From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751661AbbJLKWf (ORCPT ); Mon, 12 Oct 2015 06:22:35 -0400 Received: from mout.kundenserver.de ([212.227.17.24]:58875 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751231AbbJLKWd (ORCPT ); Mon, 12 Oct 2015 06:22:33 -0400 From: Arnd Bergmann To: yalin wang Cc: linux@arm.linux.org.uk, ard.biesheuvel@linaro.org, will.deacon@arm.com, nico@linaro.org, keescook@chromium.org, catalin.marinas@arm.com, victor.kamensky@linaro.org, msalter@redhat.com, vladimir.murzin@arm.com, ggdavisiv@gmail.com, paul.gortmaker@windriver.com, mingo@kernel.org, rusty@rustcorp.com.au, mcgrof@suse.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, n-horiguchi@ah.jp.nec.com, aarcange@redhat.com, mhocko@suse.com, jack@suse.cz, iamjoonsoo.kim@lge.com, xiexiuqi@huawei.com, vbabka@suse.cz, Vineet.Gupta1@synopsys.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC] arm: add __initbss section attribute Date: Mon, 12 Oct 2015 12:21:16 +0200 Message-ID: <8530796.1MzFUDEUSY@wuerfel> User-Agent: KMail/4.11.5 (Linux/3.16.0-10-generic; KDE/4.11.5; x86_64; ; ) In-Reply-To: <1444622356-8263-1-git-send-email-yalin.wang2010@gmail.com> References: <1444622356-8263-1-git-send-email-yalin.wang2010@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Provags-ID: V03:K0:x7ukcCIn++7ZJK4GyD2Nr0giYRu2h1/DG1LS81mobVzOmlQT4J8 2eHhJlwusQ5bVXpSEg2HgVFNmhoFxPXo+AAC5SsXqdIHXWebL7FwHNqgdGLFQiyGrAlub4y h/2F1r3qyxRQOupbmDT72UZdvgkIuv6d0Lx/IFJdxc5of8j41UYGwclTnD4oPtjAODWyvOt 2IxbcWh/t4+WqznGbwdIg== X-UI-Out-Filterresults: notjunk:1;V01:K0:DLQD6uTJW24=:uVwv+G507yUugiRD+ObkT7 7xNFRNyVFrZ43+GsziKKKn+OgXzACjJ4REARunADXU/6r/8KvDGfu07mH6kj6VHe0qR1OaxJ/ T+YCGrtc2x1g2dmPx72J7hRYEAfrqtxFU9Twn7jARwVEYNSoksAHfmZa5oY8PdgZTRmZYUMy3 KylTzE3GTahN7Mtlxif0pzzbUAyghhwZIMvELaWPM1Pg8l34DIjgNHwktv38OjYrx4OYIaNin K3NP+ofn3Hl+3/ZxzgHWInAVWaxXb5GVNtNDVMtzbRu4c3ju+8SAgO0yOjvPirviz7fZW+fqI txeF0c9dYNTOSGDLquNZvcoWRqF2xkWn8Ev7NWrB2K6Vw8SZqriJ5AJ6CyLCP4vjnKy2VhvqF 1SdI3R6hcsocDUwWaXashd7NhwazWZu5ZOpZo8ca9UV7YnA08g0JXeAB+UgHSibo/woz3D9qo fRZrMsGvW4KyrBKq2jnh3ItGsugciGnA1fB4PnF04GdCM7qtx+cbOBqCzeQLt3/9ideOo4f8J O7IWo2ytJYfE7GgthwU7MB0qB2yL9k5TgD5Hh7NLz3EC3sR54XCR+QWsEUCF26JUUJsga/7NN IAxGTFz7e9iDiWFYxIWL665XXV4E6QOmlVtHtvqwegw84BdGzTa863rqmgujFIcXlgX089XI2 hwJMv6Bmh0w7/Zuci/aXlMA/Ux5FAAFxJRx0P8UkOlvX7c9ywRA6eIiHh8MwM4Bq1coeZGMyr NAsvowqC6mybNJIc Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Monday 12 October 2015 11:59:16 yalin wang wrote: > This attribute can make init data to be into .initbss section, > this will make the data to be NO_BITS in vmlinux, can shrink the > Image file size, and speed up the boot up time. > > Signed-off-by: yalin wang Do you have an estimate of how much it gains? In multi_v7_defconfig, I see a total of 3367 symbols with 406016 bytes init.data, but only 348 bytes of those are in zero-initialized symbols. Arnd