From: Paul Mackerras <paulus@samba.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: benh@kernel.crashing.org, agraf@suse.de,
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 06:15:31 +0000 [thread overview]
Message-ID: <20130703061531.GA25034@drongo> (raw)
In-Reply-To: <1372743918-12293-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
On Tue, Jul 02, 2013 at 11:15:16AM +0530, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
>
> Powerpc architecture uses a hash based page table mechanism for mapping virtual
> addresses to physical address. The architecture require this hash page table to
> be physically contiguous. With KVM on Powerpc currently we use early reservation
> mechanism for allocating guest hash page table. This implies that we need to
> reserve a big memory region to ensure we can create large number of guest
> simultaneously with KVM on Power. Another disadvantage is that the reserved memory
> is not available to rest of the subsystems and and that implies we limit the total
> available memory in the host.
>
> This patch series switch the guest hash page table allocation to use
> contiguous memory allocator.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
WARNING: multiple messages have this Message-ID (diff)
From: Paul Mackerras <paulus@samba.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: kvm@vger.kernel.org, agraf@suse.de, mina86@mina86.com,
linux-mm@kvack.org, kvm-ppc@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, m.szyprowski@samsung.com
Subject: Re: [PATCH -V3 2/4] powerpc/kvm: Contiguous memory allocator based hash page table allocation
Date: Wed, 3 Jul 2013 16:15:31 +1000 [thread overview]
Message-ID: <20130703061531.GA25034@drongo> (raw)
In-Reply-To: <1372743918-12293-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
On Tue, Jul 02, 2013 at 11:15:16AM +0530, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
>
> Powerpc architecture uses a hash based page table mechanism for mapping virtual
> addresses to physical address. The architecture require this hash page table to
> be physically contiguous. With KVM on Powerpc currently we use early reservation
> mechanism for allocating guest hash page table. This implies that we need to
> reserve a big memory region to ensure we can create large number of guest
> simultaneously with KVM on Power. Another disadvantage is that the reserved memory
> is not available to rest of the subsystems and and that implies we limit the total
> available memory in the host.
>
> This patch series switch the guest hash page table allocation to use
> contiguous memory allocator.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
WARNING: multiple messages have this Message-ID (diff)
From: Paul Mackerras <paulus@samba.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: benh@kernel.crashing.org, agraf@suse.de,
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, 3 Jul 2013 16:15:31 +1000 [thread overview]
Message-ID: <20130703061531.GA25034@drongo> (raw)
In-Reply-To: <1372743918-12293-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
On Tue, Jul 02, 2013 at 11:15:16AM +0530, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
>
> Powerpc architecture uses a hash based page table mechanism for mapping virtual
> addresses to physical address. The architecture require this hash page table to
> be physically contiguous. With KVM on Powerpc currently we use early reservation
> mechanism for allocating guest hash page table. This implies that we need to
> reserve a big memory region to ensure we can create large number of guest
> simultaneously with KVM on Power. Another disadvantage is that the reserved memory
> is not available to rest of the subsystems and and that implies we limit the total
> available memory in the host.
>
> This patch series switch the guest hash page table allocation to use
> contiguous memory allocator.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
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next prev parent reply other threads:[~2013-07-03 6:15 UTC|newest]
Thread overview: 67+ 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 5:57 ` Aneesh Kumar K.V
2013-07-02 5:45 ` 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 5:57 ` Aneesh Kumar K.V
2013-07-02 5:45 ` Aneesh Kumar K.V
2013-07-02 15:12 ` Alexander Graf
2013-07-02 15:12 ` Alexander Graf
2013-07-02 15:12 ` Alexander Graf
2013-07-02 15:12 ` Alexander Graf
2013-07-02 15:31 ` Aneesh Kumar K.V
2013-07-02 15:43 ` Aneesh Kumar K.V
2013-07-02 15:31 ` Aneesh Kumar K.V
2013-07-02 15:31 ` Aneesh Kumar K.V
2013-07-02 15:32 ` Alexander Graf
2013-07-02 15:32 ` Alexander Graf
2013-07-02 15:32 ` Alexander Graf
2013-07-02 15:32 ` Alexander Graf
2013-07-02 22:28 ` Benjamin Herrenschmidt
2013-07-02 22:28 ` Benjamin Herrenschmidt
2013-07-02 22:28 ` Benjamin Herrenschmidt
2013-07-02 22:31 ` Alexander Graf
2013-07-02 22:31 ` Alexander Graf
2013-07-02 22:31 ` Alexander Graf
2013-07-03 6:15 ` Paul Mackerras [this message]
2013-07-03 6:15 ` Paul Mackerras
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 5:57 ` Aneesh Kumar K.V
2013-07-02 5:45 ` Aneesh Kumar K.V
2013-07-02 15:17 ` Alexander Graf
2013-07-02 15:17 ` Alexander Graf
2013-07-02 15:17 ` Alexander Graf
2013-07-02 15:17 ` Alexander Graf
2013-07-02 15:29 ` Aneesh Kumar K.V
2013-07-02 15:41 ` Aneesh Kumar K.V
2013-07-02 15:29 ` Aneesh Kumar K.V
2013-07-02 15:29 ` Aneesh Kumar K.V
2013-07-02 15:32 ` Alexander Graf
2013-07-02 15:32 ` Alexander Graf
2013-07-02 15:32 ` Alexander Graf
2013-07-02 15:32 ` Alexander Graf
2013-07-02 16:28 ` Aneesh Kumar K.V
2013-07-02 16:40 ` Aneesh Kumar K.V
2013-07-02 16:28 ` Aneesh Kumar K.V
2013-07-02 16:36 ` Alexander Graf
2013-07-02 16:36 ` Alexander Graf
2013-07-02 16:36 ` Alexander Graf
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
2013-07-02 5:57 ` Aneesh Kumar K.V
2013-07-02 5:45 ` Aneesh Kumar K.V
2013-07-02 6:29 ` virtual machine windows freeze on copy data to an samba share Marko Weber | ZBF
2013-07-03 6:16 ` [PATCH -V3 4/4] powerpc/kvm: Use 256K chunk to track both RMA and hash page table allocation Paul Mackerras
2013-07-03 6:16 ` Paul Mackerras
2013-07-03 6:16 ` Paul Mackerras
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 8:20 ` Marek Szyprowski
2013-07-02 8:20 ` Marek Szyprowski
2013-07-02 15:33 ` Aneesh Kumar K.V
2013-07-02 15:45 ` Aneesh Kumar K.V
2013-07-02 15:33 ` Aneesh Kumar K.V
2013-07-08 14:21 ` Alexander Graf
2013-07-08 14:21 ` Alexander Graf
2013-07-08 14:21 ` Alexander Graf
2013-07-08 14:21 ` Alexander Graf
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