Re: [NFS] blocks of zeros (NULLs) in NFS files in kernels >= 2.6.20

[Aaron Straus]

Hi,

On Sep 11 12:55 PM, Chuck Lever wrote:
> A more thorough review of the NFS write and flush logic that exists in
> 2.6.27 is needed if we choose to recognize this issue as a real
> problem.

Yep.  

Sorry.  I didn't mean we should revert the hunk.  I was just trying to
help identify the cause of the new behavior.

I think this is a real problem albeit not a "serious" one.  Network
file-systems usually try to avoid readers seeing blocks of zeros in
files, especially in this simple writer/reader case.

It wouldn't be bad if the file is written out of order occasionally, but
we see this constantly now.

We cannot write/read log files to NFS mounts reliably any more.  That
seems like a valid use case which no longer works?

Anyway, thanks for your time!

				=a=



-- 
===================
Aaron Straus
aaron@xxxxxxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/