[Linux-cachefs] [PATCH] [RESEND] fs: cachefiles: Add support for large files in filesystem caching

[Andrew Morton]

On Tue, 19 Jun 2012 10:57:27 +0530 Suresh Jayaraman <sjayaraman at suse.com> wrote:

> > How extensively was this change tested?  Please describe the testing
> > which was performed?
> > 
> 
> The original patch was tested by mounting a NFS share with fscache
> option enabled, do a md5sum on a nfs file larger than 2GB and ensure
> that the file is getting cached by fscache (watch cache size growing)
> on x86_64. 

Well it will need a lot more coverage testing than that.  truncate? 
expanding truncate?  write, lseek, pwrite, pread(), mmap(MAP_SHARED),
behavior at the new max file size (what is that?), etc.