From nobody Fri Jun 12 14:18:39 2026 Received: from esa8.hc1455-7.c3s2.iphmx.com (esa8.hc1455-7.c3s2.iphmx.com [139.138.61.253]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C86CD39D6E7; Thu, 14 May 2026 09:34:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=139.138.61.253 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778751259; cv=none; b=U8H2SDYZ60QWpyxWaFhJ1hjeDTofOJ9a8ebBY5DmER8Kn8AifBdhzKJ7pTty7b+E8o9yepFwpi0FYyTxQKvxD9nJ7t+i1ueVCahqk3vWFZQ8lvKMLj/F9xgfP5Qo1sDm8KuIXpYh7BtrpwKT6SQhKVnFEIeGeuEVTks3qjU3Pbw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778751259; c=relaxed/simple; bh=fDawJLoVbJW9DQMIgEDksrxqneT+9Loc/Ww6UOHOFV8=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version:Content-Type; b=Cfxjs/mzfkb7N51O0Ijn0SnDakedwNWEsutvoiyaq99U9E2/L7NweSIPEODVdxnrZcryNe6rSz3kIPaM5koaSEbWq9I4Cii/utucxiKAhk666iY2A8dvPlzymenPby1tEW+zkZyFwRjnM20bQUoO1PXp3iVRTIh2mvhwx3ia00U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fujitsu.com; spf=pass smtp.mailfrom=fujitsu.com; dkim=pass (2048-bit key) header.d=fujitsu.com header.i=@fujitsu.com header.b=rt8dhCB6; arc=none smtp.client-ip=139.138.61.253 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fujitsu.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fujitsu.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fujitsu.com header.i=@fujitsu.com header.b="rt8dhCB6" DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=fujitsu.com; i=@fujitsu.com; q=dns/txt; s=fj2; t=1778751258; x=1810287258; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=fDawJLoVbJW9DQMIgEDksrxqneT+9Loc/Ww6UOHOFV8=; b=rt8dhCB6YzvqDV29yqBTGnU2Ku1AsbVBk6aKhaoV63c27vVYBe0x+tKV fxPkyeXUfMJa0p+hjbLcG0i/UMX4gi9NicGwA9Etkq+6xPzzHNYueboMP cvrEubyu7feRtAaq8C3I0TDRLE6RRGlyoBVFYmI8x8OgtqEOeRPZ/PbI1 kfCO32x6+/kPz/mLnEerArP4FC/H5CX3el6NZ4mYGAJ9tuhrUqp7IRbXw pBJi1UEVvKtL+8tk3DxoA0tC/F9VAnesXTqpHUKxPvQdM4m1WelTHrgt6 Qcv0pB1RbnWbLyrPM8SITbLmz4qxKE2OGx5y/C6RKIvq2Zkvb0ne0+8jk A==; X-CSE-ConnectionGUID: SZ38OUN5TYSm18ggFaoR4Q== X-CSE-MsgGUID: HFhQfCOfRuaku5Ge1v7Tzg== X-IronPort-AV: E=McAfee;i="6800,10657,11785"; a="228496063" X-IronPort-AV: E=Sophos;i="6.23,234,1770562800"; d="scan'208";a="228496063" Received: from gmgwnl01.global.fujitsu.com ([52.143.17.124]) by esa8.hc1455-7.c3s2.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 May 2026 18:33:06 +0900 Received: from az2nlsmgm3.fujitsu.com (unknown [10.150.26.205]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by gmgwnl01.global.fujitsu.com (Postfix) with ESMTPS id 1A1A61000349; Thu, 14 May 2026 09:33:06 +0000 (UTC) Received: from az2uksmom4.o.css.fujitsu.com (az2uksmom4.o.css.fujitsu.com [10.151.22.204]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by az2nlsmgm3.fujitsu.com (Postfix) with ESMTPS id BE31F1807162; Thu, 14 May 2026 09:33:05 +0000 (UTC) Received: from dhcp-portal (unknown [10.172.107.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by az2uksmom4.o.css.fujitsu.com (Postfix) with ESMTPS id 42F27406855; Thu, 14 May 2026 09:33:04 +0000 (UTC) Received: from isar2.ecs00.fujitsu.local (unknown [10.172.183.27]) by dhcp-portal (Postfix) with ESMTP id 50BD3608E9; Thu, 14 May 2026 11:33:03 +0200 (CEST) From: Tomasz Wolski To: smita.koralahallichannabasappa@amd.com, alison.schofield@intel.com, dan.j.williams@intel.com Cc: linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, nvdimm@lists.linux.dev, ardb@kernel.org, benjamin.cheatham@amd.com, dave.jiang@intel.com, jonathan.cameron@huawei.com, Tomasz Wolski Subject: [PATCH] dax/bus: Upgrade resource conflict message to dev_err() in alloc_dax_region() Date: Thu, 14 May 2026 11:32:08 +0200 Message-Id: <20260514093208.13110-1-tomasz.wolski@fujitsu.com> X-Mailer: git-send-email 2.35.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The dax_region resource conflict in alloc_dax_region() indicates a serious configuration problem =E2=80=94 two subsystems (e.g. dax_hmem and dax_cxl) are attempting to register overlapping address ranges. This is not a transient or debug-level condition; it represents a genuine resource conflict that an administrator needs to be aware of. Promote the log level from dev_dbg() to dev_err() so that the conflict is visible by default without requiring dynamic debug to be enabled. Suggested-by: Dan Williams Link: https://lore.kernel.org/linux-cxl/69c1a8d1c0fa9_7ee3100a1@dwillia2-mo= bl4.notmuch/ Fixes: 34f80bb969cc ("dax: Track all dax_region allocations under a global = resource tree") Signed-off-by: Tomasz Wolski --- drivers/dax/bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c index 68437c05e21d..cd963eeeef7b 100644 --- a/drivers/dax/bus.c +++ b/drivers/dax/bus.c @@ -672,7 +672,7 @@ struct dax_region *alloc_dax_region(struct device *pare= nt, int region_id, =20 rc =3D request_resource(&dax_regions, &dax_region->res); if (rc) { - dev_dbg(parent, "dax_region resource conflict for %pR\n", + dev_err(parent, "dax_region resource conflict for %pR\n", &dax_region->res); goto err_res; } --=20 2.47.3