On Mon, Apr 02, 2012 at 04:04:23PM -0400, David Quigley wrote: > On 04/02/2012 15:58, Richard W.M. Jones wrote: > >On Mon, Apr 02, 2012 at 08:32:56PM +0200, Miloslav Trmač wrote: > >>* #834 F18 Feature: /tmp on tmpfs - > >> http://fedoraproject.org/wiki/Features/tmp-on-tmpfs (mitr, > >>17:40:06) > >> * AGREED: tmp-on-tmpfs is accepted (+5 -3) (mitr, 18:12:52) > > > >Actually I think this is a good feature, but ... > > > >The feature page is wrong about "The user experience should barely > >change. This is mostly a low-level change that has little visibility > >to the user." > > > >tmpfs is different in a number of important ways: > > > > - it's very limited in space compared to a real disk > > > > - it doesn't support O_DIRECT > > > > - it doesn't support user extended attrs; and not very old kernels > > didn't support any xattrs at all, meaning things like SELinux > > labels don't work > > > >All this means it's going to need a bit more testing, since > >potentially any package that stores a file on /tmp should be tested > >and may need to be fixed. > > > >Rich. > > > >-- > >Richard Jones, Virtualization Group, Red Hat > >http://people.redhat.com/~rjones > >New in Fedora 11: Fedora Windows cross-compiler. Compile Windows > >programs, test, and build Windows installers. Over 70 libraries > >supprt'd > >http://fedoraproject.org/wiki/MinGW > >http://www.annexia.org/fedora_mingw > > > I really need to remember to send with the right user identity for > this list. > > <resend of my message since its going to bounce> > > That third part is not correct. tmpfs supports SELinux labels. If > you mount a tmpfs filesystem you'll see it reports seclabel as one > of the mount options. You can also just use chcon -t to set the type > on any file you like. SELinux labels are stored in the security > namespace which is separate from user extended attributes. That's not what I said. I said that relatively recent kernels (up to the middle of last year) didn't support system.*, and tmpfs doesn't support user.* at all AFAICT. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://et.redhat.com/~rjones/virt-top -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
