Your message dated Sun, 3 Aug 2008 09:04:12 +0300 with message-id <20080803060411.GA6255@deprecation.cyrius.com> and subject line Re: Bug#397616: /proc/cpu/alignment should default to warn and fixup on arm has caused the Debian Bug report #397616, regarding [arm] /proc/cpu/alignment should default to warn and fixup on arm to be marked as done. This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact owner@bugs.debian.org immediately.) -- 397616: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=397616 Debian Bug Tracking System Contact owner@bugs.debian.org with problems
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- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: /proc/cpu/alignment should default to warn and fixup on arm
- From: Sjoerd Simons <sjoerd@debian.org>
- Date: Wed, 08 Nov 2006 14:02:53 +0100
- Message-id: <20061108130253.22796.26690.reportbug@jupiter.luon.net>
Package: linux-2.6 Severity: normal Hi, By default the ARM kernel just ignores unaligned accesses from userspace and can just accesses another address then actually specified. This can cause strange behaviour by userspace programs. While i agree that these programs are somewhat buggy, but doing something undefined and not telling anyone doesn't seem like a good strategy :) Some discussion on #debian-arm indicates that it the current default made some sense in the old days. Where some programs actually relied on the behaviour and the amount of buggy programs was so big that it actually caused a flood of warnings. Times have changed though, no applications in debian should depend on this behaviour and turning on warn+fixup doesn't seem cause a flood anymore. Most problemeatic should have been fixed by now, as on Sparc you'll get a sigbus on unaligned access and iirc Alpha gives a warning about it. For reference, i discovered this issue because powerdns on my arm was giving out weird SOA records. So enabling fixup does solves real problems or at least shows where they are :) (Yes i've already patched pdns and will be sending the patch out after some more testing) Sjoerd -- System Information: Debian Release: testing/unstable APT prefers testing APT policy: (500, 'testing'), (101, 'unstable') Architecture: arm (armv5tel) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.18-1-iop32x Locale: LANG=C, LC_CTYPE=nl_NL (charmap=ISO-8859-1)
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--- Begin Message ---
- To: Riku Voipio <riku.voipio@iki.fi>
- Cc: Sjoerd Simons <sjoerd@debian.org>, 397616-done@bugs.debian.org
- Subject: Re: Bug#397616: /proc/cpu/alignment should default to warn and fixup on arm
- From: Martin Michlmayr <tbm@cyrius.com>
- Date: Sun, 3 Aug 2008 09:04:12 +0300
- Message-id: <20080803060411.GA6255@deprecation.cyrius.com>
- In-reply-to: <20080506154020.GC4764@deprecation.cyrius.com>
- References: <20061108130253.22796.26690.reportbug@jupiter.luon.net> <20080425081208.GJ2623@deprecation.cyrius.com> <20080504190747.GA20627@kos.to> <20080506154020.GC4764@deprecation.cyrius.com>
* Martin Michlmayr <tbm@cyrius.com> [2008-05-06 17:40]: > > 2) warnings can cause bad side-effects (imagine a unaligned > > error in sysklogd..) > > http://thread.gmane.org/gmane.linux.ports.arm.kernel/34044 > > I think that's a good argument for not changing the upstream default. > So I think we should close this bug report and someone should take > this up with upstream (not me). Any volunteers? Someone tried to raise this with upstream recently; here's the reply: http://lists.arm.linux.org.uk/lurker/message/20080801.160843.c7b80fb6.en.html Closing this bug report. -- Martin Michlmayr http://www.cyrius.com/
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