is enabled > > for the cache, the sheaf_capacity argument is ignored.". With this > > change this argument is not completely ignored anymore... It sets > > SLAB_NO_MERGE even if slub_debug is enabled, doesn't it? > > True, but the various debug flags set by slub_debug also prevent merging so > it doesn't change the outcome. nit: except for slub_debug=F (SLAB_CONSISTENCY_CHECKS), since it doesn't prevent merging (it's in SLAB_DEBUG_FLAGS but not in SLAB_NEVER_MERGE). -- Cheers, Harry / Hyeonggon