From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <547779CF.3080903@siemens.com> Date: Thu, 27 Nov 2014 20:21:51 +0100 From: Jan Kiszka MIME-Version: 1.0 References: <54775097.30705@siemens.com> <20141127181823.GK7842@hermes> <547772AF.108@siemens.com> <20141127185603.GM7842@hermes> In-Reply-To: <20141127185603.GM7842@hermes> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] [pull] forge: Adjust default registry mount point List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: Xenomai On 2014-11-27 19:56, Gilles Chanteperdrix wrote: > On Thu, Nov 27, 2014 at 07:51:27PM +0100, Jan Kiszka wrote: >> On 2014-11-27 19:18, Gilles Chanteperdrix wrote: >>> On Thu, Nov 27, 2014 at 05:25:59PM +0100, Jan Kiszka wrote: >>>> The following changes since commit c13ff82ac09f6daa94778dcd8b51902efd754f3d: >>>> >>>> rtnet: update at91_ether driver (2014-11-16 20:06:04 +0100) >>>> >>>> are available in the git repository at: >>>> >>>> git://git.xenomai.org/xenomai-jki.git for-forge >>>> >>>> for you to fetch changes up to d36ae28f9c0549c0af66e896711dde21ea769587: >>>> >>>> regd: Switch to tmpfs as default (2014-11-27 17:19:33 +0100) >>> >>> According to the filesystem hierarchy standard, /mnt is the standard >>> place for "temporarily mounted filesystems". >>> >>> http://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard >> >> Right, another reason to NOT mess around with it: if something was >> temporarily mounted there, we will create the mountpoint inside that >> filesystem with unforeseeable side effects. > > Note the plural: filesystemS > It is very very very common to have multiple directories in /mnt and > mount filesytems in there. > >> >>> >>> /run is a deviation to the standard, and does not seem to be >>> indicated as a mount point (though debian mounts things there). >> >> "Modern" distros do, according to that article, so I suppose the >> majority. It's about to become standard. >> >>> >>> The standard equivalent of /run would be /var/run. >>> >>> But why do we need to change that globally, is not this configurable? >> >> We must stop writing to potentially read-only and/or non-local >> directories. If it's /run or /var/run, I don't care too much. > > Your change currently breaks Xenomai with the tool I, Philippe and > Jorge are using to test xenomai on the platforms I have at home. So, > there better be a good reason, and that does not look like one. If > you want mnt to be a tmpfs, then make it one, who is stopping you > from doing it ? /mnt existed before Xenomai 3 came around, so the latter has to accept the rules, not the former. We must fix this default behaviour before release. Again, if /var/run is preferred, I'll change the commit, but /mnt is an absolute no-go. Jan -- Siemens AG, Corporate Technology, CT RTC ITP SES-DE Corporate Competence Center Embedded Linux