linux-kernel - Re: [ 101/175] mm: vmscan: forcibly scan highmem if there are too many buffer

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Date:	Fri, 06 Apr 2012 02:10:03 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Mel Gorman <mgorman@...e.de>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Stuart Foster <smf.linux@...world.com>,
	Hugh Dickins <hughd@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Rik van Riel <riel@...hat.com>,
	Christoph Lameter <cl@...ux.com>,
	Nikola Ciprich <nikola.ciprich@...uxbox.cz>,
	Greg KH <gregkh@...uxfoundation.org>
Subject: Re: [ 101/175] mm: vmscan: forcibly scan highmem if there are too
 many buffer_heads pinning highmem

On Thu, 2012-04-05 at 13:31 -0700, Mel Gorman wrote:
[...]
> > > Addresses https://bugzilla.kernel.org/show_bug.cgi?id=42578
> > [...]
> > 
> > but this bug was reported against 3.1.9, so the fix is presumably needed
> > for 3.2 at least.
> > 
> > Presumably the upstream change doesn't apply cleanly and would need to
> > be backported.  Is anyone planning to do that?
> > 
> 
> It probably does not apply cleanly and considering how the bug is
> triggered I was not treating it as a high priority. Nikola Ciprich
> (added to cc) had said that he might try backporting it and I would
> review the result. I have not heard anything since. I can take a look at
> backporting it next week if it is considered a common problem.

I really don't know; I'm happy to leave it to you and the other mm
maintainers to decide if it's worthwhile.

Ben.

-- 
Ben Hutchings
Reality is just a crutch for people who can't handle science fiction.

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