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mx.microsoft.com 1; spf=pass smtp.mailfrom=cornell.edu; dmarc=pass action=none header.from=cornell.edu; dkim=pass header.d=cornell.edu; arc=none Received: from BN7PR04MB4388.namprd04.prod.outlook.com (2603:10b6:406:f8::19) by BN8PR04MB5474.namprd04.prod.outlook.com (2603:10b6:408:5a::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4478.19; Sat, 4 Sep 2021 22:37:37 +0000 Received: from BN7PR04MB4388.namprd04.prod.outlook.com ([fe80::b510:889b:1fd0:d80e]) by BN7PR04MB4388.namprd04.prod.outlook.com ([fe80::b510:889b:1fd0:d80e%7]) with mapi id 15.20.4478.025; Sat, 4 Sep 2021 22:37:37 +0000 Subject: mmap failure [was: cygrunsrv + sshd + rsync = 20 times too slow -- throttled?] To: cygwin@cygwin.com References: <789f056a-f164-d71d-1dc9-230f5a41846d@cornell.edu> <46906957-5850-4D7E-8D5A-EFF3C4068C0D@house.org> <58bdc0c3-d843-343f-d88e-c8a44ec33a15@cornell.edu> <3DB951FB-FC3F-4EE8-B5E0-6137B305B873@house.org> <72F25EBC-6801-4C96-8F6C-48F09B25B712@house.org> <6105153B-D145-449D-97FE-D6F17BEB2032@house.org> <6beb1156-931e-0380-ee60-2ca519f49a2f@cornell.edu> From: Ken Brown Message-ID: Date: Sat, 4 Sep 2021 18:37:35 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; 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int page_size = getpagesize (); addr = mmap (0, page_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (addr == MAP_FAILED) perror ("mmap"); } $ gcc mmap_test.c $ ./a mmap: Invalid argument This happens if I use cygwin1.dll built from the current git master. But it also happens if I build from cygwin-3_2_0-release with the recent patches applied that make Cygwin build without error: 0e12b4939 Cygwin: C++17: register keyword is deprecated a7340e0c0 Cygwin: dumper: fix up GCC pragma for g++ 11.2 2a212c086 Cygwin: workaround a g++ 11.2 initialization bug 9e3f1737e Cygwin: loader script: add DWARF 5 sections bdfd2b004 Cygwin: testsuite: avoid "conflicting types" gcc warning 6fc498e2e strstr: avoid warnings 26da270b2 ldexp/ldexpf: avoid assembler warning edce2a557 Cygwin: fix declaration of RtlInitEmptyUnicodeString So there appears to be something wrong with cygwin1.dll built with the current build tools (gcc 11.2.0, binutils 2.37, not sure what else is relevant). Ken