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 1917FC47DA9 for ; Mon, 29 Jan 2024 11:42:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=lq5BrJ7jq67y1VSD9vQ9uN/UBZPyKjY6CjUuvbxrYJY=; b=GiaK7SZ8zA99VI WMNdZScdUHh98QXcFsrP7NA9EYCS5pHgnMGfMMZY4GKdefn9RaORrCd9RHtzMwlrzwg/DxN18QB8z 1/8V+tOgpOt32nVfNFPnJN8WRaZPRoT/kIdtmZ1WDjmzVT/u3w9A6smhp4MaO77Z9VTbBdHJYiH2v fi0USw4cnGIatOthYN0pV4c6M/L3kwDzfdx5UvREfrTWbepImIyEl/RFtBy/dbO97XHxG3ZccMZao 814MUF4EgzrevGYEIkHi43WJ5cKnP6e4TFzTMDT4wYpYfebHgaeWb37lNFuyaQ9Ll0N/Z+JqxonTf gUQkB7nijzV2DWXkrvSw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUQ1k-0000000CQgh-1ZNt; Mon, 29 Jan 2024 11:42:12 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUQ1i-0000000CQfb-0QTn for linux-arm-kernel@lists.infradead.org; Mon, 29 Jan 2024 11:42:11 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id AEEA71FB; Mon, 29 Jan 2024 03:42:47 -0800 (PST) Received: from raptor (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 86CCD3F5A1; Mon, 29 Jan 2024 03:41:58 -0800 (PST) Date: Mon, 29 Jan 2024 11:41:55 +0000 From: Alexandru Elisei To: Anshuman Khandual Cc: catalin.marinas@arm.com, will@kernel.org, oliver.upton@linux.dev, maz@kernel.org, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, arnd@arndb.de, akpm@linux-foundation.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, mhiramat@kernel.org, rppt@kernel.org, hughd@google.com, pcc@google.com, steven.price@arm.com, vincenzo.frascino@arm.com, david@redhat.com, eugenis@google.com, kcc@google.com, hyesoo.yu@samsung.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Subject: Re: [PATCH RFC v3 01/35] mm: page_alloc: Add gfp_flags parameter to arch_alloc_page() Message-ID: References: <20240125164256.4147-1-alexandru.elisei@arm.com> <20240125164256.4147-2-alexandru.elisei@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240129_034210_281440_017B4C0F X-CRM114-Status: GOOD ( 18.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On Mon, Jan 29, 2024 at 11:18:59AM +0530, Anshuman Khandual wrote: > > On 1/25/24 22:12, Alexandru Elisei wrote: > > Extend the usefulness of arch_alloc_page() by adding the gfp_flags > > parameter. > > Although the change here is harmless in itself, it will definitely benefit > from some additional context explaining the rationale, taking into account > why-how arch_alloc_page() got added particularly for s390 platform and how > it's going to be used in the present proposal. arm64 will use it to reserve tag storage if the caller requested a tagged page. Right now that means that __GFP_ZEROTAGS is set in the gfp mask, but I'll rename it to __GFP_TAGGED in patch #18 ("arm64: mte: Rename __GFP_ZEROTAGS to __GFP_TAGGED") [1]. [1] https://lore.kernel.org/lkml/20240125164256.4147-19-alexandru.elisei@arm.com/ Thanks, Alex > > > > > Signed-off-by: Alexandru Elisei > > --- > > > > Changes since rfc v2: > > > > * New patch. > > > > arch/s390/include/asm/page.h | 2 +- > > arch/s390/mm/page-states.c | 2 +- > > include/linux/gfp.h | 2 +- > > mm/page_alloc.c | 2 +- > > 4 files changed, 4 insertions(+), 4 deletions(-) > > > > diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h > > index 73b9c3bf377f..859f0958c574 100644 > > --- a/arch/s390/include/asm/page.h > > +++ b/arch/s390/include/asm/page.h > > @@ -163,7 +163,7 @@ static inline int page_reset_referenced(unsigned long addr) > > > > struct page; > > void arch_free_page(struct page *page, int order); > > -void arch_alloc_page(struct page *page, int order); > > +void arch_alloc_page(struct page *page, int order, gfp_t gfp_flags); > > > > static inline int devmem_is_allowed(unsigned long pfn) > > { > > diff --git a/arch/s390/mm/page-states.c b/arch/s390/mm/page-states.c > > index 01f9b39e65f5..b986c8b158e3 100644 > > --- a/arch/s390/mm/page-states.c > > +++ b/arch/s390/mm/page-states.c > > @@ -21,7 +21,7 @@ void arch_free_page(struct page *page, int order) > > __set_page_unused(page_to_virt(page), 1UL << order); > > } > > > > -void arch_alloc_page(struct page *page, int order) > > +void arch_alloc_page(struct page *page, int order, gfp_t gfp_flags) > > { > > if (!cmma_flag) > > return; > > diff --git a/include/linux/gfp.h b/include/linux/gfp.h > > index de292a007138..9e8aa3d144db 100644 > > --- a/include/linux/gfp.h > > +++ b/include/linux/gfp.h > > @@ -172,7 +172,7 @@ static inline struct zonelist *node_zonelist(int nid, gfp_t flags) > > static inline void arch_free_page(struct page *page, int order) { } > > #endif > > #ifndef HAVE_ARCH_ALLOC_PAGE > > -static inline void arch_alloc_page(struct page *page, int order) { } > > +static inline void arch_alloc_page(struct page *page, int order, gfp_t gfp_flags) { } > > #endif > > > > struct page *__alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid, > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > > index 150d4f23b010..2c140abe5ee6 100644 > > --- a/mm/page_alloc.c > > +++ b/mm/page_alloc.c > > @@ -1485,7 +1485,7 @@ inline void post_alloc_hook(struct page *page, unsigned int order, > > set_page_private(page, 0); > > set_page_refcounted(page); > > > > - arch_alloc_page(page, order); > > + arch_alloc_page(page, order, gfp_flags); > > debug_pagealloc_map_pages(page, 1 << order); > > > > /* > > Otherwise LGTM. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel