[Lustre-discuss] SCSI driver problem on 2.6.22.19 + lustre 1.8.1?

[Andreas Dilger]

On Sep 01, 2009  15:06 -0400, Brian J. Murrell wrote:
> On Tue, 2009-09-01 at 13:47 -0500, Nirmal Seenu wrote:
> > In lustre 1.8.0.1 it used to be:
> > 
> > journal->j_commit_timer.expires = round_jiffies(transaction->t_expires);
> > 
> > and it is the following in Lustre 1.8.1:
> > 
> >    journal->j_commit_timer.expires = transaction->t_expires;
> 
> Yes, that's one of the differences I listed.

We've since modified this change to use "round_jiffies_up()", which
fixes the upstream problem, while avoiding the hangs it caused in
Lustre.

> > The only other differnece is from the 8kstack-2.6.12.patch which used to 
> > modify the following line in include/asm-i386/thread_info.h
> > 
> > from
> >   #define THREAD_SIZE            (4096)
> > to
> >   #define THREAD_SIZE            (8192)
> > 
> > It seems like, it would be safe for me to rollback the changes to 
> > fs/jbd/transaction.c and continue using 2.6.22.19 kernel.

I think we just ensure that the CONFIG_4K_STACK is not enabled on
servers now.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.