From nobody Sun Dec 14 19:32:30 2025 Received: from mail-qt1-f170.google.com (mail-qt1-f170.google.com [209.85.160.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 544CF28682 for ; Wed, 21 May 2025 14:25:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747837533; cv=none; b=Os+JSve9KJ+tV8Ah+B0KqhdDrLo3hK3vRt4pB4NhpdZ5g01ml2u9P4kO620uw0diVBPEJBRMc7KkL0wEBZkkmT90tvG0/IW6rzyvDET7SHWP+TQDkhg/vUW3n6fEa6vfU97RyIEWOtWLz7lFn1VTZoWz4qQctXP4ixiMrT05wPc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747837533; c=relaxed/simple; bh=mzjzwYXMnl0Y9sPCYNk++GhXlXikWDBHEDBD+zWzPnk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=hKUIqR0gXeO19F31jyfwS3J8Xb0qDxJ3jySXkRA+iqyHyQDEq0Nel7tScAgOP3bHAfJUoJW6Ev9LyflOuhJLVSWfjZMeZUyGEkccXxo0+vEXWZhwC+ACyoq6sMvaMmUhdVHZo/iBZxsSBU31dd3GUPx2TMaY57SI59dx+mzG/q8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=NDkWqCGh; arc=none smtp.client-ip=209.85.160.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="NDkWqCGh" Received: by mail-qt1-f170.google.com with SMTP id d75a77b69052e-47692b9d059so94913151cf.3 for ; Wed, 21 May 2025 07:25:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1747837531; x=1748442331; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=bTV+0yNwT2AirgQziM0cVofsthdmprW68m/JVhQEzJw=; b=NDkWqCGhz0T64i67P9dEylwFdzcQ37Gs5KPMj6fls9fI13udygkLxucRY04gazJ0El TO1K1DU2luXmdkFZS5pa8z7XOXEkW/LLL8tlbyADFGcaVXHlMmNOXrwTypf0lOxt2Xt+ jvLC5Jge8IPZzs5XE5fehlAL9g3eAv7jnfgHq8Ffsaugim4fU/M+QCqaE7zqWKX8u7B7 G97fckrOgkxcLhNPaqI8YrZBLX+z7yBBh/rww1RgzcBmQDhkrxuQkFa+Q/jP8EgKnCM+ Dle6wcP+U9p2wAaFKyw8Kwr2iIWx/Aqzgnk+XkzfPDunvmq6/PBcGnq1UtYQmIYOayGr T1eg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747837531; x=1748442331; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=bTV+0yNwT2AirgQziM0cVofsthdmprW68m/JVhQEzJw=; b=Hi2hMBqFChg11F4Ip1sdW2Ao4UEYAoFIv3HwDpAVtQqldd/yD4uZVhlt2220UV9WqY zfVsCIN3TYx4UMWh3XFRSLN7YfZ0Vs9/YNrm0g+ojdgrpUSlxnAmkvDDsNRPDUNCDHlc zLflwOGEKWnwbxvWQqZLOjAuBPgxprYW2IHX4AcKc0SjzlBJdXJzY4xv45szwUifzH7v 0vsQxANxsa6/wr0urI53WIS17t7x6udlovLAqNiFvXeaHXcD07DCLAU7qZ/AFcjji0mi W55LiyWoO3bDp0T06mUqsM+WnqC9rQodO5Ar+DAWsDnDZsYhGJxcCh765wwJVhkfPuVZ V3iQ== X-Forwarded-Encrypted: i=1; AJvYcCXQksmDydx+GC9bl/x+dqrLhMFbjK2LiJnXt75VnqjrIFjP/Qu2Q5hVvEh13f1qgg2vxpX9IXnZhViJT8U=@vger.kernel.org X-Gm-Message-State: AOJu0Yw47VOG0Q5b95xDg2Rf4ZidIY3gtH10ljJ3ukf2j0s2GUrqJ5ZQ s4fU5uad00LAmEVSYEriOCRcHkGNhcaU7Rm7mEzcCcR0h4idEOkrXqgD X-Gm-Gg: ASbGncs65rXXv3Xr+hjplJjH9hex+uLzqHmarHIbSrU2iOLshECvcSjKXlFrdsi++9h pX6pR9b6kIitoL6ax34ydpVHma9JZs6JoKNQ0RZMe1LcLQPCn6oy3ZCbO7skboD8pWjWFmQaQLB OUUB8HjSrP1r1Y9hht7jRb0zQoPmaERwInFHFrrNsoqdlcKOyiG30b5b1Mmqu1av0qeiwQAX3LT q6LUZ/loy3Vg2xQ/p2DfKB302h5T6t5MKORRmLY/2Zhq1y0tYCW/C84nZ+7DZO40Wka18Au77WJ KCt8Q/0S9uqze4ZDw/KZb156PChko1/T8jjp9zLg1yZ6CUOqVaeZS4oxPbf/ X-Google-Smtp-Source: AGHT+IGJ0ff2P8PVMyFv7jR8lBEHrrx/8AzvYD2AyqGTlxL78Q+9oY84GVU7SAYIqbomBI8CnqDdLQ== X-Received: by 2002:ac8:5ccd:0:b0:476:739a:5cf3 with SMTP id d75a77b69052e-494b074d0c6mr371222921cf.1.1747837531149; Wed, 21 May 2025 07:25:31 -0700 (PDT) Received: from localhost ([2a03:2880:20ff:43::]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-494ae528f08sm84171971cf.72.2025.05.21.07.25.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 May 2025 07:25:30 -0700 (PDT) From: Usama Arif To: Andrew Morton , surenb@google.com Cc: hannes@cmpxchg.org, shakeel.butt@linux.dev, vlad.wing@gmail.com, linux-mm@kvack.org, kent.overstreet@linux.dev, cl@gentwo.org, rientjes@google.com, vbabka@suse.cz, roman.gushchin@linux.dev, harry.yoo@oracle.com, linux-kernel@vger.kernel.org, kernel-team@meta.com, Usama Arif Subject: [PATCH] mm: slub: do not warn when allocating slab obj extensions fails Date: Wed, 21 May 2025 15:25:21 +0100 Message-ID: <20250521142521.3033264-1-usamaarif642@gmail.com> X-Mailer: git-send-email 2.47.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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. Failing this allocation is not indicative of a bug, so remove the warning. Signed-off-by: Usama Arif Reported-by: Vlad Poenaru Closes: https://lore.kernel.org/all/17fab2d6-5a74-4573-bcc3-b75951508f0a@gm= ail.com/ --- 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 | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index dc9e729e1d26..06ab9a558b73 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2102,9 +2102,7 @@ prepare_slab_obj_exts_hook(struct kmem_cache *s, gfp_= t flags, void *p) =20 slab =3D 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)) return NULL; =20 return slab_obj_exts(slab) + obj_to_index(s, slab, p); --=20 2.47.1