From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailout4.samsung.com (mailout4.samsung.com [203.254.224.34]) (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 69E04B661 for ; Mon, 6 Oct 2025 04:58:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759726697; cv=none; b=EexGzZM1cIesjTaYrbmx9lt1zX8D/3gNqwG3Fau6DUDRPX/5iZ69lHXm8X3fIQgyYGDg9sBhb2Y3F3LupdYDAWVeoJzPENx+7NvJhooExqVpJT6+MeBdZANAqYMsffAXTPl+UWuf85EItBvYUmRr/OYdys0IxG6xh9Z3826O0cM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759726697; c=relaxed/simple; bh=Q2kmveq+C7RooPxNI2u+eaupkIQfD19EQoUNvxI1XPc=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:In-Reply-To: Content-Type:References; b=ewr0YoX0qufIzh0ziBaganmSwhB+DQcbfU2/fOIIS9DwMz9DwDUYtLQl0fiG/jzsX+h5sK2AMx6rk/dUEIft6LUVbB56AMAdS/niqoi3G3kJgchdg3wPD0i1gq6/XMBJc0Y3WmZOYcqJLcuNY/Wh8lvnm7RSzYJYrCS+TU7WAO4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=fh9cJ4iQ; arc=none smtp.client-ip=203.254.224.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="fh9cJ4iQ" Received: from epcas5p1.samsung.com (unknown [182.195.41.39]) by mailout4.samsung.com (KnoxPortal) with ESMTP id 20251006045302epoutp043d75a787936e24340e222221083b1d01~rzdI_1del0356203562epoutp045 for ; Mon, 6 Oct 2025 04:53:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout4.samsung.com 20251006045302epoutp043d75a787936e24340e222221083b1d01~rzdI_1del0356203562epoutp045 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1759726382; bh=nfKFNKfeJiqkNVGd8THAVIqpLF2bjXYQMQChn0Sqbbg=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=fh9cJ4iQxFb/K2uAl8i1VNNwrNfVsnidvhyNF8fQV+VRzsYRnbbzS+Vqw16wmKEKw ntOPLe0jbAMbV4kVgctXk8E8hWQ/LRFoce40YhFZbjwdm5mk9xkkDiyW3AuCJNfaHP dTtpOg32vanRhOABQ6QKSTWY7mxeT0iLVJE5MsqM= Received: from epsnrtp02.localdomain (unknown [182.195.42.154]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPS id 20251006045301epcas5p366ae7b70217b12b8c77f26d410d2ca37~rzdIhCpiN0330803308epcas5p3S; Mon, 6 Oct 2025 04:53:01 +0000 (GMT) Received: from epcpadp2new (unknown [182.195.40.142]) by epsnrtp02.localdomain (Postfix) with ESMTP id 4cg6Mx5Rrfz2SSKY; Mon, 6 Oct 2025 04:53:01 +0000 (GMT) Received: from epsmtip1.samsung.com (unknown [182.195.34.30]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPA id 20250929131341epcas5p3002671c37f155252b7012e141e196d88~pwxRFPOK_3271832718epcas5p3t; Mon, 29 Sep 2025 13:13:41 +0000 (GMT) Received: from test-PowerEdge-R740xd (unknown [107.99.41.79]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20250929131339epsmtip17fa8c0e777da6bc46ea4fc62eb1682a9~pwxPoySny1879918799epsmtip1T; Mon, 29 Sep 2025 13:13:39 +0000 (GMT) Date: Mon, 29 Sep 2025 18:43:31 +0530 From: Neeraj Kumar To: Dave Jiang Cc: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, gost.dev@samsung.com, a.manzanares@samsung.com, vishak.g@samsung.com, neeraj.kernel@gmail.com, cpgs@samsung.com Subject: Re: [PATCH V3 07/20] nvdimm/region_label: Add region label delete support Message-ID: <1983025922.01759726381745.JavaMail.epsvc@epcpadp2new> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <77672d54-8133-4324-9ae7-39d11a335cb2@intel.com> X-CMS-MailID: 20250929131341epcas5p3002671c37f155252b7012e141e196d88 X-Msg-Generator: CA Content-Type: multipart/mixed; boundary="----mxO_4HALYOJvr1vdRg0el_y50LUdjfkHM5FQPcyM.heriKG9=_7331_" CMS-TYPE: 105P X-CPGSPASS: Y X-Hop-Count: 3 X-CMS-RootMailID: 20250917134142epcas5p49d85873cf3ea5f3166c63381ab668fc7 References: <20250917134116.1623730-1-s.neeraj@samsung.com> <20250917134116.1623730-8-s.neeraj@samsung.com> <77672d54-8133-4324-9ae7-39d11a335cb2@intel.com> ------mxO_4HALYOJvr1vdRg0el_y50LUdjfkHM5FQPcyM.heriKG9=_7331_ Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Disposition: inline On 22/09/25 02:37PM, Dave Jiang wrote: > >> +int nd_pmem_region_label_delete(struct nd_region *nd_region) >> +{ >> + struct nd_interleave_set *nd_set = nd_region->nd_set; >> + struct nd_label_ent *label_ent; >> + int ns_region_cnt = 0; >> + int i, rc; >> + >> + for (i = 0; i < nd_region->ndr_mappings; i++) { >> + struct nd_mapping *nd_mapping = &nd_region->mapping[i]; >> + struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); >> + >> + /* Find non cxl format supported ndr_mappings */ >> + if (!ndd->cxl) { >> + dev_info(&nd_region->dev, "Unsupported region label\n"); >> + return -EINVAL; >> + } >> + >> + /* Find if any NS label using this region */ >> + guard(mutex)(&nd_mapping->lock); >> + list_for_each_entry(label_ent, &nd_mapping->labels, list) { >> + if (!label_ent->label) >> + continue; >> + >> + /* >> + * Check if any available NS labels has same >> + * region_uuid in LSA >> + */ >> + if (nsl_region_uuid_equal(label_ent->label, >> + &nd_set->uuid)) >> + ns_region_cnt++; > >Why not just return -EBUSY here immediately? It seems the code returns -EBUSY as long as there's 1 or more below. > >> + } >> + } >> + >> + if (ns_region_cnt) { >> + dev_dbg(&nd_region->dev, "Region/Namespace label in use\n"); >> + return -EBUSY; >> + } >> + >> + for (i = 0; i < nd_region->ndr_mappings; i++) { >> + struct nd_mapping *nd_mapping = &nd_region->mapping[i]; >> + >> + rc = del_labels(nd_mapping, &nd_set->uuid, RG_LABEL_TYPE); >> + if (rc) >> + return rc; >> + } > >Can this be folded into the for loop above or does it a full pass to check before starting the label deletion process? > >DJ Yes, if we use "return -EBUSY" in first loop itself then we can call del_labels() I will fix this in next patch-set Regards, Neeraj ------mxO_4HALYOJvr1vdRg0el_y50LUdjfkHM5FQPcyM.heriKG9=_7331_ Content-Type: text/plain; charset="utf-8" ------mxO_4HALYOJvr1vdRg0el_y50LUdjfkHM5FQPcyM.heriKG9=_7331_--