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Tue, 19 Aug 2025 02:22:55 -0700 (PDT) Date: Tue, 19 Aug 2025 09:22:54 +0000 From: Wei Yang To: David Hildenbrand Cc: Mike Rapoport , linux-mm@kvack.org, Andrew Morton , Bill Wendling , Daniel Jordan , Justin Stitt , Michael Ellerman , Miguel Ojeda , Nathan Chancellor , Nick Desaulniers , linux-kernel@vger.kernel.org, llvm@lists.linux.dev Subject: Re: [PATCH 3/4] mm/mm_init: drop deferred_init_maxorder() Message-ID: <20250819092254.cddlg6npwl75fvbn@master> Reply-To: Wei Yang References: <20250818064615.505641-1-rppt@kernel.org> <20250818064615.505641-4-rppt@kernel.org> <408d7eaa-5aea-4490-9fd0-978c4eb94d32@redhat.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <408d7eaa-5aea-4490-9fd0-978c4eb94d32@redhat.com> User-Agent: NeoMutt/20170113 (1.7.2) On Tue, Aug 19, 2025 at 09:54:22AM +0200, David Hildenbrand wrote: >> -static unsigned long __init >> -deferred_init_memmap_chunk(unsigned long start_pfn, unsigned long end_pfn, >> - struct zone *zone) >> -{ >> - unsigned long nr_pages = 0; >> - unsigned long spfn, epfn; >> - u64 i = 0; >> + while (spfn < epfn) { >> + unsigned long mo_pfn = ALIGN(spfn + 1, MAX_ORDER_NR_PAGES); >> + unsigned long chunk_end = min(mo_pfn, epfn); >> - deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn, start_pfn); >> + nr_pages += deferred_init_pages(zone, spfn, chunk_end); >> + deferred_free_pages(spfn, chunk_end - spfn); > > >I assume the expectation is that all PFNs in the start_pfn -> end_pfn range >will go to this zone, correct? I think so. defer_init only apply to the highest zone in one node. > >-- >Cheers > >David / dhildenb > -- Wei Yang Help you, Help me