On Fri, 2008-10-17 at 14:01 +0100, Ian Campbell wrote: > On Fri, 2008-10-17 at 08:48 -0400, Trond Myklebust wrote: > > I don't see how this could be an RPC bug. The networking layer is > > supposed to either copy the data sent to the socket, or take a reference > > to any pages that are pushed via the ->sendpage() abi. > > > > IOW: the pages are supposed to be still referenced by the networking > > layer even if the NFS layer and page cache have dropped their > > references. > > The pages are still referenced by the networking layer. The problem is > that the userspace app has been told that the write has completed so it > is free to write new data to those pages. > > Ian. OK, I see your point. Does this happen at all with NFSv4? I ask because the NFSv4 client will always ensure that the TCP connection gets broken before a retransmission. I wouldn't therefore expect any races between a reply to the previous transmission and the new one... -- Trond Myklebust Linux NFS client maintainer NetApp Trond.Myklebust@xxxxxxxxxx www.netapp.com -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
