[Linux-cachefs] FS-Cache for NFS-root ?

[Eli Stair]

I actually refrain from running 'cachefilesd' until the system is 
running in the NFS root filesystem, and start it at the end of a 
runlevel.  I don't know that you can work around the issue you're having 
short of launching it that way, or stopping the daemon while in your 
initramfs but before doing your switch_root().  You may be able to work 
around it if you /really/ want to cache those files during boot (I 
understand), if you ditch your bind mount and to a --move instead. 
After all, you don't want the filesystem available in two places, just 
in a /new/ one.

In fact, I'm not entirely sure that move trick will work with the 
running daemon, but let us know?


/eli


Wilhelm Meier wrote:
> The cache is originally mounted on /fscache in the initramfs, then the 
> nfsroot
> is mounted and after that the cache is bind-mounted to /local/fscache on the
> nfsroot. After that the switch_root happens.
> 
> Additionally I create a mount-point /fscache in the nfsroot. Then df shows
> also /fscache (and not the "/fscache not found" anymore), but with wrong
> numbers, since it is an empty mountpoint on nfsroot.
> 
> Do you have a solution for that. Would you mind share your initramfs 
> with me?
> 
> Filesystem           1K-blocks      Used Available Use% Mounted on
> 192.168.39.10:/tftproot/gentoo_A
>                        8256608   5785600   2471008  71% /
> /dev/hda1              8256608   5785600   2471008  71% /fscache
> /dev/hda1               473084    184006    264652  42% /local/fscache
> udev                     30876       156     30720   1% /dev
> shm                      30876         0     30876   0% /dev/shm
> 
> 
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> Wilhelm Meier
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