From: Andi Kleen <andi@firstfloor.org>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>,
Rafael Aquini <aquini@redhat.com>,
linux-mm@kvack.org, Rik van Riel <riel@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: Re: [PATCH 1/4] mm: introduce compaction and migration for virtio ballooned pages
Date: Tue, 26 Jun 2012 22:34:00 +0200 [thread overview]
Message-ID: <20120626203400.GA11413@one.firstfloor.org> (raw)
In-Reply-To: <20120626201513.GJ8103@csn.ul.ie>
> How is the compiler meant to optimise away "cond" if it's a function
> call?
Inlines can be optimized away. These tests are usually inlines.
> What did I miss? If nothing, then I will revert this particular change
> and Rafael will need to be sure his patch is not using VM_BUG_ON to call
> a function with side-effects.
Do you have an example where the code is actually different,
or are you just speculating?
FWIW for my config both generates the same code:
size vmlinux-andi-vmbug vmlinux-vmbug-nothing
text data bss dec hex filename
11809704 1457352 1159168 14426224 dc2070 vmlinux-andi-vmbug
11809704 1457352 1159168 14426224 dc2070 vmlinux-vmbug-nothing
-Andi
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next prev parent reply other threads:[~2012-06-26 20:34 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-25 23:25 [PATCH 0/4] make balloon pages movable by compaction Rafael Aquini
2012-06-25 23:25 ` [PATCH 1/4] mm: introduce compaction and migration for virtio ballooned pages Rafael Aquini
2012-06-25 23:31 ` Konrad Rzeszutek Wilk
2012-06-25 23:57 ` Rafael Aquini
2012-06-26 10:17 ` Mel Gorman
2012-06-26 16:52 ` Andi Kleen
2012-06-26 16:54 ` Andi Kleen
2012-06-26 20:15 ` Mel Gorman
2012-06-26 20:34 ` Andi Kleen [this message]
2012-06-27 9:42 ` Mel Gorman
2012-06-26 22:01 ` Rafael Aquini
2012-06-26 13:17 ` Rik van Riel
2012-06-26 13:20 ` Mel Gorman
2012-06-26 23:57 ` Konrad Rzeszutek Wilk
2012-06-27 15:17 ` Rafael Aquini
2012-06-27 15:30 ` Konrad Rzeszutek Wilk
2012-06-25 23:25 ` [PATCH 2/4] virtio_balloon: handle concurrent accesses to virtio_balloon struct elements Rafael Aquini
2012-06-25 23:25 ` [PATCH 3/4] virtio_balloon: introduce migration primitives to balloon pages Rafael Aquini
2012-06-25 23:25 ` [PATCH 4/4] mm: add vm event counters for balloon pages compaction Rafael Aquini
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