Re: nfs unhappiness with memory pressure

[Nick Piggin]

Trond Myklebust wrote:
> On Tue, 2005-12-06 at 14:36 +1100, Andrew Morton wrote:
>
> > Trond Myklebust <trond.myklebust@xxxxxxxxxx> wrote:
> >
> > > Argh... Not sure entirely how to deal with that... We definitely don't
> > > want the thing futzing around inside throttle_vm_writeout(), 'cos
> > > writeout isn't going to happen while the socket blocks.
> >
> > As far as the core VM is concerned, these pages are really "dirty", only it
> > happens to be a different flavour of dirtiness.  So perhaps we should
> > continue to mark these pages as dirty and let NFS internally take care
> > of which end of the wire they're dirty at.
> >
> > Presumably calling writepage() a second time won't be very useful.  Or will
> > it?  Perhaps when NFS sees writepage against a PageDirty && PageUnstable
> > page it can recognise that as a hint to kick off a server-side write.
>
>
> Calling writepages() would actually be better. That will do the right
> thing, and trigger a commit if there are unstable writes.

writepage should as well, then it would have a better chance
of just doing the right thing.

--
SUSE Labs, Novell Inc.

Send instant messages to your online friends http://au.messenger.yahoo.com 
-
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/