From mboxrd@z Thu Jan 1 00:00:00 1970 From: hejianet@gmail.com (Jia He) Date: Mon, 2 Apr 2018 16:15:09 +0800 Subject: [PATCH v5 5/5] mm: page_alloc: reduce unnecessary binary search in early_pfn_valid() In-Reply-To: References: <1522636236-12625-1-git-send-email-hejianet@gmail.com> <1522636236-12625-6-git-send-email-hejianet@gmail.com> Message-ID: <75088758-f59c-c65a-6e88-116c1e6b6675@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 4/2/2018 3:00 PM, Ard Biesheuvel Wrote: > How much does it improve the performance? And in which cases? > > I guess it improves boot time on systems with physical address spaces > that are sparsely populated with DRAM, but you really have to quantify > this if you want other people to care. Yes, I write the performance in patch 0/5. I will write it in the patch description later. -- Cheers, Jia