From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0286C43381 for ; Wed, 13 Feb 2019 21:41:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C92F9222C9 for ; Wed, 13 Feb 2019 21:41:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394969AbfBMVlb (ORCPT ); Wed, 13 Feb 2019 16:41:31 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:41174 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732893AbfBMVla (ORCPT ); Wed, 13 Feb 2019 16:41:30 -0500 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x1DLchVs057890 for ; Wed, 13 Feb 2019 16:41:29 -0500 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2qmtjjhxdh-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 13 Feb 2019 16:41:28 -0500 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 13 Feb 2019 21:41:19 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x1DLfIjG7471430 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 13 Feb 2019 21:41:18 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 564F511C050; Wed, 13 Feb 2019 21:41:18 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4200211C058; Wed, 13 Feb 2019 21:41:17 +0000 (GMT) Received: from rapoport-lnx (unknown [9.148.207.163]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Wed, 13 Feb 2019 21:41:17 +0000 (GMT) Date: Wed, 13 Feb 2019 23:41:15 +0200 From: Mike Rapoport To: Christoph Hellwig Cc: Andrew Morton , Alexander Viro , Russell King , Catalin Marinas , Will Deacon , Guan Xuetao , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 7/8] initramfs: proide a generic free_initrd_mem implementation References: <20190213174621.29297-1-hch@lst.de> <20190213174621.29297-8-hch@lst.de> <20190213184139.GC15270@rapoport-lnx> <20190213184448.GB20399@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190213184448.GB20399@lst.de> User-Agent: Mutt/1.5.24 (2015-08-30) X-TM-AS-GCONF: 00 x-cbid: 19021321-0016-0000-0000-0000025622C8 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19021321-0017-0000-0000-000032B04C09 Message-Id: <20190213214114.GE15270@rapoport-lnx> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-02-13_12:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902130142 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 13, 2019 at 07:44:48PM +0100, Christoph Hellwig wrote: > On Wed, Feb 13, 2019 at 08:41:40PM +0200, Mike Rapoport wrote: > > csky seems to open-code free_reserved_page with the only > > difference that it's also increments totalram_pages for the freed pages, > > which doesn't seem correct anyway... > > > > That said, I suppose arch/csky can be also added to the party. > > Yes, I noticed that. But I'd rather move it over manually in > another patch post rc1 or for the next merge window. Fair enough. > > > +void __weak free_initrd_mem(unsigned long start, unsigned long end) > > > +{ > > > + free_reserved_area((void *)start, (void *)end, -1, "initrd"); > > > > Some architectures have pr_info("Freeing initrd memory..."), I'd add it for > > the generic version as well. > > Well, if we think such a printk is useful it should probably be > moved to the caller in init/initramfs.c instead. I can include a > patch for that in the next iteration of the series. I found it useful during board bring ups, this gave some starting point when everything hangs and you are out to catch the lion in the desert. > > Another thing that I was thinking of is that x86 has all those memory > > protection calls in its free_initrd_mem, maybe it'd make sense to have them > > in the generic version as well? > > Maybe. But I'd rather keep it out of the initial series as it looks > a little more complicated. Having a single implementation > of free_initrd_mem would be great, though. Ok. BTW, the memblock_free() arm64 does, seems to be relevant for architectures with CONFIG_ARCH_DISCARD_MEMBLOCK=n. On powerpc the freed initrd region shows up in /sys/kernel/debug/memblock/reserved. -- Sincerely yours, Mike.