Re: Kernel 2.6.20 does not work anymore with SCSI or SATA on oldOpteron / Xeon servers

[Stefan Priebe]

Hello!

With the sysrq i've found the function with is the problem:
inode.c => nfs_getattr => nfs_sync_mapping_range

I've also found the attached patch - which is not included in any stable 
release nor in 2.6.21.X but is public since 20.02.07

I think this is very important.

Stefan Priebe
commit 090ad38f8ceea3cc048981e9fe9cc62ed43fee58
Author: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
Date:   Tue Feb 20 19:28:07 2007 -0500

    NFS: nfs_getattr() can't call nfs_sync_mapping_range() for non-regular files
    
    Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index af53c02..93d046c 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -429,7 +429,8 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
 	int err;
 
 	/* Flush out writes to the server in order to update c/mtime */
-	nfs_sync_mapping_range(inode->i_mapping, 0, 0, FLUSH_NOCOMMIT);
+	if (S_ISREG(inode->i_mode))
+		nfs_sync_mapping_range(inode->i_mapping, 0, 0, FLUSH_NOCOMMIT);
 
 	/*
 	 * We may force a getattr if the user cares about atime.