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identity=mailfrom; envelope-from="miller@hamnavoe.com"; helo=balrog.mythic-beasts.com; client-ip=46.235.227.24 Received: from balrog.mythic-beasts.com (balrog.mythic-beasts.com [46.235.227.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tb-mx0.topicbox.com (Postfix) with ESMTPS for <9fans@9fans.net>; Tue, 26 Oct 2021 05:22:40 -0400 (EDT) (envelope-from miller@hamnavoe.com) Received: from [88.97.27.83] (port=35026 helo=hamnavoe.com) by balrog.mythic-beasts.com with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.92.3) (envelope-from ) id 1mfIfD-0005tn-Gb for 9fans@9fans.net; Tue, 26 Oct 2021 10:22:39 +0100 Message-ID: To: 9fans@9fans.net Subject: Re: [9fans] v9fs vs mmap (not quite SOLVED) From: Richard Miller <9fans@hamnavoe.com> Date: Tue, 26 Oct 2021 10:22:34 +0100 In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-BlackCat-Spam-Score: 1 Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: 4755e304-363e-11ec-b96d-fdba04c38018 Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UYjA2NWY0ZGY2N2E4YmFiOS1NYjZiMzQ4MTJkZTY3NTZlZGEzMGQy?= =?UTF-8?B?NjY1Pg==?= List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:Mb6b34812de6756eda30d2665:1:XDKw_6qPqjkRWVJy4pxNQ0R8JXesgMM8xIxWnrK_lj8 > what you did was compile pprof (not shown...) great!, and then when you r= an > it, > it failed... on the same machine?? but surely a cross plan 9, cross > compiler/lnker/env > is for getting plan 9 binaries going... > or is your prompt modified?? I'll annotate the error message a bit for clarification: > Building packages and commands for host, linux/amd64. The failure occurred while building all of go for linux, on linux. > # cmd/vendor/github.com/google/pprof/third_party/d3 This output line reports which package was being built when the failure occ= urred. > unexpected fault address 0x607c60 > fatal error: fault > [signal SIGBUS: bus error code=3D0x2 addr=3D0x607c60 pc=3D0x607c60] There was a memory fault related to address 0x607c60 which is the same as the program counter, suggesting the fault was a failure to fetch the instruction at that address. > goroutine 1 [running]: > runtime.throw({0xce1702, 0xc00008d870}) > /sys/lib/go1.17/src/runtime/panic.go:1198 +0x71 fp=3D0xc00008d828 > sp=3D0xc00008d7f8 pc=3D0x435331 > runtime.sigpanic() > /sys/lib/go1.17/src/runtime/signal_unix.go:732 +0x125 > fp=3D0xc00008d878 sp=3D0xc00008d828 pc=3D0x44b325 > cmd/compile/internal/typecheck.(*iexporter).pushDecl(0xc6e9c0, > 0xc0000a2120) > /sys/lib/go1.17/src/cmd/compile/internal/typecheck/iexport.go:403 > ... > cmd/compile/internal/gc.Main(0xd16458) > /sys/lib/go1.17/src/cmd/compile/internal/gc/main.go:307 +0x105b > fp=3D0xc00008df20 sp=3D0xc00008dc98 pc=3D0xc0495b > main.main() > /sys/lib/go1.17/src/cmd/compile/main.go:55 +0xdd fp=3D0xc00008df80 The go runtime traceback suggests that the running binary is the go compile= r, which is being executed from the v9fs file system on the Plan 9 server. The pc value 0x607c60 is within the text segment of the program, so I'm guessing there was some problem fetching the page, which the linux kernel reports as a "bus error" (a generic term for "something went wrong related to memory"). There's plenty of disk space on the server. ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Tb065f4df67a8bab9-Mb6b34= 812de6756eda30d2665 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription