[Linux-cachefs] Kernel 2.6.30-rc2

[Eli Stair]

An initial "me too" since I haven't had a chance yet to debug why and post 
something more depth... but I'm seeing the same behaviour with -rc3, using 
cachefilesd 0.9 and mount.nfs from nfs-utils 1.1.6.

Many (but not all) files that are read from an fsc-mounted NFS3 share are 
written in the fscache location (using ext3 with user_xattr and dir_index), 
FWIW it seems anecdotally that files >~200MB are not being written to the 
fscache ever.  For some reason the total size of the cache hasn't exceeded 
599MB before triggering an OOPS or simply ceasing to continue filling.

Also, effectively NO cached file reads are occurring from the fscache, as 
evidenced by both inotify and watching IOPS to the underlying block device 
hosting the ext3 filesystem.

I plan to look into this further ASAP, but right now that's all I can say for 
sure.  As soon as I get a chance to reproduce the kernel oops, cachefilesd 
errors, etc I'll re-post if it's before this is fixed.

/eli

Edward Konetzko wrote:
> I have been testing fscache with kernel 2.6.29-rc3 and everything works
> as expected. I have been testing 2.6.30-rc2 and everything appeared to
> be working fine except when I look the resource graphs it seems like
> objects are not being retried from cachefilesd after they are cached on
> disk.  I have stopped cachefilesd, cleaned out its cache, rebooted
> verified everything in dmesg and lsmod is correct and the behavior of no
> caching persists.  I have resorted back to the 2.6.29-rc3 kernel pulled
> from Howells git repo and everything works as expected with no changes
> to the system.
> 
> My test for checking out fscache is very simple I am just copying over
> the kernel try from an nfs mount to local disk then remove the copied
> files and repeat.
> 
> 
> I am building kernel 2.6.30-rc3 right now and going to see if I have the
> same problem.  I was just wondering if there was something wrong with
> 2.6.30-rc2.
> 
> More info about my system
> mount.nfs (linux nfs-utils 1.1.5)
> cachefilesd-0.9.tar.bz2
> 2.6.29-rc3 - works
> 2.6.30-rc2 - appears to not work.
> 2.6.30-rc3 - yet untested.
> 
> 
> Thanks
> Edward
> 
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