Messages in this thread | | | From | (H. Peter Anvin) | Subject | Re: 2.3.51-52.pre1, shm and mounting somewhere else than /var/shm... | Date | 13 Mar 2000 23:41:34 -0800 |
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Followup to: <20000313104008.N19404@morpheus.linuxpower.org> By author: Jeremy Katz <katzj@linuxpower.org> In newsgroup: linux.dev.kernel > > > --GD+uNaHYxbVPHaQt > Content-Type: text/plain; charset=us-ascii > Content-Disposition: inline > > [ Monday, March 13 2000 ] had Petr Vandrovec saying: > > > is there any reason why SHM must be mounted on /var/shm? If I have > > mounted it in /shmfs, it does following (with xawtv): > [snip strace, etc] > > When I mounted it in /var/shm, it works. Could not shm code start > > walking tree in shmfs root instead of in real root on path /var/shm? > > Have I different SHM namespace if I mount shm in chrooted environment? > > Unfortunately, I do not have address of author of shm changes, so > > I'm asking here. > > Allow me to quote from Documentation/Changes: > "To use System V shared memory, you have to mount the shm filesystem > somewhere and put the mountpoint into /proc/sys/kernel/shmpath. > Default is /var/shm." > > Also, use in chroot'd environments is being worked on -- see Alan's > latest post on the subject. >
This is a good question, though. Since the kernel knows where shmfs is mounted, why not just use that knowledge rather than having to worry about yet another sysctl?
-hpa -- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot."
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