Date: Wed, 9 Feb 2011 21:25:22 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: Andre Albsmeier <Andre.Albsmeier@siemens.com> Cc: "freebsd-emulation@freebsd.org" <freebsd-emulation@freebsd.org> Subject: Re: 7.3-STABLE and Linux version of SIMetrix Message-ID: <20110209212522.00001cb8@unknown> In-Reply-To: <20110106104057.GB59969@curry.mchp.siemens.de> References: <20101230075124.GA12923@curry.mchp.siemens.de> <20101231144800.00005c6d@unknown> <20110101224629.GA30540@curry.mchp.siemens.de> <20110102115021.00000c8b@unknown> <20110105191915.GA43997@curry.mchp.siemens.de> <20110106090130.20784sf1w9verdic@webmail.leidinger.net> <20110106104057.GB59969@curry.mchp.siemens.de>
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On Thu, 6 Jan 2011 11:40:57 +0100 Andre Albsmeier <Andre.Albsmeier@siemens.com> wrote: > On Thu, 06-Jan-2011 at 09:01:30 +0100, Alexander Leidinger wrote: > > Quoting Andre Albsmeier <Andre.Albsmeier@siemens.com> (from Wed, 5 > > Jan 2011 20:19:15 +0100): > > > > > Got it running... A short explanation: > > > > > > Linux' shm_open() fails because it wants to find some funky shmfs > > > to construct the full pathname. It starts to search at the default > > > mountpoint which is /dev/shm. If this fails it runs through fstab > > > and searches for shmfs and tmpfs. Whatever it finds will be > > > statfs()'ed to be checked for Linux' fs magic for shmfs > > > (0x01021994). > > > > What does it expect as a filesystem type if it does not find shmfs > > in fstab but tmpfs? If it does not find tmpfs, will it try /tmp > > anyway (but check for some fstype magic)? > > It searches for every mount which is of type tmpfs or shm. > Whatever it finds must have the fs magic SHMFS_SUPER_MAGIC > (0x01021994). It's in sysdeps/unix/sysv/linux/shm_open.c: I committed it with a lot of your above text as the commit log. Bye, Alexander.
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