linux-kernel - Re: [PATCH] Priority heap infrastructure enhancements

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Message-Id: <20080701011414.2f0cccb5.akpm@linux-foundation.org>
Date:	Tue, 1 Jul 2008 01:14:14 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	balbir@...ux.vnet.ibm.com
Cc:	Paul Menage <menage@...gle.com>,
	containers@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Priority heap infrastructure enhancements

On Sat, 21 Jun 2008 13:35:38 +0530 Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> Paul Menage wrote:
> > On Wed, Jun 18, 2008 at 6:48 AM, Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> >> Some of the common code has been factored into heap_adjust() a.k.a heapify
> >> in data structures terminology.
> >>
> >> I am sending out this  patch indepedent of the memory controller changes as
> >> they deserve to be reviewed independently.
> >>
> >> One limitation of the current heap_insert() routine is that it does not
> >> insert an element which is greater than the root, when the heap slots
> >> are fully used. I'll work on and review that interface and find a suitable
> >> way to address that issue
> > 
> > How else would you want it to behave? If you have a fixed size heap
> > and it's full, then you have to drop the largest value. (Well, you
> > could in theory drop the smallest value, but there's no quick way to
> > find that.)
> > 
> 
> I would like to be able to drop the smallest value. Since we cannot drop the
> smallest value, dropping a leaf (heap->size) should be sufficiently good enough.
> I want a max heap and losing the root of the heap does not work for me.
> 
> 
> >> Comments, Flames? Please do review closely!
> >>
> >> Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
> > 
> > Looks fine.
> > 
> > Reviewed-by: Paul Menage <menage@...gle.com>
> 
> Thanks for the review!
> 

yup, thanks.

I'll duck the patch until we have some code which uses it.  Please
retain Paul's Reviewed-by: for that occasion.

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