From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Michael Albinus Newsgroups: gmane.emacs.bugs Subject: bug#65324: "make check" hangs on NetBSD 9.3 Date: Thu, 14 Sep 2023 14:51:41 +0200 Message-ID: <87a5tolxya.fsf@gmx.de> References: <4712060.QObxxYdZWr@nimes> <23216019.sM9OFumVh5@nimes> <87fs3ip2eu.fsf@gmx.de> <2299121.ZuhQCC13oI@nimes> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="9128"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: 65324@debbugs.gnu.org, Stefan Kangas To: Bruno Haible Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Sep 14 14:52:26 2023 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qglpa-0002Ad-CJ for geb-bug-gnu-emacs@m.gmane-mx.org; 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Thu, 14 Sep 2023 14:51:42 +0200 In-Reply-To: <2299121.ZuhQCC13oI@nimes> (Bruno Haible's message of "Wed, 13 Sep 2023 21:17:25 +0200") X-Provags-ID: V03:K1:rf2CHOLS7zu+ld6MBmuqvx6CGPuUAOo8IJvrhG/NUvDylnEWRhe WfbhPEQHPQUgMaqkidXbxkpcMFP1rbQswaCfx1/cGEtlRZsLMJkMRkLzamkoPpE1Bmic7yL VX8P12BC+o6q3t2ZiXYy10JqS5mFI6twMv0lZYE01wMHUzV2FxsGjJEX3+TF93vC1og8AQQ 0NMsEI3DlR1yfPPLDAnhQ== UI-OutboundReport: notjunk:1;M01:P0:zeRKgOgb/nI=;YwJwHIELCdC5k6ecau4hIYYHIZ7 tDE+U9XocHFQM2ANS1Ed5MX1UyT7P4Y20I+XwKYFv+PlQ7gjZdtyiG9w19YtGKxgxtN52iFUt CJwAdBWz+FYMCDrY7xA2XOawiCJLnczZCCYUzxGSqWHqsXZvve9iXz4H8W9Y6XWvUBc3K9ETR RQNiUFnKrctBR3GLJs4g3guZOl4o9WvhJbpVMQe8QaLCN4YqcMraB3aP+BMbjiUVVTjdvTpek GP5YCDw3QXru2N9ZIoqqTjHI+ig/uwUrSEhQQnF+Q2dJ1D08YDtabQTzefu5TnnCOTJF/ujH5 EbipUK3I3ae80kA+li1UV3rwGm3C1p1aoYlqf3v6jsJ3mvbDgKQ4dUxRnMOWQRJsqJM4SAjkB gYZiE6s+mIAxvH2YiqSTzAwYaybX1z7uP4c9as4tQIBxTsHdcN5Wwl1/BIRR373Hu/fkgt9jR JnaN0tE6cDOBk/w7K+XUmkkPRdf1T46enIzZPIqc3HgiPjgf7msUQBGpMGKEquIu6brQTpiVo xUdOCXKdka+IF/2WPSUd9uYwoe/UABgYxu76ajEDzxgxcuJAhKh+BBkR1PsXnGIYXPE1iTRY8 teWbPFUm24RfoyYuD3p08FzEA1+00jGRGTOrGFdFLACltOV/5Luf3/+TAf/ryduK5zYA3fH8f KqOom7pnYWArUVmRJMg5EwZlZPfhPOeFTPrb5ugzBYhRaRJyHNfFWsbozKaJGYK8OssFAaSeS jTw1BUMqPQtMHQVvArD6K2AyuRG0VeX0ngpW2E2gSzxJ4IBNesB9+cuYrkjmglcuaIMr3UJV X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:270419 Archived-At: Bruno Haible writes: Hi Bruno, > With these two new files, the tramp part of "gmake check" terminates. > Find attached the log files. Thanks. I've pushed the fix to Emacs master. >> And NetBSD has restricted ressources, for example it >> reports PIPE_BUF being 512, where other systems report 4096 ... > > If your code and tests depend on the value of PIPE_BUF, that explains it. No, this special case doesn't depend on PIPE_BUF I believe. I've used PIPE_BUF as an example to compare NetBSD with Linux, because I have seen it in the traces, and because it it shows the more limited ressources on NetBSD. > Whereas the maximum command line length (according to the libtool configure > test) is: > checking the maximum length of command line arguments... 196608 > > The PIPE_BUF in POSIX [1] can be as low as 512 [2]. Here are the values > on various platforms: > - 512 on macOS, FreeBSD, NetBSD, OpenBSD, MirBSD, native Windows. > - 4 KiB on Linux, OSF/1, Cygwin, Haiku. > - 5 KiB on Solaris. > - 8 KiB on HP-UX, Plan9. > - 10 KiB on IRIX. > - 32 KiB on AIX, Minix. > > [1] https://pubs.opengroup.org/onlinepubs/9699919799/functions/write.html > [2] https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html Thanks to the explanation, much appreciated! >> such longuish file names shouldn't happen in the wild (I hope). > > But the problem is: > - It's not only NetBSD. It's all *BSDs that have a PIPE_BUF value of 512. I have an OpenBSD VM as test system, and it didn't show this error. And I didn't get a similar bug report yet from other users, for example users with macOS. But as said, I don't believe it is a PIPE_BUF problem. > - tramp seems not only to fail in this case, but to go into an endless loop, > which is much much worse. Yes. Tramp waits for a response from remote, which didn't arrive. One could thing about a timeout, but since Tramp sends arbitrary commands over arbitrary slow lines to arbitrary slow machines, I don't know of a proper value of such a timeout. Well, I believe we have nailed it for *this* bug report. OK for you if I close it? > Bruno Best regards, Michael.