From patchwork Sat Feb 22 03:22:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Sandeen X-Patchwork-Id: 11397809 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2EDE91580 for ; Sat, 22 Feb 2020 03:22:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0B2D920722 for ; Sat, 22 Feb 2020 03:22:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726387AbgBVDWO (ORCPT ); Fri, 21 Feb 2020 22:22:14 -0500 Received: from sandeen.net ([63.231.237.45]:47420 "EHLO sandeen.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726032AbgBVDWO (ORCPT ); Fri, 21 Feb 2020 22:22:14 -0500 Received: from [10.0.0.4] (liberator [10.0.0.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by sandeen.net (Postfix) with ESMTPSA id 387B5F8B1E for ; Fri, 21 Feb 2020 21:21:54 -0600 (CST) Subject: [PATCH V3] libxfs: use FALLOC_FL_ZERO_RANGE in libxfs_device_zero From: Eric Sandeen To: linux-xfs References: <4bc3be27-b09d-a708-f053-6f7240642667@sandeen.net> Autocrypt: addr=sandeen@sandeen.net; prefer-encrypt=mutual; keydata= mQINBE6x99QBEADMR+yNFBc1Y5avoUhzI/sdR9ANwznsNpiCtZlaO4pIWvqQJCjBzp96cpCs nQZV32nqJBYnDpBDITBqTa/EF+IrHx8gKq8TaSBLHUq2ju2gJJLfBoL7V3807PQcI18YzkF+ WL05ODFQ2cemDhx5uLghHEeOxuGj+1AI+kh/FCzMedHc6k87Yu2ZuaWF+Gh1W2ix6hikRJmQ vj5BEeAx7xKkyBhzdbNIbbjV/iGi9b26B/dNcyd5w2My2gxMtxaiP7q5b6GM2rsQklHP8FtW ZiYO7jsg/qIppR1C6Zr5jK1GQlMUIclYFeBbKggJ9mSwXJH7MIftilGQ8KDvNuV5AbkronGC sEEHj2khs7GfVv4pmUUHf1MRIvV0x3WJkpmhuZaYg8AdJlyGKgp+TQ7B+wCjNTdVqMI1vDk2 BS6Rg851ay7AypbCPx2w4d8jIkQEgNjACHVDU89PNKAjScK1aTnW+HNUqg9BliCvuX5g4z2j gJBs57loTWAGe2Ve3cMy3VoQ40Wt3yKK0Eno8jfgzgb48wyycINZgnseMRhxc2c8hd51tftK LKhPj4c7uqjnBjrgOVaVBupGUmvLiePlnW56zJZ51BR5igWnILeOJ1ZIcf7KsaHyE6B1mG+X dmYtjDhjf3NAcoBWJuj8euxMB6TcQN2MrSXy5wSKaw40evooGwARAQABtCVFcmljIFIuIFNh bmRlZW4gPHNhbmRlZW5Ac2FuZGVlbi5uZXQ+iQI7BBMBAgAlAhsDBgsJCAcDAgYVCAIJCgsE FgIDAQIeAQIXgAUCUzMzbAIZAQAKCRAgrhaS4T3e4Fr7D/wO+fenqVvHjq21SCjDCrt8HdVj aJ28B1SqSU2toxyg5I160GllAxEHpLFGdbFAhQfBtnmlY9eMjwmJb0sCIrkrB6XNPSPA/B2B UPISh0z2odJv35/euJF71qIFgWzp2czJHkHWwVZaZpMWWNvsLIroXoR+uA9c2V1hQFVAJZyk EE4xzfm1+oVtjIC12B9tTCuS00pY3AUy21yzNowT6SSk7HAzmtG/PJ/uSB5wEkwldB6jVs2A sjOg1wMwVvh/JHilsQg4HSmDfObmZj1d0RWlMWcUE7csRnCE0ZWBMp/ttTn+oosioGa09HAS 9jAnauznmYg43oQ5Akd8iQRxz5I58F/+JsdKvWiyrPDfYZtFS+UIgWD7x+mHBZ53Qjazszox gjwO9ehZpwUQxBm4I0lPDAKw3HJA+GwwiubTSlq5PS3P7QoCjaV8llH1bNFZMz2o8wPANiDx 5FHgpRVgwLHakoCU1Gc+LXHXBzDXt7Cj02WYHdFzMm2hXaslRdhNGowLo1SXZFXa41KGTlNe 4di53y9CK5ynV0z+YUa+5LR6RdHrHtgywdKnjeWdqhoVpsWIeORtwWGX8evNOiKJ7j0RsHha WrePTubr5nuYTDsQqgc2r4aBIOpeSRR2brlT/UE3wGgy9LY78L4EwPR0MzzecfE1Ws60iSqw Pu3vhb7h3bkCDQROsffUARAA0DrUifTrXQzqxO8aiQOC5p9Tz25Np/Tfpv1rofOwL8VPBMvJ X4P5l1V2yd70MZRUVgjmCydEyxLJ6G2YyHO2IZTEajUY0Up+b3ErOpLpZwhvgWatjifpj6bB SKuDXeThqFdkphF5kAmgfVAIkan5SxWK3+S0V2F/oxstIViBhMhDwI6XsRlnVBoLLYcEilxA 2FlRUS7MOZGmRJkRtdGD5koVZSM6xVZQSmfEBaYQ/WJBGJQdPy94nnlAVn3lH3+N7pXvNUuC GV+t4YUt3tLcRuIpYBCOWlc7bpgeCps5Xa0dIZgJ8Louu6OBJ5vVXjPxTlkFdT0S0/uerCG5 1u8p6sGRLnUeAUGkQfIUqGUjW2rHaXgWNvzOV6i3tf9YaiXKl3avFaNW1kKBs0T5M1cnlWZU Utl6k04lz5OjoNY9J/bGyV3DSlkblXRMK87iLYQSrcV6cFz9PRl4vW1LGff3xRQHngeN5fPx ze8X5NE3hb+SSwyMSEqJxhVTXJVfQWWW0dQxP7HNwqmOWYF/6m+1gK/Y2gY3jAQnsWTru4RV TZGnKwEPmOCpSUvsTRXsVHgsWJ70qd0yOSjWuiv4b8vmD3+QFgyvCBxPMdP3xsxN5etheLMO gRwWpLn6yNFq/xtgs+ECgG+gR78yXQyA7iCs5tFs2OrMqV5juSMGmn0kxJUAEQEAAYkCHwQY AQIACQUCTrH31AIbDAAKCRAgrhaS4T3e4BKwD/0ZOOmUNOZCSOLAMjZx3mtYtjYgfUNKi0ki YPveGoRWTqbis8UitPtNrG4XxgzLOijSdOEzQwkdOIp/QnZhGNssMejCnsluK0GQd+RkFVWN mcQT78hBeGcnEMAXZKq7bkIKzvc06GFmkMbX/gAl6DiNGv0UNAX+5FYh+ucCJZSyAp3sA+9/ LKjxnTedX0aygXA6rkpX0Y0FvN/9dfm47+LGq7WAqBOyYTU3E6/+Z72bZoG/cG7ANLxcPool LOrU43oqFnD8QwcN56y4VfFj3/jDF2MX3xu4v2OjglVjMEYHTCxP3mpxesGHuqOit/FR+mF0 MP9JGfj6x+bj/9JMBtCW1bY/aPeMdPGTJvXjGtOVYblGZrSjXRn5++Uuy36CvkcrjuziSDG+ JEexGxczWwN4mrOQWhMT5Jyb+18CO+CWxJfHaYXiLEW7dI1AynL4jjn4W0MSiXpWDUw+fsBO Pk6ah10C4+R1Jc7dyUsKksMfvvhRX1hTIXhth85H16706bneTayZBhlZ/hK18uqTX+s0onG/ m1F3vYvdlE4p2ts1mmixMF7KajN9/E5RQtiSArvKTbfsB6Two4MthIuLuf+M0mI4gPl9SPlf fWCYVPhaU9o83y1KFbD/+lh1pjP7bEu/YudBvz7F2Myjh4/9GUAijrCTNeDTDAgvIJDjXuLX pA== Message-ID: Date: Fri, 21 Feb 2020 21:22:12 -0600 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <4bc3be27-b09d-a708-f053-6f7240642667@sandeen.net> Content-Language: en-US Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org I had a request from someone who cared about mkfs speed(!) over a slower network block device to look into using faster zeroing methods, particularly for the log, during mkfs. Using FALLOC_FL_ZERO_RANGE is faster in this case than writing a bunch of zeros across a wire. Signed-off-by: Eric Sandeen --- V2: Clean up all the nasty stuff I'd flung out there as a wild first cut, thanks Dave. V3: make len_bytes a size_t; leave "end_offset" where it is for the loop use. It's a bit odd but ... just don't mess with it for now, one patch one change. diff --git a/include/builddefs.in b/include/builddefs.in index 4700b527..1dd27f76 100644 --- a/include/builddefs.in +++ b/include/builddefs.in @@ -144,6 +144,9 @@ endif ifeq ($(HAVE_GETFSMAP),yes) PCFLAGS+= -DHAVE_GETFSMAP endif +ifeq ($(HAVE_FALLOCATE),yes) +PCFLAGS += -DHAVE_FALLOCATE +endif LIBICU_LIBS = @libicu_LIBS@ LIBICU_CFLAGS = @libicu_CFLAGS@ diff --git a/include/linux.h b/include/linux.h index 8f3c32b0..8d5c4584 100644 --- a/include/linux.h +++ b/include/linux.h @@ -20,6 +20,10 @@ #include #include #include +#include +#if defined(HAVE_FALLOCATE) +#include +#endif #ifdef OVERRIDE_SYSTEM_FSXATTR # define fsxattr sys_fsxattr #endif @@ -164,6 +168,24 @@ static inline void platform_mntent_close(struct mntent_cursor * cursor) endmntent(cursor->mtabp); } +#if defined(FALLOC_FL_ZERO_RANGE) +static inline int +platform_zero_range( + int fd, + xfs_off_t start, + size_t len) +{ + int ret; + + ret = fallocate(fd, FALLOC_FL_ZERO_RANGE, start, len); + if (!ret) + return 0; + return -errno; +} +#else +#define platform_zero_range(fd, s, l) (-EOPNOTSUP) +#endif + /* * Check whether we have to define FS_IOC_FS[GS]ETXATTR ourselves. These * are a copy of the definitions moved to linux/uapi/fs.h in the 4.5 kernel, diff --git a/libxfs/rdwr.c b/libxfs/rdwr.c index 0d9d7202..e2d9d790 100644 --- a/libxfs/rdwr.c +++ b/libxfs/rdwr.c @@ -61,8 +61,18 @@ libxfs_device_zero(struct xfs_buftarg *btp, xfs_daddr_t start, uint len) { xfs_off_t start_offset, end_offset, offset; ssize_t zsize, bytes; + size_t len_bytes; char *z; - int fd; + int error, fd; + + fd = libxfs_device_to_fd(btp->dev); + start_offset = LIBXFS_BBTOOFF64(start); + + /* try to use special zeroing methods, fall back to writes if needed */ + len_bytes = LIBXFS_BBTOOFF64(len); + error = platform_zero_range(fd, start_offset, len_bytes); + if (!error) + return 0; zsize = min(BDSTRAT_SIZE, BBTOB(len)); if ((z = memalign(libxfs_device_alignment(), zsize)) == NULL) { @@ -73,9 +83,6 @@ libxfs_device_zero(struct xfs_buftarg *btp, xfs_daddr_t start, uint len) } memset(z, 0, zsize); - fd = libxfs_device_to_fd(btp->dev); - start_offset = LIBXFS_BBTOOFF64(start); - if ((lseek(fd, start_offset, SEEK_SET)) < 0) { fprintf(stderr, _("%s: %s seek to offset %llu failed: %s\n"), progname, __FUNCTION__,