Re: [PATCH] writeback: reset inode dirty time when adding it back to empty s_dirty list

Wu Fengguang
2009-03-29T00:06:00Z

On Fri, Mar 27, 2009 at 07:16:33PM +0800, Jeff Layton wrote:
> On Fri, 27 Mar 2009 10:13:03 +0800
> Wu Fengguang <fengguang.wu@intel.com> wrote:
>
> >
> > > They also don't eliminate the problematic check above. Regardless of
> > > whether your or Jens' patches make it in, I think we'll still need
> > > something like the following (untested) patch.
> > >
> > > If this looks ok, I'll flesh out the comments some and "officially" post
> > > it. Thoughts?
> >
> > It's good in itself. However with more_io_wait queue, the first two
> > chunks will be eliminated. Mind I carry this patch with my patchset?
> >
>
> It makes sense to roll that fix in with the stuff you're doing.
>
> If it's going to be a little while before your patches get taken into
> mainline though, it might not hurt to go ahead and push my patch in as
> an interim fix. It shouldn't change the behavior of the code in the
> normal case of a short-lived dirtied_when value, and should guard
> against major problems when there's a long-lived one.

I'm afraid my patchset will miss the 2.6.30 merge window, so it makes
sense to merge your patch first:

> From: Jeff Layton <jlayton@redhat.com>
> Subject: [PATCH] writeback: guard against jiffies wraparound on inode->dirtied_when checks

Acked-by: Wu Fengguang <fengguang.wu@intel.com>

Thanks,
Fengguang