From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alexander Graf <agraf@suse.de>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
paulus@samba.org, m.szyprowski@samsung.com, mina86@mina86.com,
linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH -V3 2/4] powerpc/kvm: Contiguous memory allocator based hash page table allocation
Date: Wed, 03 Jul 2013 08:28:29 +1000 [thread overview]
Message-ID: <1372804109.4122.25.camel@pasglop> (raw)
In-Reply-To: <51D2EDD7.9060205@suse.de>
On Tue, 2013-07-02 at 17:12 +0200, Alexander Graf wrote:
> Is CMA a mandatory option in the kernel? Or can it be optionally
> disabled? If it can be disabled, we should keep the preallocated
> fallback case around for systems that have CMA disabled.
Why ? More junk code to keep around ...
If CMA is disabled, we can limit ourselves to dynamic allocation (with
limitation to 16M hash table).
Cheers,
Ben.
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next prev parent reply other threads:[~2013-07-02 22:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-02 5:45 [PATCH -V3 1/4] mm/cma: Move dma contiguous changes into a seperate config Aneesh Kumar K.V
2013-07-02 5:45 ` [PATCH -V3 2/4] powerpc/kvm: Contiguous memory allocator based hash page table allocation Aneesh Kumar K.V
2013-07-02 15:12 ` Alexander Graf
2013-07-02 15:31 ` Aneesh Kumar K.V
2013-07-02 15:32 ` Alexander Graf
2013-07-02 22:28 ` Benjamin Herrenschmidt [this message]
2013-07-02 22:31 ` Alexander Graf
2013-07-03 6:15 ` Paul Mackerras
2013-07-02 5:45 ` [PATCH -V3 3/4] powerpc/kvm: Contiguous memory allocator based RMA allocation Aneesh Kumar K.V
2013-07-02 15:17 ` Alexander Graf
2013-07-02 15:29 ` Aneesh Kumar K.V
2013-07-02 15:32 ` Alexander Graf
2013-07-02 16:28 ` Aneesh Kumar K.V
2013-07-02 16:36 ` Alexander Graf
2013-07-02 5:45 ` [PATCH -V3 4/4] powerpc/kvm: Use 256K chunk to track both RMA and hash page table allocation Aneesh Kumar K.V
2013-07-03 6:16 ` Paul Mackerras
2013-07-02 8:20 ` [PATCH -V3 1/4] mm/cma: Move dma contiguous changes into a seperate config Marek Szyprowski
2013-07-02 15:33 ` Aneesh Kumar K.V
2013-07-08 14:21 ` Alexander Graf
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