linux-kernel - Re: 2.6.29 -mm merge plans

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Message-Id: <20090112140606.cd6f208c.akpm@linux-foundation.org>
Date:	Mon, 12 Jan 2009 14:06:06 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.29 -mm merge plans

On Mon, 5 Jan 2009 23:28:26 +1100
Nick Piggin <nickpiggin@...oo.com.au> wrote:

> On Monday 05 January 2009 19:43:00 Andrew Morton wrote:
> > The individual patches are mostly at
> > http://userweb.kernel.org/~akpm/mmotm/broken-out/
> >
> >
> > mm-remove-the-might_sleep-from-lock_page.patch
> >
> >   Need to think about this.
> 
> Removing this reduces a lot of might_sleep coverage scope. Page
> lock isn't contended in a lot of cases. Why would you drop a
> good debugging feature?

For the reasons described in the changelog, of course.

http://userweb.kernel.org/~akpm/mmotm/broken-out/mm-remove-the-might_sleep-from-lock_page.patch

> > mm-direct-io-starvation-improvement.patch
> > fs-remove-wb_sync_hold.patch
> > fs-sync_sb_inodes-fix.patch
> > fs-sys_sync-fix.patch
> > radix-tree-gang-set-if-tagged-operation.patch
> 
> This one is unneeded because you didn't take the fsync livelock avoidance
> patch that makes use of the new function.

OK

> > make-sure-nobodys-leaking-resources.patch
> > releasing-resources-with-children.patch
> 
> Any reason why not to add these upstream?

Dunno.  Are they valuable?  I've never had a report of them triggering,
I don't think.

> > nr_blockdev_pages-in_interrupt-warning.patch
> 
> Lockdep should catch this, I guess.

Yup.  I forget why I added it.

> > put_bh-debug.patch
> 
> This could just be implemented with a VM_BUG_ON (or FS_BUG_ON) like the
> pagecache refcounting. Wouldn't be a bad idea.

yup, I guess so.  Again, no reports of it triggering in ages.

> > add-a-refcount-check-in-dput.patch
> 
> Again, why not an FS_BUG_ON for things like this too?

Ditto.
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