From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: + =?US-ASCII?Q?mm-sparsec-use-kvmalloc-kvfree-to-alloc-free-memmap-for-the-?= =?US-ASCII?Q?classic-sparse.patch?= added to -mm tree Date: Fri, 20 Mar 2020 19:48:52 -0700 Message-ID: <20200321024852.XqdZcVhkd%akpm@linux-foundation.org> References: <20200305222751.6d781a3f2802d79510941e4e@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Return-path: Received: from mail.kernel.org ([198.145.29.99]:60526 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727333AbgCUCsx (ORCPT ); Fri, 20 Mar 2020 22:48:53 -0400 In-Reply-To: <20200305222751.6d781a3f2802d79510941e4e@linux-foundation.org> Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: bhe@redhat.com, david@redhat.com, mhocko@kernel.org, mhocko@suse.com, mm-commits@vger.kernel.org, pankaj.gupta.linux@gmail.com, willy@infradead.org The patch titled Subject: mm/sparse.c: use kvmalloc/kvfree to alloc/free memmap for the classic sparse has been added to the -mm tree. Its filename is mm-sparsec-use-kvmalloc-kvfree-to-alloc-free-memmap-for-the-classic-sparse.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-sparsec-use-kvmalloc-kvfree-to-alloc-free-memmap-for-the-classic-sparse.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-sparsec-use-kvmalloc-kvfree-to-alloc-free-memmap-for-the-classic-sparse.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Baoquan He Subject: mm/sparse.c: use kvmalloc/kvfree to alloc/free memmap for the classic sparse This change makes populate_section_memmap()/depopulate_section_memmap much simpler. Link: http://lkml.kernel.org/r/20200316125450.GG3486@MiWiFi-R3L-srv Signed-off-by: Baoquan He Suggested-by: Michal Hocko Reviewed-by: David Hildenbrand Acked-by: Michal Hocko Reviewed-by: Pankaj Gupta Reviewed-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton --- mm/sparse.c | 27 +++------------------------ 1 file changed, 3 insertions(+), 24 deletions(-) --- a/mm/sparse.c~mm-sparsec-use-kvmalloc-kvfree-to-alloc-free-memmap-for-the-classic-sparse +++ a/mm/sparse.c @@ -664,35 +664,14 @@ static void free_map_bootmem(struct page struct page * __meminit populate_section_memmap(unsigned long pfn, unsigned long nr_pages, int nid, struct vmem_altmap *altmap) { - struct page *page, *ret; - unsigned long memmap_size = sizeof(struct page) * PAGES_PER_SECTION; - - page = alloc_pages(GFP_KERNEL|__GFP_NOWARN, get_order(memmap_size)); - if (page) - goto got_map_page; - - ret = vmalloc(memmap_size); - if (ret) - goto got_map_ptr; - - return NULL; -got_map_page: - ret = (struct page *)pfn_to_kaddr(page_to_pfn(page)); -got_map_ptr: - - return ret; + return kvmalloc(array_size(sizeof(struct page), + PAGES_PER_SECTION), GFP_KERNEL); } static void depopulate_section_memmap(unsigned long pfn, unsigned long nr_pages, struct vmem_altmap *altmap) { - struct page *memmap = pfn_to_page(pfn);