From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 5B3EE17BB0D for ; Tue, 14 May 2024 20:49:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=140.211.166.138 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715719791; cv=none; b=UAryFkHlR9wT2GOC2Hbs0FyjFMyaha0peAnt9TqvAXwebUt7vzQtPH0H2nbFPlJbVTfn1fvlBkOG42FGXUD0VJahooct2Ky6n6/hT2YIml56a5HzHHAdc2L2Mrvu9/tToHM0cas6rbDlv1vNQDGOyWB0Rg3fXy9lGTQI5odbNcQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715719791; c=relaxed/simple; bh=JWldUvsrnIWGGZLfJMS4s8rA7OagaQQUPi1HdgCX6b8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=HUJh2yoi5gGDzDx1umI5t5McgxLZgk6vjE3oeThxq/btgDX7kONgmjkMUUf/BOJG33O9oczG+xSqlPbEEE89iUhM9G+l8eF+ikud2FduezrBCvuVl4+V8mJ+31e7QFgoRWEFCeiCnJvOJO5u5RZgk/Ib5GGVt7Oz15oO0UZHbxU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b=mKTR+aaK; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b=k9frE569; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b=mKTR+aaK; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b=k9frE569; arc=none smtp.client-ip=140.211.166.138 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="mKTR+aaK"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="k9frE569"; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="mKTR+aaK"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="k9frE569" Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id E9B7781FDC for ; Tue, 14 May 2024 20:49:49 +0000 (UTC) X-Virus-Scanned: amavis at osuosl.org X-Spam-Flag: NO X-Spam-Score: -4.4 X-Spam-Level: Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavis, port 10024) with ESMTP id knyI6cMsEQDQ for ; Tue, 14 May 2024 20:49:49 +0000 (UTC) X-Greylist: delayed 1016 seconds by postgrey-1.37 at util1.osuosl.org; Tue, 14 May 2024 20:49:48 UTC DMARC-Filter: OpenDMARC Filter v1.4.2 smtp1.osuosl.org 05E0B81EB4 Authentication-Results: smtp1.osuosl.org; dmarc=pass (p=none dis=none) header.from=suse.de DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.osuosl.org 05E0B81EB4 Authentication-Results: smtp1.osuosl.org; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=mKTR+aaK; dkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=k9frE569; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=mKTR+aaK; dkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=k9frE569 Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=195.135.223.131; helo=smtp-out2.suse.de; envelope-from=osalvador@suse.de; receiver= Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) by smtp1.osuosl.org (Postfix) with ESMTPS id 05E0B81EB4 for ; Tue, 14 May 2024 20:49:48 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 862361FB6C; Tue, 14 May 2024 20:49:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1715719786; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=G8/TImExnPcn0/P4PnWsqrauOrC1YnmySZaU3kuuKQg=; b=mKTR+aaKzODX7Bm5w+mkknOuaO+jQQbCeLDym0is6AC8PmHYyN73dBi0/hYTnEDofuxj8I Kx6PgXdk12mRN2ld6Yd4E5D27Hlf5mWPJFCGPgE+QXWp915yIRKXeXXDemrCc4ZBJYCb1k WOoKWXyX5jM/nzSiNnnqm5xz7ai09fQ= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1715719786; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=G8/TImExnPcn0/P4PnWsqrauOrC1YnmySZaU3kuuKQg=; b=k9frE569ZnCt5JYUlUd2v5N4OV51TvkKRoEmTpdpMQ2eEuLOUzTKFZAGFr82Xh1MKEl6Qr 0iBt6+BWhUaPkCDg== Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1715719786; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=G8/TImExnPcn0/P4PnWsqrauOrC1YnmySZaU3kuuKQg=; b=mKTR+aaKzODX7Bm5w+mkknOuaO+jQQbCeLDym0is6AC8PmHYyN73dBi0/hYTnEDofuxj8I Kx6PgXdk12mRN2ld6Yd4E5D27Hlf5mWPJFCGPgE+QXWp915yIRKXeXXDemrCc4ZBJYCb1k WOoKWXyX5jM/nzSiNnnqm5xz7ai09fQ= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1715719786; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=G8/TImExnPcn0/P4PnWsqrauOrC1YnmySZaU3kuuKQg=; b=k9frE569ZnCt5JYUlUd2v5N4OV51TvkKRoEmTpdpMQ2eEuLOUzTKFZAGFr82Xh1MKEl6Qr 0iBt6+BWhUaPkCDg== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 92F761372E; Tue, 14 May 2024 20:49:45 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id F3YiIWnOQ2aMJAAAD6G6ig (envelope-from ); Tue, 14 May 2024 20:49:45 +0000 Date: Tue, 14 May 2024 22:49:44 +0200 From: Oscar Salvador To: =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= Cc: Alexandre Ghiti , Albert Ou , David Hildenbrand , Palmer Dabbelt , Paul Walmsley , linux-riscv@lists.infradead.org, =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= , Andrew Bresticker , Chethan Seshadri , Lorenzo Stoakes , Santosh Mamila , Sivakumar Munnangi , Sunil V L , linux-kernel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH v2 4/8] riscv: mm: Add memory hotplugging support Message-ID: References: <20240514140446.538622-1-bjorn@kernel.org> <20240514140446.538622-5-bjorn@kernel.org> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20240514140446.538622-5-bjorn@kernel.org> X-Spamd-Result: default: False [-2.63 / 50.00]; BAYES_HAM(-1.33)[90.33%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; MISSING_XM_UA(0.00)[]; RCPT_COUNT_TWELVE(0.00)[17]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[rivosinc.com,eecs.berkeley.edu,redhat.com,dabbelt.com,sifive.com,lists.infradead.org,catalinasystems.io,gmail.com,ventanamicro.com,vger.kernel.org,kvack.org,lists.linux-foundation.org]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_DN_SOME(0.00)[] On Tue, May 14, 2024 at 04:04:42PM +0200, Björn Töpel wrote: > +static void __meminit free_vmemmap_storage(struct page *page, size_t size, > + struct vmem_altmap *altmap) > +{ > + if (altmap) > + vmem_altmap_free(altmap, size >> PAGE_SHIFT); > + else > + free_pages((unsigned long)page_address(page), get_order(size)); David already pointed this out, but can check arch/x86/mm/init_64.c:free_pagetable(). You will see that we have to do some magic for bootmem memory (DIMMs which were not hotplugged but already present) > +#ifdef CONFIG_SPARSEMEM_VMEMMAP > +void __ref vmemmap_free(unsigned long start, unsigned long end, struct vmem_altmap *altmap) > +{ > + remove_pgd_mapping(start, end, true, altmap); > +} > +#endif /* CONFIG_SPARSEMEM_VMEMMAP */ > +#endif /* CONFIG_MEMORY_HOTPLUG */ I will comment on the patch where you add support for hotplug and the dependency, but on a track in LSFMM today, we decided that most likely we will drop memory-hotplug support for !CONFIG_SPARSEMEM_VMEMMAP environments. So, since you are adding this plain fresh, please consider to tight the hotplug dependency to CONFIG_SPARSEMEM_VMEMMAP. As a bonus, you will only have to maintain one flavour of functions. -- Oscar Salvador SUSE Labs