RE: Regression seen when HIGHMEM enabled with NFS on 3.1rc4 kernel

[Sricharan R <r.sricharan@ti.com>]

[..]
>>
>> Can you please tell me what the mount options are for this setup?
>
>I'm guessing you've got wsize=1024, in which case, can you please try
>the following patch?
>
The mount options for nfs is rw.

Yes, in my setup wsize=1024 when the issue happened.
I tried your patch and I was not able to see the issue after that,
where as in the other case the issue happened quite frequently.
So I think that the patch fixes the issue.
Thanks a lot for your help.

>Cheers
>  Trond
>8<-----------------------------------------------------------------------
--
>-
>From 7b4a9c76b55dd254431902552528137a2ea5e55d Mon Sep 17 00:00:00 2001
>From: Trond Myklebust <Trond.Myklebust@netapp.com>
>Date: Mon, 12 Sep 2011 11:47:53 -0400
>Subject: [PATCH] NFS: Fix a typo in nfs_flush_multi
>
>Fix a typo which causes an Oops in the RPC layer, when using wsize < 4k.
>
>Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
>---
> fs/nfs/write.c |    2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
>diff --git a/fs/nfs/write.c b/fs/nfs/write.c
>index b39b37f..c9bd2a6 100644
>--- a/fs/nfs/write.c
>+++ b/fs/nfs/write.c
>@@ -958,7 +958,7 @@ static int nfs_flush_multi(struct
nfs_pageio_descriptor
>*desc, struct list_head
> 		if (!data)
> 			goto out_bad;
> 		data->pagevec[0] = page;
>-		nfs_write_rpcsetup(req, data, wsize, offset,
desc->pg_ioflags);
>+		nfs_write_rpcsetup(req, data, len, offset,
desc->pg_ioflags);
> 		list_add(&data->list, res);
> 		requests++;
> 		nbytes -= len;
>--
>1.7.6
>
>
>
>--
>Trond Myklebust
>Linux NFS client maintainer
>
>NetApp
>Trond.Myklebust@netapp.com
>www.netapp.com