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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5E5B5D2ECF7 for ; Tue, 20 Jan 2026 13:06:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5HTjNG1Xvuo8jqOgb9lzEtQALllJNhz/Zohl7pFn+bU=; b=Ta3u/iK3RbUwYRJULIjpg43VJs f7NAclUe3JlUAaStxvkReso/7SVS0heHrh9a3GSVqLi7sSfitfrCNRMDY+PhaC+Dg8hmwLtPwko5l lE2NDTjfZKe2r2qTLF7JhRzT9bwZXiOnsS9Ce/E8nXmEi6g2+7lF6Zou6WnADRUHhBKEW8oKPaJUh rfPFvqfBvCGXEMTm+039MKrVlr9s36grOAKzIdriJoH7GvXW05kbJExDXMvM4ZkjmSEhMgAaAu96b +/7AXvTFTLlUQC72WEW1lQdnpkohn8J+gKKRXtVMgaBWQpZKaL1OWcMjPFezVtHyz+egIUemDHUFr 61d7GQWQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1viBRN-00000003tB2-2f01; Tue, 20 Jan 2026 13:06:37 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1viBRM-00000003tAv-1bwG for kexec@lists.infradead.org; Tue, 20 Jan 2026 13:06:36 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 74FCF60018; Tue, 20 Jan 2026 13:06:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23520C16AAE; Tue, 20 Jan 2026 13:06:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768914395; bh=rERhQa1jZykoq4PB899x/lK9oiqVu+OrztuGSTog//s=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Z+19VGW689YQmfWzj3ws0xOaW1zvWCBaLeDwyOtrCW/QsH7JreF9icWorSeBkmMLm wHoxMCxl8Dg3oIpmElK2vJr74pnxB2DA/ebUS0FIepbIVXKfAZTy0IyCznsd6sY7a9 4SO5+2Je1YUSglE89KLJdEGJUdp+SuFt5KDobPMjIxamW3ol4YyJCmzghmcmUWc0tp HEW+Joe4fGhn0gfxKC6TkO/vdylolOqcDsta2xp8IZ3UqJlcA/4Q5B3573slxqg0Cv TmXA0ah/tHDPUAfB090eZhZfGcZJ6fFNAw7BoxQNFsmVtENhB0quEZPwr8ghmHKVQV Pm/SLNhnO0E3A== Date: Tue, 20 Jan 2026 15:06:28 +0200 From: Mike Rapoport To: Andrew Morton Cc: Pratyush Yadav , Alexander Graf , Pasha Tatashin , kexec@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Suren Baghdasaryan Subject: Re: [PATCH v2 1/2] kho: use unsigned long for nr_pages Message-ID: References: <20260116112217.915803-1-pratyush@kernel.org> <20260116112217.915803-2-pratyush@kernel.org> <20260116142635.b90464ed9772c146a9842370@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260116142635.b90464ed9772c146a9842370@linux-foundation.org> X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On Fri, Jan 16, 2026 at 02:26:35PM -0800, Andrew Morton wrote: > On Fri, 16 Jan 2026 11:22:14 +0000 Pratyush Yadav wrote: > > > With 4k pages, a 32-bit nr_pages can span up to 16 TiB. While it is a > > lot, there exist systems with terabytes of RAM. gup is also moving to > > using long for nr_pages. Use unsigned long and make KHO future-proof. > > We can expect people to be using LTS kernel five years from now, > perhaps much longer. Machines will be bigger then! > > IOW, shouldn't we backport this? The latest LTS is 6.12 that still does not have KHO, I don't think it makes sense to backport this to 6.18. -- Sincerely yours, Mike.