lkml.org 
[lkml]   [2000]   [Sep]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: NFS locking bug -- limited mtime resolution means nfs_lock() does not provide coherency guarantee

Jeff Epler <jepler@inetnebr.com> writes:
> > > Is there a solution that would allow the kind of guarantee our
> > > software wants with non-linux nfsds without the cache-blowing
> > > that the change I'm suggesting causes?

Trond:
> > As you can see, the idea is to look at whether or not the file has
> > changed recently (I arbitrarily chose a full minute as a concession
> > towards clusters with lousy clock synchronization). If it has, then
> > the page cache is zapped. If not, we force ordinary attribute cache
> > consistency checking.

On Thu, Sep 14, 2000 at 09:48:50AM -0700, Michael Eisler wrote:
> The fix still does not provide coherency guarantees in all situations, and
> at minimum, there ought to be a way to force the client provide a coherency
> guarantee.

I agree.

I wish that the way to force the guarantee was through fcntl(F_???LK), but
we'll take whatever way we can get.

Jeff
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:38    [W:0.061 / U:9.068 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site