Re: reop_export_file problems

Hi Duncan,

You are running mixed UP / SMP nodes in your cluster and the oops
occured on your SMP node?  Try the attached patch against the
linux-ssi kernel source.

Roger


On 5/25/07, Roger Tsang <[email protected]> wrote:
> It's not a known issue.  I haven't had time to look at your bug which
> is Laura's VPROC code.
>
> Roger
>
> On 5/25/07, Duncan Smith <[email protected]> wrote:
> > As I said in my previous post I am trying to run a standard compiled executable on FC2 with the OpenSSI kernel 1.2.2.  The executable works fine when run locally, but when the second node starts and the process is loadlevelled it occasionally causes a kernel oops which hangs the pc.
> >
> > I have now changed my code, and the executable is called normally from the shell, however the pc still hangs occasionally.  I have noticed that all of the crashes are describes as being in reop_export_file.  Does anyone know if this is a known issue, or should I report a bug?
> >
> > EIP is at reop_export_file [kernel] 0x1b (2.4.22-1.2199.nptl_ssi_9smp)
> >
> > Thanks in advance for your advice
> >
> > Duncan
> >
> >
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--- cluster/ssi/vproc/reopen.c	2006-05-23 01:17:58.000000000 +0000
+++ cluster/ssi/vproc/reopen.c	2007-05-26 06:50:52.253666595 +0000
@@ -759,6 +759,7 @@
 	struct rmtfb_cli *cli;
 	struct rmtfb_svr *svr = NULL;
 	struct inode *inode = file->f_dentry->d_inode;
+	smp_mb();
 	umode_t mode = inode->i_mode;
 	int isreg, error;