Hi, >> When appending to a file that exists on a lower layer but doesn't >> exist on a writable layer yet, the file will be copied up but the >> timestamps won't be updated even after closing the file.
> I don't remember such problem. > I have tested what you wrote with "aufs 20080922" and linux-2.6.27 and > it succeeded. See below. > > I may have to check the kernel in Ubuntu. Where can I get it? You can get it from the Ubuntu repository: http://packages.ubuntu.com/ Kernel binary package (includes aufs.ko): http://security.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-2.6.27-11-generic_2.6.27-11.27_amd64.deb More detailed tests: As the branches don't show up in /sys/fs for me, here are the relevant lines from /proc/mounts: 192.168.0.2:/netboot/64 /net-root nfs ro,vers=3,rsize=524288,wsize=524288,namlen=255,acregmin=300,acregmax=900,acdirmin=300,acdirmax=900,hard,nointr,nocto,nolock,proto=tcp,timeo=7,retrans=10,sec=sys,addr=192.168.0.2 0 0 tmpfs /local-root tmpfs rw,mode=755 0 0 aufs / aufs rw,si=d8b1432463e2525,xino=/local-root/.aufs.xino,br:/local-root=rw:/net-root=ro 0 0 192.168.0.2:/netboot/64 /etc/netboot/readonly nfs ro,vers=3,rsize=524288,wsize=524288,namlen=255,acregmin=300,acregmax=900,acdirmin=300,acdirmax=900,hard,nointr,nocto,nolock,proto=tcp,timeo=7,retrans=10,sec=sys,addr=192.168.0.2 0 0 tmpfs /etc/netboot/writeable tmpfs rw,mode=755 0 0 Two were layers were made available in /etc/netboot via mount -o bind . > cd ~ > stat -c "%y %x" .hushlogin 2009-02-01 16:26:04.000000000 +0100 2009-02-01 16:26:04.000000000 +0100 > echo something >> .hushlogin > stat -c "%y %x" .hushlogin 2009-02-01 16:26:04.000000000 +0100 2009-02-01 16:26:04.000000000 +0100 > cd /etc/netboot/writeable/home/user > stat -c "%y %x" .hushlogin 2009-02-01 16:26:04.000000000 +0100 2009-02-01 16:26:04.000000000 +0100 > echo asdf >> .hushlogin > stat -c "%y %x" .hushlogin 2009-02-01 16:26:04.000000000 +0100 2009-02-01 16:26:04.000000000 +0100 > cat .hushlogin something asdf Now it looks like it won't update the times on copied up files at all, even when I modify them directly on the writable layer. Cross-test to verify that tmpfs isn't broken: > grep /tmp /proc/mounts tmpfs /tmp tmpfs rw 0 0 > cd /tmp > stat -c "%y %x" file 2009-02-05 20:15:07.516180916 +0100 2009-02-05 20:14:40.721493822 +0100 > echo asdf >> file > stat -c "%y %x" file 2009-02-05 20:15:19.694257382 +0100 2009-02-05 20:14:40.721493822 +0100 Any ideas? Greets, ~Mattias
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